Weddell Sea Ecology -

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Résumé :
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Sommaire:
The role of sea ice in structuring Antartic ecosystems.- Community structure of the epipelagic zooplankton community under the sea-ice of the northern Weddell Sea.- Elemental composition of suspended matter in the Scotia-Weddell Confluence area during spring and summer 1988 (EPOS Leg 2).- Respiratory electron transport activity in plankton of the Weddell and Scotia Seas during late spring-early summer: relationships with other biological parameters.- Abundance of Cryptophyceae and chlorophyll b -containing organisms in the Weddell-Scotia Confluence area in the spring of 1988.- Loricate choanoflagellates of the Southern Ocean with new observations on cell division in Bicosta spinifera (Throndsen, 1970) from Antarctica and Saroeca attenuata Thomsen, 1979, from the Baltic Sea.- Early summer distribution of Antarctic krill sexual development in the Scotia-Weddell region: a multivariate approach.- Krill diet affects feacal string settling.- The distribution and abundance of krill faecal material and oval pellets in the Scotia and Weddell Seas (Antarctica) and their role in particle flux.- Top predators as indicators for ecosystem events in the confluence zone and marginal ice zone of the Weddell and Scotia seas, Antarctica, November 1988 to January 1989 (EPOS Leg 2).- Quantitative distribution of the shelf and slope molluscan fauna (Gastropoda, Bivalvia) of the Eastern Weddell Sea (Antarctica).- Reproductive biology of caridean decapods from the Weddell Sea.- New results of the EPOS leg 3 cruise to Antarctica: Horizontal and vertical distribution of isopods (Crustacea) in the eastern Weddell Sea.- Egg size and composition ain Ceratoserolis (Crustacea: Isopoda) from the Weddell Sea.- The primary structure and oxygen-binding properties of the single haemoglobin of thehigh-Antarctic fish Aethotaxis mitopteryx DeWitt.- Haematological studies on Aethotaxis mitopteryx DeWitt, a high-Antarctic fish with a single haemoglobin.- Dynamics of nutrients and phytoplankton, and fluxes of carbon, nitrogen and silicon in the Antarctic Ocean.- Influence of physical and biological processes on the concentration of O2 and CO2 in the ice-covered Weddell Sea in the spring of 1988.- The Antarctic Coastal Current in the southeastern Weddell Sea.- Fluxes of gases in an ice related ecosystem in the northwestern Weddell Sea.- Bottom-up and top-down controls of the microbial food web in the Southern Ocean: experiments with manipulated microcosms.- Spatial distribution of bacterioplankton production across the Weddell-Scotia Confluence during early austral summer 1988-1989.- Marine bacterioplankton at the Weddell Sea ice edge, distribution of psychrophilic and psychrotrophic populations.- Interactions in the microbial community of the marginal ice zone of the northwestern Weddell Sea through size distribution analysis.- Biogenic particles and nano/picoplankton in water masses over the Scotia-Weddell Sea Confluence, Antarctica.- Phytoplankton distribution in relation to sea ice, hydrography and nutrients in the northwestern Weddell Sea in early spring 1988 during EPOS.- On processes determining the vertical stability of surface waters in the marginal ice zone of the north-western Weddell Sea and their relationship with phytoplanktonbloom development.- Nitrogen uptake in the Weddell Sea during late winter and spring.- Organic carbon in the upper layer and its sedimentation during the ice-retreat period in the Scotia-Weddell Sea, 1988.- Acoustic observations on krill spring-summer migration and patchiness in the northern Weddell Sea.- Life under extremeconditions: aspects of evolutionary adaptation to temperature in crustacean proteases.- Respiratory electron transport activity of microplankton in the Weddell Sea during early spring: influence of the ice cover and th...