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December 5, 2003
Contents
1. New Study Reveals Existence of "Compartments"-Like
Social Cliques-In Natural Food Webs
2. Hot Items - CILER - Lake Huron Sinkhole
3. 2 GLERL Position Announcements
4. NOAA Great Lakes Seminar Series at GLERL - Streaming Video Archive
5. GLERL 2004 Proposals
1. New Study Reveals Existence of "Compartments"-Like
Social Cliques-In Natural Food Webs
Excerpt from Press Release
A new study, published this week in the journal Nature, has revealed
the existence of what in human interactions would be referred to
as "cliques" in natural food webs. This research examined
what ecologists have previously theorized: that plants and animals
organize themselves into cliques, just as humans do. These cliques,
also known as compartments, are groups of species in a food-web
that interact more frequently with each other than with species
outside of that compartment. Strong interactions exist among species
within compartments and weaker interactions exist between individual
compartments. This research contributes to a more sophisticated
understanding of food web dynamics by illustrating how species interact
and, thus, how they impact each other. This better understanding
of food webs will help natural resource managers make better management
decisions that affect food webs.
Food webs are multiple interconnecting food chains. Predators are
likely to have more than one prey and prey are likely to have more
than one predator, thereby creating a web of interactions, not a
chain. A common approach of understanding how species interact in
food webs is to categorize them into trophic-or hierarchical-levels,
where groups of species with similar food resources and predators
are associated with each other. The trophic level concept alone,
however, provides an incomplete understanding of food-webs, because
it only provides one view of the picture; it looks at which species
are competitors, but not at the other associations species make
in the food web.
The discovery of compartments within food webs provides a more
advanced understanding of species interactions with each other in
the environment. The research, published this week in Nature, applies
principles for describing social systems to food webs-an exciting
new way to view food web structures and to identify compartments
in food-webs. The scientists employed a recently developed social
network method. "It has been proposed that social systems are
more efficient and durable when composed of subgroups in which interactions
are concentrated," said Dr. Ken Frank of Michigan State University
and member of the research team. "This appears also to be the
case for food-web compartments in ecology, and this method identifies
compartments in which interactions are concentrated." Dr. William
Taylor of Michigan State University and a member of the research
team added: "This study highlights the importance and necessity
of interdisciplinary science and problem solving."
"The compartment method of measuring species interactions
in an ecosystem has its benefits," said Ann Krause of Michigan
State University, a member of the research team. "This method
is more systematic and rigorous, as it assigns species to certain
compartments based on observed research-not based on a researcher's
guess-and tests the results for significance. Moreover, if compartments
can be found to enhance stability in nature like they were found
to do in theoretical research, we now have another tool with which
to better understand stability in ecosystems. Stability is important
for maintaining ecosystem health."
"This study will provide a mechanism for others to study and
measure the stability of food-webs," added Dr. Doran Mason
of the Great Lakes Environmental Research Laboratory, a member of
the research team. "Understanding food web stability significantly
enhances our understanding of ecosystems which, of course, helps
biologists and managers in their efforts to protect and improve
the system. With future applications based on this research, we
may find that managers should also focus on maintaining compartments
in food webs, which are whole groups of species, not just maintaining
the population of a single species, to maintain ecosystem health
and integrity."
This research is a collaborative among scientists Ann E. Krause,
Kenneth A. Frank, and William W. Taylor from Michigan State University's
Department of Fisheries & Wildlife; Robert E. Ulanowicz from
the University of Maryland; and Doran M. Mason of the National Oceanic
and Atmospheric Administration's Great Lakes Environmental Research
Laboratory. This research was funded by the Great Lakes Fishery
Commission, the National Institute of Child Health and Human Development,
and the National Science Foundation.
2. Hot Items - CILER - Lake Huron Sinkhole
Excerpt from NOAA Hot Items
CILER Director Thomas Johengen and Dr. Guy Meadows from the University
of Michigan recently partnered with the NOAA Thunder Bay National
Marine Sanctuary, the NOAA Great Lakes Environmental Research Laboratory,
and the Institute for Exploration on a research cruise to explore
and sample a recently discovered karst sinkhole on the floor of
Lake Huron in 95m of water. Dr. Meadows led the exploration and
sampling of the sinkhole using the University of Michigans
remotely-operated vehicle, M-ROVER. M-ROVER was used to provide
fine-scale mapping of the sinkhole and to provide samples for an
exploratory study of the hydrology, chemistry, and microbiology
of the groundwater venting from the Silurian-Devonian aquifer. The
source and distribution of the plume were mapped by pumping water
through a CTD mounted on M-ROVER and then pumping water samples
up to the deck of the boat where they were captured for detailed
chemical and biological analyses. Water samples were collected and
analyzed for nutrients, cations, organic acids, alkalinity, microbial
abundance, heterotrophic production, and chemosynthetic activity.
In situ observations revealed the plume water had an elevated temperature
of 3.5 ºC and an order of magnitude elevated conductivity over
ambient bottom water. The conductivity was primarily sulfate based
and there was strong evidence for chemosysnthesis and hydrogen sulfide
production. This exploration may be the first of its kind to find
direct evidence for such a unique chemosynthetic environment within
the Great Lakes. Photos from the research cruise can be found at:
http://www.ciler.org/news/photos/110303.html
3. 2 GLERL Position Announcements
Announcement Number: C-ERL-04001.SLW
Title: Research Physical Scientist
PP/Series/Grade: GS/1301/12
Location: Ann Arbor, MI
Announcement Number: C-ERL-04003.SLW
Title: Research Physical Scientist
PP/Series/Grade: GS/1301/12
Location: Ann Arbor, MI
You can view the vacancy announcements on the COOL website at
http://www.jobs.doc.gov
4. NOAA Great Lakes Seminar Series at GLERL - Streaming Video
Archive
"Newly Discovered and Corroborated Deleterious Effects of
Zebra Mussels on Lake Ecosystems" Dr. David F. Raikow, Ecologist
Video archive available:
ftp://ftp.glerl.noaa.gov/webcast/2003/raikow/20031014.wmv
PowerPoint:
ftp://ftp.glerl.noaa.gov/webcast/2003/raikow/20031014.pdf
5. GLERL 2004 Proposals
GLERL Internal Proposals include all internally and externally funded
GLERL research - continuing and new. Proposals for continuing projects
include a report on findings to date. Copies available on request.
Comments are welcome through mid-December. Send to the individual
PI, Dr. Brandt or to me as appropriate. I would be especially interested
in knowing which projects might be of interest to your constituents.
- Brandt
- Effects of Diporeia declines on fish diet, growth and food
web dynamics in southeast Lake Michigan
- An evaluation of bioenergetics modeling for lake whitefish
in Lake Michigan
- Complexity and Stressors in Estuarine Systems (COASTES)
- Toward the Census of Marine Life: Proof of Concept Through
the Integration of Traditional, Optical and Acoustic Zooplankton
and Fish Data in the Chesapeake Bay
- Ecosystem Variability and Estuarine Fisheries
- Regional Collaboration in Environmental Monitoring and Forecasting
in the Northern Adriatic Sea
- Workshop: Development of an Integrated Coastal Observing
System for the Great Lakes
- Assel
- Ice thickness data rescue
- Improved great lakes ice cover climatology
- Great lakes ice cycles
- Recent lake levels & precipitation in historical perspective
- Croley
- Great Lakes Climate Change Hydrologic Impact Assessment
- Next Generation Large Basin Runoff Model
- Water Resources Decision Support
- Eadie
- Watershed - Great Lakes Interactions: Defining the Ecological
Footprint of the Muskegon River Watershed on Fisheries in
Nearshore Lake Michigan
- The Impact of Episodic Events on Great Lakes Ecosystems
(EEGLE)
- Lake Michigan Mass Balance - Fluxes of Carbon and Nutrients
- The Sediments of Lake Erie
- Fahnenstiel
- Florida ECOHAB
- The Impact of Episodic Events on Great Lakes Ecosystems
(EEGLE): Phytoplankton Dynamics
- Hawley
- Measurement and modeling of wave-induced sediment resuspension
in nearshore water
- Origin and maintenance of the benthic nepheloid layer (bnl)
- Sediment resuspension and transport in Lake Michigan
- Measurements of particle properties during resuspension
events
- Landrum
- Assessing Ecological Risks Posed by a Ballast Water Disinfectant
- Bioavailability of Sediment-Associated Toxic Organic Contaminants
- Contaminant Effects Using Body Residues as the Dose Metric
- Leshkevich
- CoastWatch Operations
- CoastWatch Research and Product Development
- Lake Erie Turbidity Database
- Liu
- Rogue Waves and Explorations of Coastal Wave Characteristics
- Measurement and time-frequency study of nearshore wind,
wave and sediment resuspension
- Lofgren
- Dynamical Modeling of Great Lakes Regional Climate
- Climate and Land Use Change Processes in East Africa
- Overlake Wind Events on Lake Erie
- Climate Change Storm Structure and Resultant Great Lakes
Hydrologic Impacts
- Lozano
- Development of monitoring protocols for Great Lakes wetland
restoration
- Distribution and biomass of Dreissenids in Lake Erie
- Ludsin
- Ecosystem Variability and Estuarine Fisheries: A Synthesis
(linked to Brandt of same title)
- Mason
- Bioenergetic response of gag grouper to reef habitat configuration
- Quantifying the impact of exotic invertebrate invaders on
food web structure and function in the Great Lakes: Development
of network analysis tools
- Dynamics of Alewife Recruitment Variability in Lake Michigan
- Mechanisms affecting recruitment of yellow perch in Lake
Michigan
- Development of a lake-wide acoustic monitoring program for
Lake Superior pelagic fishes, phase I: In situ relations of
target strength to fish size and target classification
- Modeling the influence of lake circulation patterns, upwelling
events and turbulence on fish recruitment variability in Lake
Michigan
- Salmonid spawning stock abundance, recruitment and exploitation
in the Muskegon River, Michigan
- Study group on fisheries acoustics in the Great Lakes
- McCormick
- Lake Champlain
- Thermal structure monitoring and related studies
- EEGLE - 9
- Nalepa
- Long term trends in Benthic Populations in Lake Michigan
- Pelagic-Benthic Coupling in Nearshore Lake Michigan: Linking
Pelagic Inputs to Benthic Productivity
- Assessments of benthic macroinvertebrate communities in
the Great Lakes region
- Ecology of Lake Whitefish and Response to Changes in Benthic
Communities in Lake Huron
- Biomass, Condition of Western Lake Erie Dreissenids
- Peacor
- Development of a food web model (DOVE- Digital Organisms
in a Virtual Ecosystem) to examine problems concerning invasive
species
- Trait-mediated effects of invasive predatory cladocerans
- Reid
- New Bathymetry of the Great Lakes
- Computational Modeling of Ballast Tanks to Improve Understanding
and Maximize Effectiveness of Management Practices and Treatment
Mechanisms
- Assessment of Transoceanic No-Ballast-On-Board (NOBOB) Vessels
and Low-Salinity Ballast Water as Vectors for Nonindigenous
Species Introductions to the Great Lakes Project
- Great lakes Aquatic Invasive Species Database
- Invertebrate Resting Eggs an unaddressed secondary
aquatic invasion vector
- Identifying, Verifying, and Establishing Options for Best
Management Practices for NOBOB Vessels
- Robbins
- Environmental Radiotracers
- Ruberg
- Great Lakes Observation System
- Real-time Meteorological Observation Network
- Sellinger
- Schwab
- Lake Circulation Studies and the Great Lakes Coastal Forecast
System
- Real-time Meteorological Observation Network
- Hydrodynamic and Sediment Dynamics Modeling
- Climatology of the Physical Environment in Lake Erie
- Vanderploeg
- Implications of Cercopagis and Bythotrephes to alewife recruitment
and stability of the Lake Michigan pelagic food web
- Changes in the pelagic food web of southern Lake Michigan:
A food web under stress from non-indigenous species?
