Special Session Abstracts SS31-SS46
Sessions 01 - 15 | Sessions
16 - 30 | Sessions
31 - 46
SS31 - Influence of primary
producers on nutrient cycling in coastal marine areas
Søren Laurentius Nielsen (nielsen@virgil.ruc.dk),
Morten Foldager Pedersen (mfp@virgil.ruc.dk),
Gary T. Banta (banta@virgil.ruc.dk),
Department of Life Sciences and Chemistry, Roskilde University,
PO Box 260, DK-4000 Roskilde, Denmark. Fax: +45 46 74 30 11
It is often claimed that different types of primary producers dominate
habitats of different nutrient loading, so that seagrasses and slow-growing
macroalgae dominate in pristine, nutrient-poor, areas while increasing
nutrient richness leads to dominance by fast-growing macroalgae and
phytoplankton. In this session, we would like to ask the questions:
How does dominance by different types of primary producers affect
nutrient cycling in coastal marine areas? How is remineralization
of different primary producers affected by grazing and decomposition?
Finally: does this affect loss processes such as denitrification and
permanent burial of nutrients in the sediment?
SS32 - High Resolution Studies of Biogeochemical
Processes in Estuaries
James McManus (jmcmanus@d.umn.edu),
Large Lakes Observatory, University of Minnesota, Duluth, MN 55812
Gary P. Klinkhammer (gklinkhammer@oce.orst.edu),
College of Oceanic and Atmospheric Sciences, Oregon State University,
Corvallis, OR 97331-5503.
Estuaries are some of the most dramatic boundaries on Earth. Estuaries
are dynamic chemical, biological, and physical systems that experience
rapid changes over relatively small spatial scales as compared to
either rivers or the ocean. These changes ultimately exert a major
influence over the chemistry and biology of the near-continent ocean.
For this session, we specifically seek abstracts that focus on biogeochemical
processes in estuaries. The session will be broad in scope, but it
is anticipated that abstracts will focus on either temporal studies,
with resolution ranging from tidal to seasonal, or high resolution
spatial studies, where large data sets are used to address biogeochemical
problems.
SS33 - Coastal embayments as important land-margin
ecosystems: Fate and transformations of reactive nutrients
Karen J. McGlathery (kjm4k@virginia.edu),
Department of Environmental Sciences, Clark Hall, University of
Virginia, Charlottesville, VA 22903, Phone: 1-804-924-0558, Fax: 1-804-982-2137
Iris C. Anderson (iris@vims.edu),
School of Marine Science, College of William and Mary, Gloucester
Point, VA 23062, Phone: 1-804-684-7242
Shallow coastal lagoons and bays are a major type of land-margin ecosystem
on most continents, yet the retention and transport of nutrients through
these systems have received far less attention than in large estuaries.
Papers are invited that focus on the links between the ecological,
biogeochemical, and physical processes that govern the reponse to
and recovery from nutrient enrichment, and the extent to which shallow
lagoons act as a "filter" for terrestrial nutrient inputs.
SS34 - Biochemistry of food quality in relation
to production across pelagic systems
Sigrún H. Jónasdóttir (sjo@dfu.min.dk),
Danish Institute for Fisheries Research, Department of Marine and
Coastal Ecology, Kavalergaarden 6, DK-2920 Charlottenlund, Denmark.Fax:
+45 33 96 34 34
Wim C.M. Klein Breteler (wkb@nioz.nl),
Netherlands Institute for Sea Research, P.O. Box 59, 1790 AB Den
Burg, Texel, Netherlands. Fax: +31 222 31 96 74
Food quality is known to be one of the major factors controlling secondary
production in the aquatic environment. However, a knowledge of what
food quality specifically is has for the longest time been limited.
The field of aquaculture has had a leading role in investigating effect
of food quality for growth of various aquatic animals and the current
knowledge of those studies have for the last decade slowly been seeping
into freshwater and marine studies. This session concentrates on one
aspect of food quality: biochemical composition, such as specific
lipids, fatty acids, sterols, amino acids, vitamins and their role
in growth and development of micro/ and mesozooplankton. Studies from
oligotrophic through to eutrophic systems are of interest, both in
fresh/ and marine environments, as well as experimental studies simulating
these conditions.
SS35 - Small-scale physical-biological interactions
in the plankton (invited)
Thomas Kiørboe (tk@dfu.min.dk),
André Visser (wv@dfu.min.dk), Danish
Institute for Fisheries Research, Charlottenlund Castle, DK-2920 Charlottenlund,
Denmark. Tel: +45 33 96 34 01, Fax: +45 33 96 34 34
The adaptations of planktonic organisms, from vira and bacteria to
larval fish, can be understood only in the context of the physical
and chemical environment in which they live. Nutrient uptake, motility
patterns, feeding and encounter rates, signal transmission and perception
are all constrained by often non-intuitive interactions between organism
biology and small-scale physical and chemical characteristics of fluid
media (e.g. viscosity, fluid motion, diffusion). This session focusses
on attempts to understand such interactions and on their implications
to pelagic food web structure (trophic interactions, vertical fluxes).
SS36 - Physical and chemical influence on the
life histories of marine and freshwater organisms: The consequences
of environmental change
Stanley I. Dodson (sidodson@facstaff.wisc.edu),
James Gillooly (gillooly@students.wisc.edu),
Zoology Dept., Birge Hall, University of Wisconsin, 430 Lincoln
Drive Madison, WI. FAX: 608-265-6320
The physical and chemical attributes of aquatic systems around the
world are changing in the face of human-induced environmental change.
To understand the consequences of such changes on the ecological integrity
of aquatic systems, we must understand how these physical and chemical
changes affect the basic life histories of aquatic organisms. For
example, physical changes in the thermal structure of water bodies
caused by urbanization or global warming may alter zooplankton life
history processes important to survival and reproduction. Similarly,
there is overwhelming evidence that chemical contamination from anthropogenic
sources is altering fundamental life history processes in aquatic
systems.
SS37 - Spatial and temporal scales controlling
plankton dynamics
Hans W. Paerl (hans_paerl@unc.edu)
University of North Carolina at Chapel Hill, Institute of Marine
Sciences, Morehead City, NC 28557 USA
Kaisa Kononen (kaisa.kononen@nessling.fi),
Maj and Tor Nessling Foundation, 00260 Helsinki, Finland
Variations in plankton communities result from small-scale biogeochemical
processes that are modified by climatological, seasonal, meteorological
and hydrodynamic forces. In the fields of meteorology, physical limnology
and oceanography, examination of fluctuations in time and space have
been made using spectral analysis of large databases leading to a
classification with variability scales. Meanwhile, biologists have
mainly focused on small-scale (i.e., microns to cm, minute to hours)
processes. During the past few decades, the evidence of the strong
impact of physical forcing on plankton dynamics has emerged in the
marine and freshwater ecological literature. Concurrently, limnologists
and biological oceanographers are facing societal demands to extrapolate
their results for predicting changes on ecosystem, regional and global
scales. This progress makes identification and integration of a range
of relevant spatial and temporal scales unavoidable in comparative
studies of freshwater and marine plankton dynamics. This session will
provide the opportunity to synthesize the roles and impacts of spatial
and temporal scales in the context of environmental controls of planktonic
productivity, biodiversity and function.
SS38 - Biological, chemical, physical and sedimentological
interactions in polynyas
Louis Legendre (louis.legendre@bio.ulaval.ca),
Department of Biology, Laval University, Quebec, QC G1K 7P4, Canada.
FAX: +1 418 656 2339; TEL: +1 418 656 5788
Heidemarie Kassens (hkassens@geomar.de),
Forschungszentrum GEOMAR, Wischhofstr. 1-3, D-24148 Kiel, Germany.
TEL and FAX: +49 431-600-2850
Polynyas are areas of open waters in the polar ice pack. The physical
processes responsible for the opening of polynyas, i.e. the influx
of (sensible) heat or/and winds (latent heat), determine the physical
and hydrodynamic characteristics of polynyas. These largely govern
the biological and chemical processes within and downstream of polynyas,
that are reflected in the benthos and sediments. The session will
explore biological, chemical, physical and sedimentological interactions
in both Arctic and Antarctic polynyas.
SS39 - Benthic filter-feeding and plankton dynamics-
importance of currents and mixing
Hans Ulrik Riisgaard (hur@biology.ou.dk),
Research Centre for Aquatic Biology, Odense University, Hindsholmvej
11, DK-5300 Kerteminde, Denmark. Tel/fax: +45 6532 1433.