- The role of zebra mussels in promoting Microcystis blooms
and other ecosystem changes in Saginaw Bay and in Lake Erie
- Dreissenid mussels as homeostatic filter feeders and nutrient
excreters: Implications for nutrient cycling, seston concentration
and quality, and toxic algal blooms in western Lake Erie
|
November 10, 2003
Contents
1. NOAA Publishes Electronic Great Lakes Ice Atlas
2. New Reprints
3. NOAA Great Lakes Seminar Series at GLERL
___________________________________________________________________________________________
1. NOAA Publishes Electronic Great Lakes Ice Atlas
Excerpt from NOAA News Online
To some of us, ice is nothing more than a clear cube of frozen
liquid that we use to cool our beverages, but to people and creatures
who live in and around lakes, it is part of the ebb and flow of
their daily life. NOAA published a new 30-year electronic atlas
of ice cover for the Great Lakes. The atlas contains data on more
than 1,200 digitized Great Lakes ice charts for winters from 1973
to 2002 and an analysis of these ice charts.
Ice is nice, but who would use such a collection of information?
The atlas is a resource for those seeking information on Great
Lakes ice cover climatology. It provides a benchmark of ice cover
and ice cover variation of the Great Lakes during the last quarter
of the 20th century and early years of the 21st century, Assel
said. Assel added that the Navy/NOAA National Ice Center and the
Canadian Ice Service use information from this atlas in making operational
Great Lakes ice charts. Portions of these data have also already
been used by other federal and state government agencies, academia
and the private sector for research, educational, operational and
engineering applications. People who are involved in fisheries studies
know that ice cover is an important factor in the life cycle of
certain fish species; people who model lake levels know that more
ice cover means less evaporation; Great Lakes shippers, the U.S.
Coast Guard and the Army Corps of Engineers need to know ice conditions
for planning and for operational activities in winter and early
spring; and river ice jams in the connecting channels of the Great
Lakes can cause damage to shore property and loss of hydroelectric
generating capacity, Assel said. Also, people who enjoy ice
fishing want to know when the bays and harbors freeze over,
he said.
The atlas offers three types of analysis products.
* Ice charts dates of the first reported ice, dates of the last
reported ice, and ice duration for each winter, as well as statistics
over the 30-wintersthe maximum, minimum and average;
* A 30-winter set of annual daily ice cover time series. The daily
time series was used to create computer animations of spatial patterns
of ice cover for each winter and line plots of lake-averaged ice
cover for each lake over the 30 winters;
* Weekly ice charts of maximum, 3rd quartile, median, 1st quartile,
and minimum ice cover concentrations for the 30-winter base period.
The weekly statistics are based on the original ice chart data set
and not on the daily time series.
The atlas contains a lot of information1.4 gigabytes of data,
much of which is in compressed files (about 4 gigabytes when uncompressed).
The online version of this atlas can be used to browse and download
a limited amount of data.
However, because of its large size, it is not practical to download
the entire atlas from the Internet. Therefore, it is also available
on CD-ROM and DVD formats. To request a copy of the atlas on CD-ROM
or DVD send an e-mail to Cathy.Darnell@noaa.gov
or to iceatlas.glerl@noaa.gov.
(Please provide your name and complete mailing address.)
Media Contact: Jana Goldman, NOAA Research, (301) 713-2483
2. New Reprints
For Copies contact Cathy.Darnell@noaa.gov
* Raudsepp, U, D Beletsky and DJ Schwab. Basin-scale topographic
waves in the Gulf of Riga. Journal of Physical Oceanography. 33:1129-1140
(2003).
* Price, H, SA Pothoven, MJ McCormick, PC Jensen and GL Fahnenstiel.
Temperature influence on commercial lake whitefish harvest in eastern
Lake Michigan. JGLR 29(20):296-300 (2003).
* Leshkevich, GA and S Li. Environmental monitoring of the Great
Lakes using CoastWatch data and JAVA GIS. Backscatter (Spring 2003)
13-16. 2003.
* Ngheim, SV and GA Leshkevich. Great Lakes ice mapping with satellite
scatterometer data. Final Technical Report JPL Task Plan 70-6362,
JPL Task Order 15407. Jet Propulsion Laboratory, Pasadena, CA, 26pp.
2003.
* Landrum, PF, L Sano, MA Mapili, E Garcia, AM Krueger and RA Moll.
Degradation of chemical biocides with application to ballast water
treatment. NOAA Technical Memorandum GLERL-123. NOAA, GLERL, Ann
Arbor, MI. 37pp. 2003.
* Croley, TE II. Weighted-climate parametric hydrologic forecasting.
Journal of Hydrological Engineering. 171-180. 2003.
* Werner, EE and SD Peacor. A review of trait-mediated indirect
interactions in ecological communities. Ecology 84(5):1083-1100.
2003.
* Rodionov, S and RA Assel. Winter severity in the Great Lakes region:
a tale of two oscillations. Climate Research 24:19-31. 2003.
* Lofgren, BM. Coupled atmosphere-land-lake climate simulation using
a regional model. Verh. Internat. Verein. Limnol. 28:1745-1748.
2002.
* Nuutinen, S, PF Landrum, LJ Schuler, JVK Kukkonen and MJ Lydy.
Toxicokinetics of organic contaminants in Hyalella axteca. Achives
of Environmental Contamination and Toxicology. 44: 467-475. 2003.
* Ngheim, SV and GA Leshkevich. Great Lakes Winter Experiment 2002
(GLAWEX 2002). Synthetic aperture radar applications to ice-covered
lakes and rivers. NASA, Jet Propulsion Laboratory, Pasadena, CA,
10pp. 2003.
* Brandt, SB and DM Mason. Effect of nutrient loading on Atlantic
Menhaden (Brevoortia tyrnnus) growth rate potential in the Patuxent
River. Estuaries 26(2A)298-309. 2003.
* Hawley, N. Observations of the intermediate and benthic nepheloid
layers in sourthern Lake Michigan during the summer of 1995. NOAA
Technical Memorandum, GLERL 124. NOAA GLERL, Ann Arbor, MI. 30pp.
2003. ftp://ftp.glerl.noaa.gov/publications/tech_reports/glerl-124/tm-124.pdf
* Brandt, SB. A bold step forward: Ecosystem forecasting, integrated
observing systems, and International Field Years for the Great Lakes.
JGLR 29(3)373-374. 2003.
3. NOAA Great Lakes Seminar Series at GLERL
Pending speakers' permission, all seminars below will be available
via the web.
Wednesday, November 12, 2003 - 11:00am. Oxygen Concentration
and Demand in Lake Erie Sediments. Dr. Gerald Matisoff, Department
of Geological Sciences, Case Western Reserve University, Cleveland,
OH.
Abstract: The Great Lakes Water Quality Agreement (GLWQA) specifically
targets phosphorus load reductions to achieve the elimination of
seasonal anoxia in the hypolimnion of the Central Basin of Lake
Erie. This has led to regular ship-board monitoring of oxygen in
the hypolimnion of the Lake to monitor the status of the lake and
determine if the water quality is meeting the terms of the GLWQA.
However, lake-wide monitoring is expensive and there is even a difference
of opinion on whether dissolved oxygen depletion rate is a good
indicator of the condition of Lake Erie. One the most poorly known
components of the Lake Erie oxygen budget is the sediment-oxygen
demand (SOD). This work compares EPAs data with three different
methods for determining SOD: monitoring of oxygen in the water column
of incubated cores, vertical oxygen concentration profiles measured
by micro-oxygen electrode, and computer biogeochemical modeling.
The SOD is the flux of oxygen across the sediment-water interface
and is calculated from the oxygen gradient across the sediment-water
interface. This work addresses temporal and spatial variations in
sediment oxygen concentration and demand in Lake Erie during the
summer of 2002 and August 2003.