Josep-Maria Gili (gili@icm.csic.es),
Dept. Marine Biology, Institut de Ciències del Mar (CSIC), Plaça
del Mar s/n, 08039 Barcelona, Spain. Phone: 34 93 2216416, Fax: 34
93 2217340
Filter-feeding, benthic macroinvertebrates are important components
in coastal ecosystems where they remove suspended food particles from
the water. They dwell in the boundary zone between substratum and
water column where they comform an extremely active part of the system,
exploiting production from the water column transported by current
flows. A key to the understanding of spatial and temporal variations
in pelagic biomass is knowledge of the circumstances under which filter
feeding takes place. Until now it has often been disregarded that
both large and rapid variations in phytoplankton biomass in shallow
coastal waters and fjords are likely to be the results of a complicated
interplay between hydrography and filter-feeding benthos. Knowledge
about the interactions between currents, wind- and biomixing, density-driven
circulation, and filter feeders, may explain otherwise unaccountable
large variations in the plankton biomass. Such insight is of great
importance for a general basic understanding of the dynamics in coastal
ecosystems.
SS40 - Bioturbation: the water-sediment interface
is under control
Franck Gilbert (gilbert@com.univ-mrs.fr),
Georges Stora (stora@com.univ-mrs.fr),
Laboratoire d'Oceanographie et de Biogeochimie (UMR CNRS 6535), Centre
d'Océanologie de Marseille, Campus de Luminy - Case 901, F-13288 Marseille
Cedex 9, France. Fax: +33 4 91 82 65 48
Among the different aquatic interfaces, the water-sediment boundary
is the most biota-influenced interface. The different activities of
meio-, macro- and mega-benthos (e.g. burrowing, bio-irrigation, faeces
deposition) modify the characteristics of the sediments with major
effects as on the solutes exchanges between the porewater and overlying
water. The knowledge of the different aspects and effects of bioturbation
on the physical, chemical and biological properties of the sediments
are thus indispensable to understand and model the processes at the
sediment-water interface.
SS41 - Chemical ecology of the freshwater and
marine benthos
Elisabeth M. Gross (Elisabeth.Gross@uni-konstanz.de),
Limnological Institute, Faculty of Biology University of Konstanz,
P.O. Box 5560 X913, D-78457 Konstanz, Germany. Phone +49 7531 88 3112,
Fax +49 7531 88 4136
Mark Hay (mark.hay@biology.gatech.edu),
School of Biology, Georgia Institute of Technology, Atlanta, GA
30332-0230. Phone: +1 404-894-8429, FAX: +1 404-894-0519
Bioactive metabolites play critical roles in affecting species interactions
in aquatic communities. Activity appears to be higher in benthic than
pelagic systems, potentially due to the high densities of interacting
species in the benthos. Biofilms and microbial mats frequently exhibit
allelopathic activity; and macroalgae and macrophytes commonly employ
chemical defenses against both herbivores and fouling organisms. Researchers
rely heavily on ecologically appropriate bioassays that parallel field
situations. Presentations of field and laboratory investigations are
invited to stimulate discussion of the status, opportunities, and
challenges in this field. Attention will be focused on comparing ecological
and evolutionary processes between marine and freshwater systems.
Potential contributors should not hesitate to contact the convenors.
SS42 - The microbial ecology and biogeochemistry
of aquatic sediments
Bo Thamdrup (bot@biology.ou.dk),
Kirsten Habicht (khabicht@biology.ou.dk),
Danish Center for Earth System Science, Inst. of Biology, SDU Odense
University, Campusvej 55, DK-5230 Odense M, Denmark. Fax: +45 65 93
04 57
John W. Morse (morse@astra.tamu.edu),
Texas A&M University, Eller O&M Rm. 502, College Station,
Texas 77845. Fax: +1 409 845 9631
We seek contributions crossing the boundary between the fields of
benthic biogeochemistry and microbial population ecology. Contributions
should combine investigations of bacterial community size and structure
with determination of rates and pathways of biogeochemical processes.
Specific topics could include: Identification of metabolically active
microbes, competition between natural microbial populations, population
dynamics and their regulation by environmental factors (e.g. sedimentation,
bioturbation, temperature), novel types of microbial metabolisms and
their biogeochemical significance, and microbial control on rates
and pathways of carbon mineralization.