Thursday, November 13, 2003 - 1:30pm. The NOS (National
Ocean Service) Great Lakes Observing Network. Mark Bushnell, Program
Leader for the Ocean Sensor Technology and Evaluation Program within
NOAA/NOS/CO-OPS, and, Jennifer Werner, Civil Engineer, NOAA/NOS/CO-OPS
Abstract: This seminar will provide an overview of the existing
Great Lakes observing network, future planned deployments, and NOS's
Oceans Systems Test & Evaluation Program with emphasis on the
side-looking ADCP. NOAA's Center for Operational Oceanographic Products
and Services (CO-OPS) operates and maintains the Great Lakes Water
Level Observation Network comprised of 51 stations on the Great
Lakes and connecting waterways. The program provides critical real-time
water level and meteorological observations for a number of applications
including navigation, power generation, and coastal management.
An overview of the program will be presented, including new technologies
and partnerships.
Thursday, November 20, 2003 - 10:30am. The Benthification
of Freshwater Lakes: Exotics Turning Ecosystems Upside Down. Christine
Mayer Assistant Professor, Department of E.E.E.S. University of
Toledo, Lake Erie Center.
Abstract: We define benthification as an increase in the importance
of benthic processes following increased water clarity promoted
by nutrient reduction and Dreissena introduction. However, the relative
contributions of these two factors to the process of benthification
are not yet understood. In a benthified system, the extent of potential
benthic primary production increases. Benthic grazers may respond
positively to increased benthic algal production. In contrast, pelagic
primary production may, or may not change as standing crop declines,
but detrital rain to the profundal zones should decrease whereas
direct importation of organic material will increase in Dreissena
colonized areas. Therefore, the overall flux of material from the
pelagic to benthic zones may not change. In contrast, the flux of
materials from benthic to pelagic zones should increase, as visually
feeding fish will forage more efficiently on benthic invertebrates.
The overall effect of benthification will be to increase the production
and flux of organic material from the lake's bottom. Long-term data
from six aquatic ecosystems for which a minimum 15 years of data
on nutrient concentration, water clarity and time of Dreissena invasion
were examined to determine whether nutrients or Dreissena more strongly
influence increased water clarity. Our results suggest that Dreissena
introduction has had more influence on the increase in water clarity
of each lake examined. Data from Oneida Lake, NY show that the rate
of benthic primary production and flux of material to the water
column have increased.
|
October 6, 2003
An Electronic NOAA Great Lakes Ice Atlas
This Atlas (which is available on GLERL's Web Site at: http://www.glerl.noaa.gov/data/ice/atlas/
contains approximately 1.4-gigabytes of data, much of which is in
compressed files (about 4-gigabytes when uncompressed). The online
version of this atlas can be used to browse and download a limited
amount of data. However, because of its large size it is not practical
to download the entire atlas from the Internet. Therefore, it is
also available on CD-ROM and DVD formats. To request a copy of the
atlas on CD-ROM or DVD send an email to Cathy.Darnell@noaa.gov or
to iceatlas.glerl@noaa.gov. (Please provide your name and full surface
mail address).
The atlas contains data on over 1200 digitized Great Lakes ice
charts for winters from 1973 to 2002 and three types of analysis
products. The first analysis product includes ice charts of the
following: dates of the first reported ice, dates of the last reported
ice, and ice duration for each winter, as well as, the maximum,
minimum and average ice cover concentrations. The second analysis
product is a 30-year set of annual daily ice cover time series.
The daily time series was used to create: 1) computer animations
of spatial patterns of ice cover for each winter, 2) line plots
of lake averaged ice cover for each lake over the 30 winters. The
third analysis product is weekly statistics. There are weekly ice
charts and grids of: maximum, 3rd quartile, median, 1st quartile,
and minimum ice cover concentrations for the 30-winter base period.
The weekly statistics are based on the original ice chart data set
and not on the daily time series.
NOAA Great Lakes Seminar Series at GLERL
http://www.glerl.noaa.gov/news/seminars/
Wednesday, October 15, 2003. 10:30 a.m.
Historical Response of Zooplankton Communities to Ecological Change
in Lake Victoria (East Africa)
Dr. Thomas Bridgeman, Research Assistant Professor, University
of Toledo, Lake Erie Center
The introduction of a large predator, the Nile perch (Lates
niloticus), caused devastating losses in the fish community
of Lake Victoria between 1960-1990, with an accompanying loss of
zooplankton and phytoplankton species diversity. Climate change
and anthropogenic influences have also been implicated in these
losses, but analysis has been confounded by a scarcity of historical
records, creating difficulties in determining the timing of changes
in zooplankton, phytoplankton, and fish communities in relation
to each other. In this study, fossil remains of diatoms, zooplankton
(Bosmina, chydorids), and an invertebrate predator (Chaoborus)
in sediment cores were analyzed to assemble a 50-year record of
changes in the plankton community. The most dramatic changes occurred
in the 1980s when several cladoceran species were extirpated from
nearshore zooplankton assemblages. These losses corresponded to
a rapid shift in the diatom community from dominance by Aulacoseira
sp. to Nitszchia sp., and to increasing populations of
Chaoborus and the cyprinid planktivore Rastrineobola argentea
in nearshore areas. The results suggest that the demise of cladoceran
zooplankton resulted from increasing predator densities combined
with environmental changes that led to increased hypoxia of bottom
waters. An additional example of the importance of stratification
and hypoxia in structuring invertebrate communities is given from
current research on western Lake Erie mayfly (Hexagenia sp.)
recruitment.
If you would like to view this seminar remotely, please request
that it be recorded before October 8.
|
September 29, 2003
NOAA Great Lakes Seminar Series at GLERL
http://www.glerl.noaa.gov/news/seminars/
Tuesday, October 14, 2003 - 10:30 a.m.
Newly Discovered and Corroborated Deleterious Effects of Zebra Mussels
on Lake Ecosystems - Dr. David F. Raikow
Abstract
Although the invasion of zebra mussels (Dreissena polymorpha)
is now nearly twenty years old and has been studied extensively,
serious deleterious effects continue to be uncovered. A series of
experiments and observational studies was conducted throughout the
lower peninsula of Michigan to ascertain the effects of zebra mussels
on inland lakes, a set of ecosystems invaded relatively recently.
These studies included a state-wide survey of phytoplankton communities
across a Total Phosphorus (TP) gradient and large scale 50,000-L
mesocosm experiments in Gull Lake. Other mesocosm experiments at
the pond facility of the Kellogg Biological Station, Michigan State
University, demonstrated Dreissena impacts on larval fish growth
rates through food web interactions. Surveyed lakes with Dreissena
were found to have lower concentrations of Dissolved Organic Carbon
(DOC), which could render lakes more susceptible to the ill-effects
of UV-B radiation. Lakes with Dreissena were also found to have
less total phytoplankton biomass. Surprisingly, there was a positive
relationship between Dreissena presence and dominance of the noxious
cyanobacterium Microcystis aeruginosa in low nutrient lakes.
Mesocosm experimentation on Dreissena and Microcystis displayed
effect reversals between years, illustrating complex interactions
between consumers, prey, and nutrient levels. Among the conclusions
of this work is the possibility that monitoring and abatement of
nutrient inputs to lakes may not be sufficient to predict and control
cyanobacterial dominance of Dreissena-invaded lakes.
Please let me know by October 7th if you are interested in a webcast
of this seminar!
|
September 15, 2003
Please Update your address books... The e-mail address for Rochelle
Sturtevant is rochelle.sturtevant@noaa.gov. GLERL is phasing out
the other version of our addresses (glerl.noaa.gov) to take advantage
of NOAA firewalls. I have been experiencing some difficulties receiving
mail through the old address for a few weeks now (it had been running
fine in parallel for a year) -- if you have not heard back from
me on a message which you sent via e-mail over the last few weeks,
please resend to the 'new' address.
NOAA Great Lakes Seminar Series - http://www.glerl.noaa.gov/news/seminars/
Date: Monday, September 22, 2003
Time: 10:30 a.m.
Title: "Calibrating in situ fluorescence to chlorophyll concentration
for Lake Michigan"
Speaker: Leah Welty, University of Chicago
For more information, contact: Dr. Thomas Johengen (University
of Michigan/CILER), 734-764-2426
I do not currently plan to videotape this seminar. If you would
like to see a video, please let me know asap so that I can make
arrangements.
Speaker ideas for our fall series welcome!
Great Lakes Congressional Tour
Along with the Great Lakes Commission, Great Lakes Fishery Commission,
the USGS Great Lakes Science Center, and the Canadian Consulate
General, GLERL sponsored a tour of the Buffalo-Niagara region for
Congressional staff August 12-14. 18 staff participated in the tour,
most from the Washington offices of members of Congress from the
Great Lakes region. Highlights of the "Odessey II" tour
included a VIP reception and dinner hosted by the Canadian consulate
at Inniskillin winery, research cruises aboard the research vessels
Laurentian, Kaho and Musky, a sea lamprey control demonstration,
and a variety of speakers on topics ranging from binational cooperation
to aquatic nuisance species. While not a co-sponsor, NY Sea Grant
was a major contributor to the success of the tour: Jack Mattice
gave the group an overview of Sea Grant as well as local commentary
on the Niagara region and Chuck O'Neill gave an overview of the
outreach side of ANS work. NY Sea Grant was also instrumental in
helping us line up local speakers for the AOC portion of the tour
and helping plan the local logistics.
|
August 28, 2003
Contents
1. GLERL in the News - Critter's demise puts fish in peril
2. NOAA Great Lakes Seminar Series at GLERL
1. GLERL in the News - Critter's demise puts fish in peril
Excerpt from Chicago Tribune - August 24, 2003 - Julie Deardorff
The spineless scud--a high-calorie, high-fat crustacean that fish
love to feast on--has been a resilient Great Lakes resident since
the end of the Ice Age. But new research confirms a trend scientists
have been watching for a decade--the scud are declining and have
now vanished from some regions of the lakes, creating a food shortage
for several species of fish.
The swift demise of the scud is just one finding in The State of
the Great Lakes 2003, a mixed report that cited a number of problems
looming for Lake Michigan and the other Great Lakes. Though Lake
Michigan is also suffering from wetland decline and toxic contaminants,
the loss of the tiny but vital shrimplike scud, also called diporeia,
further stresses an already fragile food chain in the Great Lakes.
Researchers believe the troublesome zebra mussel is again the culprit.
This time, the invasive mollusk is starving the diporeia population
by cleaning up algae before the sediment-dwelling scud can eat them.
The impact has been recently documented on the whitefish population
and many other fish, including sculpin, smelt and chub, which in
turn are food for trout and salmon. Diporeia make up 25 to 75 percent
of the whitefish diet, contributing as much as 61 percent of its
weight, according to the National Oceanic and Atmospheric Administration.
Still confounding scientists, however, is that although the small
orange-tinted crustaceans are declining, they are showing no physiological
signs of starvation, said Tom Nalepa, who wrote the section on diporeia
in the report, a joint project of the U.S. Environmental Protection
Agency and Environment Canada. "Their weight is still high
and they don't look stressed, yet they are dying off," said
Nalepa, a research biologist with the Great Lakes Environmental
Research Lab.
Lake Michigan "is in middling shape," said Paul Bertram
of the EPA's Great Lakes Program office, the lead editor of the
U.S. section of the report. "Diporeia is a real concern. The
decline is so dramatic that we're worried about what it will do
to the food web and the upper-level fisheries."
The disappearance of the diporeia is closely tied to the arrival
of the zebra mussel, which invaded the Great Lakes in the 1980s,
transported in the ballast water of an ocean-going ship. In some
places, such as southern Lake Michigan, scud have been wiped out.
Between 1994 and 2000, scud declined 68 percent in Lake Michigan,
Nalepa said.
They can still be found from Racine, Wis., to Waukegan--but they
have vanished from Chicago, Gary and along Michigan's shoreline.
The problem has spread to more lakes over the last several years.
"Now that they're gone, fish have to find other things to
feed on," Nalepa said. "Some are changing their forage
patterns and moving to deeper water, looking for food. When they
do find food, it's in water that is colder than they're used to."
The lack of diporeia has altered the feeding patterns of many lake
fish, especially whitefish, which are getting so skinny that fillets
are hard to come by. Biologists have found zebra mussel shells in
the stomachs of whitefish, which means the fish are eating the less
nutritious and hard-to-digest mussels instead of the scud.
Still, researchers can't pinpoint the problem. Thumbnail-size zebra
mussels sit on top of sediment and filter the food before it settles
to the bottom. But though scud seem hard to kill--they can live
on their fat for 90 days without food--they are still dying off.
Another confusing development is that the seemingly healthy scuds,
which live in the top two centimeters of sediment, are dying off
at different rates. In 1992, in southeastern Lake Michigan, they
perished within six months, Nalepa said. But just a short distance
away, near Muskegon and Grand Haven, Mich., they've been declining
over five years.
"We're looking for a disease vector and there are things in
the animal's body, but the incidence rate is less than 5 percent,"
Nalepa said. "It just doesn't make sense that an animal that
is not infected is dying off completely."
2. NOAA Great Lakes Seminar Series at GLERL
http://www.glerl.noaa.gov/news/seminars/
"Evaluating changes in winter climatology and hydrology of
the Lake Michigan basin from 1948 to 2000" Erin Argyilan, Ph.D.
Candidate, Dept. of Earth and Environmental Sciences - University
of Illinois at Chicago
Thursday, September 11 - 2:30 p.m.
For more information, contact:
Dr. Brent Lofgren
Brent.Lofgren@noaa.gov
|
August 20, 2003
Contents
1) New ANS Fact Sheet - Great Lakes Aquatic Nonindigenous Species
List
2) New ANS Web Page - National Center for Research on Aquatic Invasive
Species
3) GLERL to Hire a Research Aquatic Biologist
4) Ecological Forecasting Workshop
____________________________________________________________________
1) New ANS Fact Sheet - Great Lakes Aquatic Nonindigenous Species
List
A new Fact Sheet has been added to the GLERL series describing
the Great Lakes Aquatic Nonindigenous Species List - the first product
of the new NOAA National Center for Invasive Species at GLERL. The
fact sheet is available 'print-on-demand' at GLERL's website - please
help us advertise this new effort. Check the fact sheet out at:
http://www.glerl.noaa.gov/pubs/brochures/ANSlist/ANSlist.pdf.
A separate fact sheet describing the center is also in progress.
2) New ANS Web Page - National Center for Research on Aquatic
Invasive Species
By now, most of you with an interest in this area have likely seen
the news reports announcing the formation of a NOAA Center for Research
on Aquatic Invasive Species. The web page with more information
on the center is now available - Check it out at: http://www.glerl.noaa.gov/res/Programs/ncrais/
3) GLERL to Hire a Research Aquatic Biologist
Please help us broadly advertise this important new position...
Contact Dave Reid for more
information.
The following position vacancy is open until September 2. Dave
is looking for a recent Ph.D. in biology to work on a new study
of invertebrate resting egg response to various biocides, and to
assist with various aspects of my other ballast tank/aquatic invasive
species projects. Peter Landrum and Hank Vanderploeg are co-investigators
of the Resting Egg study.
POSTDOCTORAL AQUATIC (INVERTEBRATE) RESEARCH BIOLOGIST-GREAT LAKES
A Federal term appointment (GS-401-11; $49,968/yr) to work as part
of a team of scientists conducting research on invasive biological
organisms, their transport in ballast tanks, and their response
to various ballast tank management approaches. Position is with
the National Oceanic and Atmospheric Administrations (NOAA)
Great Lakes Environmental Research Laboratory (GLERL) in Ann Arbor,
MI, and assigned to the new NOAA National Center for Research on
Aquatic Invasive Species (http://www.glerl.noaa.gov/res/Programs/ncrais).
This is a two-year appointment pending satisfactory performance
and productivity during the first year.
The position will focus on laboratory and field-based studies of
resting eggs of various aquatic invertebrates and their toxicological
responses to selected biocides. Position also involves, to a lesser
degree, assessment of biological implications of ballast tank flow
dynamics based on outcome of models being developed in conjunction
with the Navy, research related to the biological implications of
ballast tank management practices, and participation in the development
of a nonindigenous species database for the Great Lakes. The incumbent
will also help develop proposals for new studies related to prevention
of aquatic species invasions. These studies will generally be focused
on the Great Lakes, but may be applicable to other coastal ecosystems.
Functional knowledge of aquatic invertebrate biology, basic oceanographic
and limnologic instrument use, field sample collection techniques,
microscopy, and laboratory culture methods, as well as familiarity
with aquatic toxicology and bioassay methods, statistical analyses,
and computer programming, are required. See the following GLERL
web sites for additional programmatic information: http://www.glerl.noaa.gov;
http://www.glerl.noaa.gov/res/Programs/nsmain.html.
Application MUST be made on-line through the Department of Commerce's
Commerce Opportunities On-Line (COOL) system at
http://www.jobs.doc.gov,
Announcement Number C-ERL-03010.SLW. Additional information and
requirements are contained in announcement. Application must be
received by Sept 2, 2003. Must be a United States citizen.
4) Ecological Forecasting Workshop
On August 5-6 GLERL hosted a workshop to help define Great Lakes
coastal constituencies and their ecological forecasting needs. 15
Sea Grant staff participated in the workshop, representing all programs
of the Great Lakes network except Lake Champlain and encompassing
an impressive array of expertise. Notes from the workshop will be
available shortly. Over the next several months I will be developing
a white paper, "Ecological Forecasting Needs of Great Lakes
Coastal Constituents", based on the discussions at the workshop
and follow-up with individual participants and others.
For more information, contact Rochelle.Sturtevant@noaa.gov
|
July 15, 2003
Many of the articles in this issue of GLERL Update are excerpted
from articles prepared for GLERL Notes, GLERL's inhouse newsletter...Thanks
to Laura Newlin and all the contributors.
Contents
1. NOAA Establishes National Center for Research on Aquatic Invasive
Species
2. GLERL Hosts NOAA Regionalization Workshop
3. GLERL Sponsors User Workshop on Ecological Forecasting
4. Deputy Assistant Secretary Tim Keeney visits GLERL
5. La Jolla, California Ocean Sciences Bowl Team Bound for the Great
Lakes
6. Great Lakes Odessey II: Restore the Greatness
7. Lake Michigan Field Station News
8. Invasive Zooplankton:GLERL Scientists Join Forces To Investigate
9. GLERL in the News - Water Levels
10. NOAA Great Lakes Seminar Series at GLERL - Analyses of Floc
Characteristics and Suspended
Particle Behavior
11. New Reprints
12. Staff News
GLERL Director to serve as OARs Acting Deputy Assistant Administrator
GLERL Gets Its First Deputy Director
Summer Fellows, Interns and Volunteers
_________________________________________________________________________
1. NOAA Establishes National Center for Research on Aquatic
Invasive Species
Excerpt from NOAA Magazine -- July 14, 2003
NOAA established a new NOAA National Center for Research on Aquatic
Invasive Species in Ann Arbor, Mich. The center will allow NOAA
to more effectively organize and coordinate its aquatic invasive
species research efforts while assuring that NOAA resources are
focused on priority problems nationwide, and where appropriate,
form partnerships with other agencies, academia and the private
sector.
"Each year, aquatic invasive species wreak billions of dollars
in damages on the U.S. economy, much of which is passed on to the
consumer", said retired Navy Vice Adm. Conrad C. Lautenbacher,
Ph. D. Undersecretary of Commerce for Oceans and Atmosphere and
NOAA Administrator. "If we are to effectively deal with this
threat, we must coordinate our science in order to provide the best
information and most appropriate ways to reduce the impact of invasive
species and stem their spread, or prevent introduction of new ones."
Under NOAA's plan, the agency's National Center for Research on
Aquatic Invasive Species will be established at the NOAA Great Lakes
Environmental Research Laboratory in Ann Arbor, Mich. Lautenbacher
said there were many reasons GLERL was selected, including:
- The lab's extensive in-house expertise, and proven 14-year track
record of conducting aquatic invasive species research, including
prevention, ecosystem impacts and forecasting, as well as monitoring;
- The network of collaborative partnerships that GLERL has developed
with universities, government agencies, and the private sector;
and
- The unique link that the lab has developed with the National
Sea Grant College Program through establishment of a GLERL / Great
Lakes Sea Grant Network Extension Agent.