SS43 - Oxic-anoxic boundary phenomena
Peter Casper (pc@igb-berlin.de),
Institute of Freshwater Ecology and Inland Fisheries, Department
of Limnology of Stratified Lakes, Alte Fischerhuette 2, D-16775 Neuglobsow,
Germany
Donald D. Adams (Donald.Adams@plattsburgh.edu),
Center for Earth and Environmental Science, State University of
New York, Plattsburgh, New York, U. S. A. 12901
Pirkko Kortelainen (pirkko.kortelainen@vyh.fi),
Finnish Environment Institute, P.O. Box 140, FIN-00251 Helsinki,
Finland
Both verbal and poster presentations are invited in the broad area
of biogeochemical processes related to the REDOX boundary in different
aquatic systems (freshwater, marine, wetlands, peatlands, etc.). Areas
of interest would possibly be, but not limited to: development and
movement of boundaries; interfacial transport of chemical species;
redox reactions related to organic matter mineralization and gas production;
and microbiology - e.g. gas consumption, such as methanotrophy limiting
GHG emissions
SS44 - Biogeochemical processes and their microenvironmental
controls at the sediment-water interface.
R.N. Glud (mblrg@mail.centrum.dk),
M. Kühl (mblmik@inet.uni2.dk),
Marine Biological Laboratory, University of Copenhagen, Strandpromenaden
5, DK-3000 Helsingør, Denmark
The sediment-water interface is an important and highly dynamic zone
within shallow water environments. The activity within this mm to
cm thick horizon has important implications on the nutrient and carbon
cycles within aquatic ecosystems. The interface is characterized by
steep gradients in water flow, and (in shallow waters) light, which
together with carbon and nutrient availability set the boundary conditions
for the benthic microbial activity. In this context the transition
from turbulent mixing to diffusive mediated solute transport at the
interface is of prime importance. Daily and seasonal variations of
environmental variables (e.g. salinity and temperature) can further
regulate the microbial activity in the steep and dynamic chemocline
that is associated with the benthic interface. Recent advances in
experimental techniques, especially microsensor and molecular techniques,
now allow more detailed insights in the structure, function and regulation
of microbial communities at the sediment-water interface. It is the
aim of the session to discuss the microenvironmental controls of benthic
microbial communities at the sediment-water interface. How are they
adapted to the unique environment of the interface, what regulates
the coupling between and the activity of the various metabolic parthways?
SS45 - Biogas cycling and emission along the
aquatic continuum: From freshwater to coastal zone
Michel Frankignoulle (Michel.Frankignoulle@ulg.ac.be),
Université de Liège
Jack Middelburg (jack.middelburg@nioo.nl),
Nederlands Instituut voor Oecologisch Onderzoek
Niels Iversen (i5ni@sv1.build.auc.dk),
Aalborg University
Richard Coffin (rcoffin@ccsalpha3.nrl.navy.mil),
Naval Research Laboratory
Kenneth S. Grabowski (grabowski@nrl.navy.mil),
Naval Research Laboratory
The aquatic continuum (lakes, rivers, estuaries, shelves) is often
site of intense biogeochemical processes which are liable to generate
important biogas concentration (e.g. CO2, CH4, CO, N2O, DMS) with
further transfer to the atmosphere. During this session, priority
will be given to the relevant processes within the sediment and the
water column, and to the related atmospheric exchanges. This session
will then mainly cover the following boundaries: water/air, sediment/water,
rivers/lakes and freshwater/marine.
SS-46 The Response of North Atlantic Shelf Ecosystems
to Climate Variability and Change
Charles Greene (chg2@cornell.edu),
Ocean Resources and Ecosystem Program, 2130 Snee Hall, Cornell
University, Ithaca, NY 14853, USA
B. Planque (b.planque@cefas.co.uk)
UK
Predicting the response of North Atlantic shelf ecosystems to climate
variability and change will require an improved understanding of the
basin-scale coupling between physical and biological processes. This
session will focus on processes affecting large marine ecosystems
(LME's) in both the NE and NW Atlantic. Specifically, comparisons
will be made between climate variability, physical oceanography, biological
oceanography, and the physical-biological coupling on both sides of
the Atlantic Basin. The session's basic premise is that basin-scale
climatic events, like the North Atlantic Oscillation, influence the
North Atlantic as a whole, but the impacts on and responses of LME's
can be quite different in the NE and NW Atlantic. One perspective
that will be explored throughout the session is the view of the North
Atlantic Basin as a network of distinct, but coupled LME's. Each of
these LME's has its own characteristic internal dynamics, but is also
influenced to varying degrees by advective exchanges with the other
ecosystems. While most previous studies of LME's have emphasized their
internal dynamics, we hope that this session will encourage future
studies to recognize more explicitly the coupled nature of such ecosystems
and quantitatively characterize the advective supply and loss processes
at their boundaries.
Sessions 01 - 15 | Sessions
16 - 30 | Sessions
31 - 46