Lautenbacher said the center will work across NOAA under the matrix
management approach he recently implemented throughout the agency.
Center director, David Reid, a senior physical scientist who has
served at GLERL since 1985, will develop programs and priorities
with a team representing the three units of NOAA that carry out
NOAA's marine science mission: NOAA Research, NOAA Ocean Service
and NOAA Fisheries. Reid will also be a member of NOAA's aquatic
invasive species matrix management team.
Stephen Brandt, acting deputy assistant administrator of NOAA Research
and GLERL director, said that the center will establish NOAA regional
coordinators in six major aquatic coastal regions around the United
States, ensuring that the coordination would be NOAA-wide and fully
national in scope. Since NOAA co-chairs the Aquatic Invasive Species
Task Force, the research identified by the center will be easily
coordinated with the research priorities identified by the task
force and the Invasive Species Council, Brandt said.
Lautenbacher noted that Canada's Department of Fisheries and Oceans,
the Canadian federal department with a mission closest to NOAA's,
expressed interest in the center when he described it during a visit
to Ottawa in May. In early June DFO indicated plans to develop a
similar Canadian Aquatic Invasive Species Research Centre and expressed
the desire to have the two centers work cooperatively. Brandt said
that GLERL's close proximity to Canada and its many interactions
with the Canadian scientific community will help develop links between
the NOAA Center and the new Canadian Centre sought by the DFO.
2. GLERL Hosts NOAA Regionalization Workshop
Twenty six participants representing five NOAA Line Offices and
16 programs/entities within the agency gathered at GLERL on June
3rd for a day-long workshop aimed at improving and deepening communication
and cooperation among NOAA line office components in the Great Lakes
region. The effort, one of five pilot programs, is being initiated
in response to NOAA Program Review Team (PRT) Recommendation 54
that NOAA develop a number of pilot regional coordination programs.
The purpose of such regional coordination will be to:
- Ensure that all NOAA employees are aware of each others
available products and services.
- Coordinate relevant activities to ensure one NOAA face to the
outside.
Regional Coordinators in key states or cities will work cooperatively
to identify opportunities for NOAA to achieve better recognition
of our corporate image. They will also help NOAA employees develop
regional projects with other NOAA programs.
The Great Lakes workshop featured a series of overview presentations
by various NOAA line office components in the region including the
National Weather Service (NWS), National Ocean Service (NOS), National
Environmental Satellite, Data, and Information Service (NESDIS),
the National Marine Fisheries Service (NMFS), the Office of Oceanic
and Atmospheric Research (OAR) and from NOAA headquarters. Following
the presentations, participants selected five members of a Great
Lakes Regional Steering Committee (one from each line-office) to
represent their respective line office and spearhead the coordination.
GLERL Director Stephen Brandt was selected as the overall NOAA Regional
Coordinator for the Great Lakes region. The remainder of the workshop
consisted of a brainstorming session and discussion to identify
specific steps to improve coordination and dissemination of the
corporate NOAA image to the public through the press and outreach
activities. Over 20 recommendations were made. The Regional Steering
Committee will be
responsible for implementing the recommendations.
For more information contact Steve Brandt (director@glerl.noaa.gov)
3. GLERL Sponsors User Workshop on Ecological Forecasting
Rochelle Sturtevant, GLERL / Regional Sea Grant Extension Specialist,
has organized an Ecosystem Forecasting workshop on August 5-6. GLERLs
science is now focused on Ecosystem Forecasting. Ecosystem Forecasting
provides timely and continuing predictions of the impacts of chemical,
biological and physical changes on ecosystems and ecosystem components
and can lead to better decisions, improve communications between
science and management, and help set science priorities. The purpose
of the workshop is to gain the user perspective on specific ecosystem
forecast products that could meet their needs and which could be
developed with current, repackaged or redirected GLERL research.
Sea Grant extension agents from across the Great Lakes basin have
been invited to attend.
We've had some cancellations - if you are interested in participating,
please contact Rochelle Sturtevant (Rochelle.Sturtevant@noaa.gov).
4. Deputy Assistant Secretary Tim Keeney visits GLERL
On June 10, 2003, Deputy Assistant Secretary of Commerce for Oceans
and Atmosphere, Tim Keeney visited the Great Lakes Environmental
Research Laboratory. During his visit Keeney gave a brief address
to the employees and officially announced the creation of a National
Center for Aquatic Invasive Species Research to be housed at and
administered by GLERL. Keeney also spent time meeting with GLERL
scientists involved with invasive species research and heard a presentation
given by Dr. Stephen Brandt highlighting the research and activities
being performed at the laboratory. Keeney has served in public and
private positions and has held environmental management and regulatory
positions, including NOAA general counsel, and director of Ocean
and Coastal Resource Management at the National Ocean Service. Currently
he is responsible for environmental policy, strategic planning and
program analysis and his responsibilities include crosscutting programs
such as coral reefs, climate, habitat restoration, and observation
systems.
5. La Jolla, California Ocean Sciences Bowl Team Bound for the
Great Lakes
Mike Quigley attended the National Ocean Sciences Bowl (NOSB) Finals
competition held at University California-San Diego and was on hand
to present the fourth place prize to a La Jolla High School (California)
NOSB team. As part of the 4th place award, the team will receive
an all expense-paid trip to the Great Lakes region that is provided
courtesy of GLERL, CILER, Michigan Sea Grant, and NOAAs National
Ocean Service.
The La Jolla team will fly to Alpena, Michigan on Wednesday, July
30th where they will board GLERLs Research Vessel Laurentian
for a research cruise on Thunder Bay in Lake Huron. They will then
travel to the Lake Michigan Field Station for briefings, lab tours
and visits to sites of interest through the August 2-3 weekend.
They return home on Monday August 4th.
6. Great Lakes Odessey II: Restore the Greatness
GLERL, USGS/GLSC, the Great Lakes Fishery Commission, the Great
Lakes Commission, and the Canadian Consulate General are co-hosting
a tour for Congressional staff August 12-14. The group will tour
the Buffalo-Niagara area (both sides of the border) to learn about
binational cooperation, Great Lakes research, aquatic invasive species,
areas of concern and Great Lakes Splendor. New York Sea Grant is
assisting with tour logistics and providing speakers for several
tour segments.
7. Lake Michigan Field Station News
With the field season well underway, the boats and station are
at capacity. The Muskegon River Project has brought a large group
of scientists and students to the field station.
Many of the winter projects on the R/V Laurentian were focused
on improving the science work spaces and resources. Monitors in
the remodeled wet lab provide sonar, navigation and closed circuit
video information to researchers. Tracklines and station locations
can be easily viewed, stored to CD or printed to hard copy. All
the old formica surfaces have been replaced with stainless steel
which have adjustable frames for securing instruments.
In April, U of M Naval Architecture students were provided an opportunity
to conduct maneuvering and sea keeping tests on the Laurentian.
The ship was fitted with instruments to measure motions in all six
degrees of freedom. Thirty stomachs and a tangle of instruments
measured the ships response in 5-7 foot seas.
Aside from the routine sampling cruises, we have deployed wave
gauges for the Army Corps of Engineers, assisted NOAAs National
Buoy Data Center with the repair of the southern basin buoy and
have begun to set mooring buoys in the NOS Thunder Bay Sanctuary.
We are also providing support to NOAAs Coast Survey group
for hydrographic work within the GL basin.
8. Invasive Zooplankton:GLERL Scientists Join Forces To Investigate
The introduction of two non-indigenous zooplankton, the spiny water
flea (Bythotrephes longimanus) and the fishhook water flea
(Cercopagis pengoi), has piqued the interest of GLERL scientists.
Over the past two years, Doran Mason, a GLERL fish ecologist, and
Hank Vanderploeg, a GLERL zooplankton ecologist, have joined forces
to better understand the impact of these species on Lake Michigan
fish and zooplankton communities. On his newfound involvement with
fish research, Hank commented, "Fish are very important in
the Great Lakes: they are responsible for killing millions of zooplankton
every year."
The major concern about both species is that they may compete with
small fishes, such as larval and young of the year (YOY) alewife
and perch, for zooplankton. Hank and post-doctoral researcher Radka
Pichlova have conducted feeding experiments to determine prey selection
and feeding rates of Cercopagis on different zooplankton, while
Doran and University of Michigan professor Ed Rutherford are directing
a field project of extensive sampling of zooplankton and larval
fishes in Lake Michigan and Muskegon Lake.
During the 2003 field season, Hank and Doran will be working together
to look at spatial distributions of zooplankton, particularly cercopagids,
and alewives through the simultaneous use of fish acoustics and
the Plankton Survey System (PSS). Dennis Donahue and Steve Ruberg
are providing technical assistance and expertise for these cruises.
Running the acoustics and PSS together will allow for the simultaneous
collection of data on thermal structure, chlorophyll, zooplankton,
and fish. Their hope is that this kind of data collection will provide
further insight into food-web impacts and interactions, as well
as provide more information on the spatial structure of the fish
and zooplankton communities of Lake Michigan.
9. GLERL in the News - Water Levels
Excerpt from - Great Lakes in Crisis: Chapter 4. Decreasing levels
impact everything from sport fishing to large shipping firms. By
Karena Walter. Wednesday, June 18, 2003. St. Catharine's Standard
http://www.stcatharinesstandard.ca/webapp/sitepages/content.asp?contentID=35314&catname=Local%20News
Most models that scientists use to predict water levels show an
overall drop as a result of global warming. The changing climate
causes the lake temperature to rise and some water to evaporate.
Scientist Brent Lofgren says lakes Michigan and Huron face the most
significant decreases one to 1½ metre drops over the
next century. The impact on Lake Erie is somewhat less and Lake
Ontario the least of all because it is regulated by canal locks.
But Lofgren, from the National Oceanic Atmospheric Administration
in Ann Arbor, Mich., says the predictions also show increased rainfall
over that time. The key question, he says, is which will outpace
the other evaporation or precipitation? The bottom
line is theres a lot of uncertainty.
10. NOAA Great Lakes Seminar Series at GLERL - Analyses of Floc
Characteristics and Suspended Particle Behavior
Speaker: Rajat K. Chakraborti, Ph.D. Candidate, Department of Civil,
Structural, and Environmental Engineering, State University of New
York at Buffalo, Buffalo, New York
Time: 10:30 a.m.
Location: GLERL, Main Conference Room
This seminar will not be recorded (unless I receive a specific
request - please give me at least a one week notice).
Abstract: In order to understand the transport and deposition of
suspended particles, experiments were performed to evaluate the
particle behavior under different physico-chemical conditions. Particle
size distributions and aggregate geometrical information at different
mixing times were obtained using a non-intrusive image analysis
technique. The time-varying measurements of floc size and structure
were used to determine collision efficiency and floc formation.
Changes in aggregate morphology with changes of aggregate properties
were evaluated using a fractal approach. The results showed that
the floc density decreases and floc porosity increases as floc size
increases. A fractal-based aggregate growth model was developed
and tested with the measurements. Multi-exposure camera images were
used to measure the settling rate of suspended particulate matter
and to investigate the orientation of suspended particles during
settling. It was found that particle structure and encased and pore
volume play a significant role in floc formation and the settling
behavior of aggregates. Information on suspended particle size and
structure in addition to the solids concentration are important
in the control and fate of nutrients and pollutants.
11. New Reprints
- BRANDT, S.B. and D. M. MASON. Effect of nutrient loading on
Atlantic menhaden (Brevoortia tyrannus) growth rate potential
in the Patuxent River. Estuaries 26:298-309 (2003).
- CROLEY, T.E. II, and C.L. Luukkonen. Potential effects of climate
change on ground water in Lansing, Michigan. Journal of the American
Water Resources Association 39(1):149-163 (2003).
- LOZANO, S.J, M.L. Gedeon, and P.F. LANDRUM. The effects of temperature
and organisms size on the feeding rate and modeled chemical accumulation
in Diporeia spp. for Lake Michigan sediments. Journal of Great
Lakes Research 29 (1):79-88 (2003).
- HAWLEY, N., and R.W. MUZZI. Observations of nepheloid layers
made with an autonomous vertical profiler. Journal of Great Lakes
Research 29(1):124-133 (2003).
- CLITES, A.H., and F.H. QUINN. The history of Lake Superior regulation:
implications for the future. Journal of Great Lakes Research 29(1):157-171
(2003).
- POTHOVEN, S.A., G.L. FAHNENSTIEL, and H.A. VANDERPLOEG. Population
characteristics of Bythotrephes in Lake Michigan. Journal of Great
Lakes Research 29(1):145-156 (2003).
- NALEPA, T.F., D.L. FANSLOW, M.B. LANSING, and G.A. LANG. Trends
in the benthic macroinvertebrate community of Saginaw Bay, Lake
Huron, 1987 to 1996: Responses to phosphorus abatement and the
zebra mussel, Dreissena polymorpha. Journal of Great Lakes Research
29(1):14-33 (2003).
- Ingersoll, C.G., E.L. Brunson, N. Wang, F.J. Dwyer, G.T. Ankley,
D.R. Mount, J. Huckins, J. Petty, and P.F. LANDRUM. Uptake and
depuration of nonionic organic contaminants from sediment by the
oligochaete, Lumbriculus variegatus. Environmental Toxicology
and Chemistry 22(3):872-885 (2003).
- Hook, T.O., E.S. Rutherford, S.J. Brines, D.M. MASON, D.J. SCHWAB,
M.J. McCORMICK, G.W. Fleischer, and T.J. DeSorcie. Spatially explicit
measures of production of young alewives in Lake Michigan: linkage
between essential fish habitat and recruitment. Estuaries 26(1):21-29
(2003).
- Kerfoot, W. C., S.L. Harting, R. Rossmann, and J.A. ROBBINS.
Elemental mercury in copper, silver, and gold ores: an unexpected
contribution to Lake Superior sediments with global implications.
Geochemistry: Exploration, Environment, Analysis 2:185-202 (2002).
12. Staff News
GLERL Director to serve as OARs Acting Deputy Assistant
Administrator
Stephen Brandt will be Acting Deputy Assistant Administrator for
NOAA Research from June 23 through July 31. This appointment continues
a series of rotations of Laboratory Directors to NOAA leadership
while the search for a new Assistant Administrator for NOAA Reasearch
continues. Cynthia Sellinger will be Acting Director of GLERL during
his absence.
GLERL Gets Its First Deputy Director
On May 4, 2003, Cynthia Sellinger became GLERLs first Deputy
Director. As Deputy Director, Ms. Sellinger assists the Director
in carrying out the day-to-day operations and functions of GLERL
to assure effective, efficient, and productive research programs
that are in keeping with government procedures, policies and priorities.
In addition, she assumes full responsibility and decision-making
authority in serving in an acting capacity for the Director
in his absence. More specific duties of the Deputy position include:
1) chairing the Management Council and developing GLERL policies
to contribute to the overall operating efficiency and effectiveness
of the Laboratory; 2) fully participating in the Science Council
to contribute to the overall scientific strategic planning of the
laboratory; and, 3) fully participating on the Partnership Council
to ensure the effectiveness of labor/management relations.A major
part of this position is to coordinate and develop responses to
NOAA for requests for information concerning managerial, personnel,
budget, and regulatory topics, working with the Director, the Administrative
Officer, the Safety Officer, and the Information Officer as necessary.
This also involves representing the Laboratory, and NOAA before
other Federal Agencies, the Congress, and constituent groups and
represent GLERL and the Director to external agencies and groups,
to NOAA HQ, and to other NOAA units. Cynthia is taking the lead
on several GLERL budget initiatives and is GLERLs primary
coordinator for the new building.
Ms. Sellinger joined GLERL in 1988 as a physical scientist. Her
research at GLERL included analytical studies of the hydraulic interaction
between the connecting channel and groundwater flows with water
levels of the Great Lakes. In 1998, she took on management responsibilities,
first being a team-leader for the Data Analysis team, next with
working 25% of Laboratory management issues, and then working full
time as Assistant to the Director. I am very happy to be GLERLs
Deputy Director, says Cynthia, Although it is a great
challenge for me, I really enjoy working with people and getting
the job done.
Summer Fellows, Interns and Volunteers
Raman Agrawal (MSU) working with Brent Lofgren.
Alexandra Belinky(UMichigan) working with Hank Vanderploeg.
Jarrod Dalton (UMichigan) working with Dave Schwab.
Elizabeth Graham (UMichigan) working with Stuart Ludsin.
Carrol Hand (Barnard College) working with Dave Reid.
Kirsti Huhta (St. Josephs College) working with Doran Mason.
Sarah Kolascz (Kalamazoo College) working with Ellen Brody at the
Thunder Bay Marine Sanctuary.
Leonard Kofman (UMichigan) working with Scott Peacor.
Tu-Van Le i(UFlorida) working with Doran Mason in Florida.
Jyoteshwar Nagol (UToledo) working with George Leshkevich.
Anna Ritchie (Hawaii Pacific U) working with Tom Nalepa.
Kirsten Rosenkrands (Kalamzoo College) working with Scott Peacor.
Jennifer Weller (Western Michigan U) working there with Tom Croley.
Jessica Blake (UMichigan - SNRE) working with Margaret Lansing.
Damon Krueger (UMichigan) working with Doran Mason.
Katie Marko (UMichigan - SNRE) working with Margaret Lansing.
Justin Mohammad Rahmani is a student volunteer working with Dave
Schwab.
Danielle Stark is a student volunteer working with Tom Nalepa.
|
June 18, 2003
Contents
1. NOAA Great LAkes Seminar Series at GLERL - Climate
2. GLERL to Host National Ocean Sciences Bowl Team Visit, July 30
- August 4
3. GLERL Update Feedback Request
1. NOAA Great LAkes Seminar Series at GLERL - Climate
With apologies, we have been experiencing some delay in posting
seminars to the web. Dr. Lippman's seminar was recorded and should
be posted as soon as we get the digital side running again.
Thursday, June 19, 2:30 pm
Observed Climate Variability and Change: Data Issues and Results
Speaker: Dr. David R. Easterling, NOAA's National Climatic Data
Center, Asheville, North Carolina
This seminar will be recorded for the web archive.
The Intergovernmental Panel on Climate Change Third Assessment
Report (TAR) states that the global climate has warmed approximately
0.6C over the past 100 years and there has been an increase in global
precipitation of about 1% per decade. These changes in climate are
examined in the context of data sets and research into observed
climate change produced at the National Climatic Data Center (NCDC).
Furthermore, variations and trends in extreme climate events have
only recently received much attention. Exponentially increasing
economic losses, coupled with an increase in deaths due to these
events, have focused attention on the possibility that these events
are increasing in frequency. One of the major problems in examining
the climate record for changes in extremes is a lack of high quality
long-term data. In this talk we examine a number of data sets data
sets produced at the National Climatic Data Center which include
the Global Historical Climatology Network, Global Daily Climatology
Network (GDCN) data set, blended ocean/land air temperature data
and recently digitized daily data for the USA from the first half
of the 20th Century. We also examine results from research using
these and other data to examine variability and trends in climate
mean quantities and climate extremes. These include changes in temperature
extremes, such as frost days, and changes in days above and below
various percentile thresholds. We also examine results from analyses
examining the relationship between observed increases in heavy precipitation
and streamflow in the USA. Selected results include an observed
decrease in frost days (days with the minimum temperature below
0C), and lengthening of the frost-free season in most parts of the
USA.
For more information, contact:
Dr. Brent Lofgren (NOAA/GLERL)
brent.lofgren@noaa.gov
734-741-2383
2. GLERL to Host National Ocean Sciences Bowl Team Visit, July
30 - August 4
Five students and a teacher from La Jolla High School, La Jolla
California will have a first-hand opportunity to learn about Great
Lakes science, history, and environmental issues as part of a tour
that will take them to GLERL's Lake Michigan Field Station, Muskegon,
Michigan and Lake Huron's Thunder Bay National Marine Sanctuary
and Underwater Preserve, Alpena Michigan.
The La Jolla group comprised the National Ocean Sciences Bowl team
that finished in fourth place during the final competition of the
National Ocean Sciences Bowl held in San Diego, California, April
27-28. As the fourth place prize, the Great Lakes trip will include
a research cruise on Lake Huron onboard GLERL's Research Vessel
Laurentian, lab tours and briefings at the lab's Lake Michigan Field
Station and related educational and recreational activities.
Team members include Adela Dominique Rahmati, Amy Liao, Drew Lambert,
Lisl Eshrick, and Marwa Kaisey. Team coach, Lee Decker teaches advanced
biology and ocean sciences at La Jolla High School.
The team will fly to Alpena, Michigan on Wednesday, July 30 for
the Laurentian research cruise on Thursday, July 31. On Friday,
August 1st, the team will travel through northern Michigan with
stops at areas of interest to learn about watershed ecology and
history. From there, they will travel to the Lake Michigan Field
Station in Muskegon for the remainder of their stay, returning home
on Monday, August 4th.
3. GLERL Update Feedback Request
The GLERL Update has been published on an ad hoc basis since September
2001 with the intent of providing information about GLERL activities
to Sea Grant staff scattered across the Great Lakes basin. Your
feedback is needed to help ensure that the newsletter is meeting
your information needs. Please take a few minutes to respond with
your comments (just hit reply! - not reply all). Food for thought...
- Is the newsletter length appropriate?
- Is it timely?
- Which types of articles would you like to see more of? Less
of?
- Are there other types of information/articles you would like
to see included in this newsletter?
|
May 28, 2003
Contents
1. NOAA Great Lakes Seminar Series at GLERL
2. AQUATIC NUISANCE SPECIES SYMPOSIUM
3. From NOAA Headquarters: New Program Manager for the NOAA Research
Joint Institute
(including CILER)
4. Steve Brandt to be Acting Deputy Assistant Administrator at OAR
Headquarters
5. Great Lakes ANS List On-line
6. GLERL in the News: Lake Levels
7. GLERL Hot Items - Great Lakes Issues Workshop
8. GLERL Hot Items - Aquatic Invasive Species / Other Research Topics
at Rouge River Festival
__________________________________________________________________________
1. NOAA Great Lakes Seminar Series at GLERL
Seminar Schedule at http://www.glerl.noaa.gov/news/seminars/
Seminar Video Archive at http://www.glerl.noaa.gov/news/seminars/pastseminars.html
Thursday, May 8 "A Changing Lake Erie Fish Community: Unraveling
the Mechanisms Involved" Speaker: Dr. Stuart A. Ludsin, NOAA/GLERL,
Ann Arbor, Michigan. VIDEO ARCHIVE AVAILABLE: ftp://ftp.glerl.noaa.gov/webcast/2003/ludsin/20030508.wmv
Tuesday, May 13 The Importance of the Microbial Food Web
in C- and P- Transport through the Base of Great Lakes Food Webs
Speaker: Dr. Robert T. Heath, Kent State University, Kent, Ohio.
Archive anticipated shortly.
Thursday, May 29 "Beach Profiles Along Lake Erie" Speaker:
Dr. Tom Lippmann, Ohio State University, Byrd Polar Research Center,
Columbus, Ohio. Seminar will be recorded for the archive.
Monday, June 2, Noon at GLERL. "Characterization of Hydrodynamics
using HGM and Ecoregions in Southeastern, Michigan " Speaker:
David H. Merkey, M.L.A, CILER, University of Michigan. Please request
of Rochelle Sturtevant if you would like this seminar recorded.
Monday, June 2, 3-5pm. Location: Room 1040 Dana Bldg, 430 East
University Ave., University of Michigan, Ann Arbor. Featured keynote
presentation for the University of Michigan's Symposium on Aquatic
Nuisance Species Research. (A reception will follow in the Dana
Commons.) "Predicting the Occurrence and Impact of Species
Invasions in the Great Lakes" Speaker: Dr. Anthony Ricciardi,
Redpath Museum & McGill School of Environment, McGill University,
Montreal. CILER plans to record this seminar, it may be available
through the GLERL web archive (if formats are compatible).
2. AQUATIC NUISANCE SPECIES SYMPOSIUM - Monday / June 2,
2003 / 3-5 pm
The State of Michigan has declared May 31 through June 7, 2003
"Aquatic Nuisance Species Awareness Week" to raise awareness
about prevention and control of aquatic nuisance species (ANS) in
Michigan and Great Lakes waters. In observance of Aquatic Nuisance
Species Awareness Week, the School of Natural Resources and the
Environment at the University of Michigan will host a Symposium
on Aquatic Nuisance Species Research on Monday, June 2, from 3-5
pm in room 1040 Dana Bldg. on the University of Michigan's central
campus. A reception will follow in the Dana Commons.
Program
- Opening Remarks by Symposium Moderator Thomas Johengen (Director,
Cooperative Institute for Limnology and Ecosystems Research).
- Welcoming Remarks by David Allan, Interim Associate Dean, School
of Natural Resources and the Environment.
- Panel Presentations (10 minutes each)
- Ken DeBeaussaert (Director, State of Michigan Office of
the Great Lakes)
- Doran Mason (Scientist, NOAA/Great Lakes Environmental Research
Laboratory)
- John Schwartz (Program Leader, Michigan Sea Grant College
Program)
- Great Lakes Commission (Invited)
- Keynote Lecture "Predicting the Occurrence and Impact of
Species Invasions in the Great Lakes," Anthony Ricciardi
- Question and Answer Period with Speaker and Panelists
- Reception
Displays by the Michigan Sea Grant College Program, the University
of Michigan School of Natural Resources and the Environment, the
State of Michigan Office of the Great Lakes, the NOAA/Great Lakes
Environmental Research Laboratory, the U.S. Fish & Wildlife
Service, and the U.S. Geological Survey Great Lakes Science Center
(invited) can be viewed in the Dana Commons prior to the symposium
and during the reception.
Directions to the Dana Building are available on the SNRE web site.
http://www.snre.umich.edu/about-snre/visitor-information.html
For more information contact:
Colleen Vogler, CILER, 734-764-2426, http://www.ciler.org
David Reid, NOAA/GLERL, 734-741-2019
3. From NOAA Headquarters: New Program Manager for the NOAA
Research Joint Institute (including CILER)
Beginning May 1st, Dr. John Cortinas became the interim Program
Manager for the NOAA Research Joint Institute (JI) Program. He has
already relocated to NOAA Research headquarters in Silver Spring.
John replaces Marilyn Moll, who devoted a large part of her government
career to this position. Marilyn will continue to work with OAR
and NESDIS to help establish JIs within NESDIS.
As part of the effort by NOAA Research to continue improving the
JI program, it was decided to relocate the Program Manager position
back to Silver Spring and increase the responsibilities of this
position. These changes will produce several benefits for NOAA Research
headquarters, the Laboratories, and the JIs. The primary benefit
will be the location of someone at NOAA Research headquarters that
understands the JI program and can quickly and efficiently interact
with organizations in the Washington area, such as the NOAA Research
executive management, DOC Legal Counsel, NOAA executive management
and the NOAA Grants Office.
Effective immediately, the JI Program Manager will be the primary
headquarters contact for all JI issues. John can be reached at 301-745-2465
ext:206.
John has extensive JI and NOAA experience that will contribute
to continuing the success of this program. Prior to the NOAA Research
position, John served as the Assistant Director for the Cooperative
Institute for Mesoscale Meteorological Studies (CIMMS) at the University
of Oklahoma for the previous two years and as a research scientist
at CIMMS since 1992. John also gained valuable knowledge about the
federal system by being located at NSSL, where he interacted with
the NSSL management team extensively. His experiences in the federal
system, the university system, and scientific research will be an
asset to this program.
4. Steve Brandt to be Acting Deputy Assistant Administrator
at OAR Headquarters
GLERL Director Dr. Steve Brandt will be Acting Deputy Assistant
Administrator in Washington D.C. from June 22 through July 31. This
is part of a series of rotations by OAR lab directors to cover OAR
headquarters while a search for a new Assistant Administrator for
OAR continues. Louisa Koch is expected to return as Deputy on 1
August. During this period Cynthia Sellinger will be Acting Director
of GLERL.
5. Great Lakes ANS List On-line
A list of the 162 aquatic nonindigenous species documented in the
Great Lakes by Mills et al (1993) and Ricciardi (2001) is now available
on the web at: http://www.glerl.noaa.gov/res/Programs/invasive/
A link for additional information about each species is included
if available and will be updated as we find more. Additional species
will be added as they are identified and confirmed in published
peer-reviewed literature, or for which we have reliable professional
confirmation that can be cited. We plan to convert the list to an
expanded searchable database with room for much more information
later this year.
Comments, corrections, suggestions, and queries can be sent to:
GreatLakes.ANS@noaa.gov
6. GLERL in the News: Lake Levels
Excerpt from Boating season thrives despite low lake levels By
Tim Keenan / The Detroit News
Despite water levels on Lake St. Clair that are a foot-and-a-half
below average, Macomb County marinas from Harrison Township to St.
Clair Shores are doing booming business. That's because experienced
boaters are shrugging off the difficulties they're facing in trying
to get to open water. Still, the shrinking lake levels could imperil
a local boating industry that, when healthy, is worth millions of
dollars to the Macomb County economy, from St. Clair Shores to north
of Selfridge Air National Guard Base.
The dropped levels forecast by the Great Lakes Research Laboratory
and the U.S. Army Corps of Engineers come amid other challenges
for Macomb boaters, including fluctuating fuel prices and iffy weather.
The water level can help or hurt a boating season, said Cynthia
Sellinger, a hydrologist at the Great Lakes Research Laboratory
in Ann Arbor. She expects Lake St. Clair to be 17 inches below average
through fall. The main impact of low water levels is people getting
in and out of their boat slips, Sellinger said. "Once they
get out, they're OK," she said. "The big freighters are
having some problems navigating in these conditions, but not boaters."
Michigan's receding lake levels will eventually mean higher prices
for products that travel by freighter, such as salt. "For every
inch of water (the shippers don't have), they have to carry 100
less tons. So if we're down eight, nine, 10 inches, we're looking
at 1,000 tons (less)," said Dean Haen, port director of the
Port of Green Bay, which gets its salt from Detroit freighters.
"That's 7 percent less cargo per ship."
After low water levels, "the weather is the second-biggest
variable" to having a successful boating season in Macomb,
said Mike LeFevre, owner of Jack's Waterfront Restaurant in St.
Clair Shores. "Last year was a fabulous year because there
was only one full weekend of rain."
7. GLERL Hot Items - Great Lakes Issues Workshop
On January 20 21, 2003 the NOAA Center for Sponsored Coastal
Ocean Research (CSCOR), NOAA Great Lakes Environmental Research
Laboratory (GLERL), and the Cooperative Institute for Limnology
and Ecosystems Research (CILER) co-hosted a Great Lakes Issues Identification
Workshop at the University of Michigan in Ann Arbor.
The focus of this workshop was to identify major issues within
the Great Lakes compatible with CSCORs goals and mission and
to providescientific information to assist decision makers in meeting
the challenges of managing our nation's coastal resources.
Based on data collected over the past few years, the participants
at the workshop agreed that new and continuing water quality and
ecosystem health issues persist within the lakes and remain a challenge
to managers.
Over the past 15 years the rate of species invasion into the Great
Lakes has accelerated with substantial impacts on food webs and
cycling of nutrients. The benthic food web and associated processes
are very different from the 1980s and earlier. The most obvious
example of these changes resulted from the introduction of zebra
mussels (Dreissena polymorpha) in the early 1990s. They fundamentally
altered energy transfer and nutrient cycling in the lakes and have
been identified as a primary cause of the appearance of hazardous
algal blooms of Microcystis, increased depletion of oxygen, and
increased water clarity with resultant blooms of benthic macrophytes,
such as Cladophora.
The strategy developed to manage the lakes by titrating phosphorus
loads to set levels of chlorophyll did not anticipate or include
alteration of key processes in this ecosystem.
Given these recent perturbations and changes in community structure,
the nutrient management strategy for the Great Lakes needs to be
reexamined from a total ecosystem perspective. The models used in
the 1970s to set nutrient input levels were first generation, but
proved successful in forecasting lake response into the 1990s. Some
recent data may imply that lake phosphorus concentrations are diverging
from predictions.
We now have a better understanding of how ecosystems work and need
to improve the models by adding better physics, refined chemical
and biological processes, incorporate the upper food chain, and
importantly add new ecological components which were not present
in the 1970s. Improved hydrodynamic models are now able to provide
reliable information on lake circulation, transport of nutrients,
and system-wide thermal structure
The importance of episodic events, land-lake coupling, and fundamental
changes in nutrient dynamics and food webs need to be incorporated
into a next generation of lake management tools. Concurrently, the
validity of state-of-the-art models needs to be evaluated to test
the validity and robustness of their outputs.
This can be done in hindcast and forecast modes. Extensive databases,
derived from research and monitoring programs that often extend
back into the 1970s, can be used to test hindcast simulations. Furthermore,
reasonably good meteorological data from approximately the past
50 years is available to drive circulation and thermal simulations.
Recommendations
The consensus of this workshop is that a new concerted research
effort is needed to examine then impacts of recent ecological changes
in the Great Lakes on water quality. Key questions include:
-- Have recent ecosystem changes compromised eutrophication controls?
-- What are the connections between water quality and undesirable
ecosystem events such as taste and odor problems, harmful algal
blooms, hypoxia, and fish die-offs.
-- What are the impact of landscape changes on material fluxes across
the land-lake interface.
-- What is the effect of the benthic community on nearshore-offshore
cycling and transport of materials.
-- What are the roles of physical processes (episodic events, interannual
variability, and climate change) on basin ecology.
The Great Lakes ecosystem is the most clearly definable regional
entity under NOAAs purview and mission responsibilities, contains
a suite of environmental stresses common to all coastal systems,
and has a long history of bi-national and interagency partnerships
and collaborations. Thus, the Great Lakes have the greatest potential
for success in testing any regional approaches and for the development
of ecosystem forecasting tools.
Complete copies of the workshop report have been posted to the
web sites
http://www.glerl.noaa.gov/eegle/products/COP_workshop_2003
and http://www.ciler.org/news.
More information:
http://www.glerl.noaa.gov/eegle/products/COP_workshop_2003
Contact information: Brian J Eadie (734) 741-2281 Brian.J.Eadie@noaa.gov
8. GLERL Hot Items - Aquatic Invasive Species / Other Research
Topics at Rouge River Festival
GLERL and Michigan Sea Grant partnered in a presentation at the
2003 Rouge River Water Festival on May 2, 2003 at the Dearborn Campus
of the University of Michigan. The Rouge River Water Festival is
an daylong event for 5th grade classes from the Detroit area.
The annual festival typically draws nearly 3,000 students (100+
classes from 50+ schools), many from the inner-city Detroit region.
Last year GLERL and Sea Grant partnered in producing an interactive
exhibit for the festival, this year we opted for the more in-depth
opportunities provided through the presentation format.
Rochelle Sturtevant, the Great Lakes Sea Grant Extension Agent
at GLERL, organized the joint hands-on presentation which was delivered
by Nancy Morehead (GLERL technical staff), John Schwartz (MI Sea
Grant Extension Program Leader) and Steve Stewart (MI Sea Grant
educator).
The presentation included a variety of topics relating to the Great
Lakes including lake bathymetry, meteorological data, waterlife
and exotic species. Students particularly enjoyed the Great Lakes
quiz board, looking at live organisms on the video-microscope, Great
Lakes wave animations and looking at preserved specimens of alien
invaders.
|
April 11, 2003
Contents
1. NOAA Great Lakes Seminar Series at GLERL - Benthic Algal Community
2. NOAA Great Lakes Seminar Series at GLERL - Upcoming Seminars
3. GLERL Fact Sheets On-Line
4. New Way to Access GLERL Publications
5. New Reprints - Ice, Diporeia, Resuspension, Fish
1. NOAA Great Lakes Seminar Series at GLERL - Benthic Algal
Community
Functional and Structural Shifts in the Near-Shore Algal Community
of the Great Lakes: The Response to Exotic Mussels.
Speaker: Dr. Rex L. Lowe, Department of Biological Sciences, Bowling
Green State University, Bowling Green, OH
VIDEO ARCHIVE AVAILABLE: Low Resolution:
ftp://ftp.glerl.noaa.gov/webcast/2003/Lowe-03-25/20030325-small.wmv
High resolution: (dowload only between 5pm and 8am!):
ftp://ftp.glerl.noaa.gov/webcast/2003/Lowe-03-25/20030325.wmv
The video archive has now been streamlined into the main GLERL
seminars page. For complete access to recorded seminars, see http://www.glerl.noaa.gov/news/seminars/pastseminars.html
2. NOAA Great Lakes Seminar Series at GLERL - Upcoming Seminars
Tuesday, April 22 "Ecological Forecasting" Dr. Don Scavia,
NOAA
Thursday, May 8 "A changing Lake Erie fish community: unraveling
the mechanisms involved" Dr. Stuart A. Ludsin, GLERL
Tuesday, May 13 The importance of the microbial food web
in C- and P- transport through the base of Great Lakes food webs
Dr. Robert T. Heath, Kent State University, Kent, Ohio
Thursday, May 29 "Beach profiles along Lake Erie" Dr.
Tom Lippman, Ohio State University, Columbus, Ohio
3. GLERL Fact Sheets On-Line
GLERL's web page for Print-on-Demand fact sheets has been revised.
It isn't as pretty as before, but it loads a lot faster and all
the newest versions of the fact sheets (including all the ANS ones
that Sea Grant folks helped review last fall) are there now. http://www.glerl.noaa.gov/pubs/brochures/
4. New Way to Access GLERL Publications
Research by Researcher (http://www.glerl.noaa.gov/res/Profiles/)
- Directory organized by researcher with interest areas links to
a research profile and a listing of all publications by that researchers.
Updated approximately every six months.
Research publications can also be accessed by chronological listing
at http://www.glerl.noaa.gov/pubs/.
Research for select topic areas (Fisheries, ANS, Climate Change
and Contaminants) can be accessed at
http://www.glerl.noaa.gov/seagrant/Publications/reprints.htm
as can many of those too recent for inclusion in the six-month updates.
5. New Reprints - Ice, Diporeia, Resuspension, Fish
Contact Cathy Darnell
for copies.
Assel, Cronk and Norton. 2003. Recent trends in Laurentian Great
Lakes ice cover. Climactic Change 57:185-204
Landrum, Lotufo, Gossiaux, Gedeon, and Lee. 2003. Bioaccumulation
and critical body residues of PAHs in the amphipod Diporeia spp.:
additional evidence to support toxicity additivity for PAH mixtures.
Chemosphere 41:481-489.
Peacor. 2003. Phenotypic modifications to conspecific density arising
from predation risk assessment. Oikos 100(2)409-415.
Miller, McCormick, Saylor, Murthy and Rao. 2002. Temporal and spatial
variability of the resuspension coastal plume in southern Lake Michigan
inferred from ADCP backscatter. Verh. Internat. Verin. Limnol. 28:513-518.
Mora, Chittaro, Sale, Kritzer, and Ludsin. 2003. Pattern and processes
in reef fish diversity. Nature 42:933-936.
6. New Fact Sheet - Ice Cover
"Great Lakes Ice Cover - Winter 2003 compared with GLERL's
30-Winter Ice Cover Climatology" available print-on-demand
(PDF or HTML) at
http://www.glerl.noaa.gov/pubs/brochures/ This new 1-page fact
sheet graphically illustrates the severity of this spring's ice
cover.
|
April 1, 2003
Contents
1. NOAA Great Lakes Sem | |