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The Potter Cove Coastal Ecosystem, Antarctica Das The Potter Cove coastal ecosystem, Antarctica Synopsis of research performed within the frame of the Argentinean - German Cooperation at the Dallmann Laboratory and Jubany Station (King George Island, Antarctica, 1991-1997) Das Kustenokosystem der Potter Cove, Antarktis Eine Synopsis der Forschungsarbeiten im Rahmen der argentinisch - deutschen Kooperation im Dallmann-Labor und an der Jubany-Station Christian Wiencke, Gustavo Ferreyra, Wolf Arntz & Carlos Rinaldi Ber. Polarforsch. 299 (1998) ISSN 0176-5027 TABLE OF CONTENTS Introduction 1. THE ENVIRONMENT OF POTTER COVE C. Muller, A. Eckstaller, Seismological observations at Jubany/Dallmann 4 W. Jokat & A. Zakrajsek M. Pohl, T. Schone, A. Global positioning system (GPS) observations at 9 Zakrajsek & H. Schenke Jubany/Dallmann T. Schone, M. Pohl, A. Tide gauge measurements, a contribution for the long term 12 Zakrajsek & H. Schenke monitoring of the sea level S. Wunderle, H. Sauer & Meteorological conditions and snow cover dynamics on the 15 H. GoSmann Potter Peninsula, King George Island, Antarctica J.B. Winkler, F. Schulz & Seasonal variation of abiotic factors in terrestrial habitats 28 L. Kappen L. Varela Hydrology of Matias and Potter Creeks 3 3 M. Roese & M. Drabble Wind-driven circulation in Potter Cove 40 D. Abele, G.A. Ferreyra & Dynamics of hydrogen peroxide accumulation in Potter Cove 47 I. Schloss 2. STRUCTURE AND DYNAMICS OF THE ECOSYSTEM F. Schulz, J.B. Winkler & Components of terrestrial vegetation, patterns and processes 54 L. Kappen I. Schloss, G. Ferreyra & Seasonal variation of the conditions for phytoplankton growth 59 H. Kloser in Potter Cove I. Schloss, G.A. Ferreyra Phytoplankton primary production in Potter Cove, King 67 & A. Curtosi George Island M.L. Quartino, H. Kloser Communities of benthic marine algae at a sheltered site in 74 A. Boraso de Zaixso & Potter Cove, King George Island, South Shetlands, Antarctica H. Zaixso C. Wiencke, M. Clayton, Biodiversity, life cycles and evolution of Antarctic macroalgae 82 & A. Peters I. Gomez, C. Wiencke & Life strategy of Antarctic macroalgae 90 G. Weykam H. Kloser Habitats and distribution patterns of benthic diatoms in Potter 95 Cove (King George Island) and its vicinity J. Kowalke & D. Abele A first record of the soft bottom infauna community of Potter 106 Cove. M. Tatian, R. Sahade, Some aspects of Antarctic ascidians (Tunicata, Ascidiacea) of 113 M. E. Doucet & Potter Cove, King Georg Island G. B. Esnal M. Mayer & M. Spindler Habitat demands and zonation of benthic foraminifera in the 119 Potter Cove: First results R. Sahade, M. Tatidn, J. Epifaunal communities in Potter Cove, King George Island, 123 Kowalke, S. Kuhne & G. Antarctica B. Esnal G. Veit-Kohler Meiofauna study in the Potter Cove - Sediment situation and 132 resource availability for small crustaceans (Copepoda and Pera- carida) G. Mercuri, K. Iken, On the distribution patterns and density of the Antarctic in- 137 B. Ledesma & R. F. Du- faunal bivalve Laternula elliptica in Potter Cove, King George bois Island, Antarctica F. Momo, E. Bogazzi & Amphipods of Potter Cove: Community composition, biology 144 F. Duttweiler and growth K. Elwers & H.-U. Dahms Species composition and seasonal population structure of 150 Oithona similis (Copepoda, Cyclopoida) in the Potter Cove (King George Island, Antarctica) E. Barrera-Oro & Ecology of demersal fish species from Potter Cove 156 R. Casaux H. Bornemann, J. Plotz & Southern elephant seal migration and Antarctic sea ice 168 S. Ramdohr & L. Sell- mann S. Hahn, H.-U. Peter, P. Population estimates of the birds of Potter Peninsula 174 Quillfeldt & K. Reinhard W.P. Mac Cormack, S. C. Studies on the bacterial flora associated to the brown skua 182 Vazquez & D. Montalti (Catharacta antarctica lonnbergi) 3. ECOPHYSIOLOGICAL STUDIES ON KEY ORGANISMS IN THE ECOSYSTEM J.B. Winkler, L.Kappen & CO2 exchange of two chionophilous lichens in the maritme 188 F. Schulz Antarctic - preliminary results I. Gome'z, G. Weykam & Photosynthetic light requirements of Antarctic macroalgae in 193 C. Wiencke relation to their depth zonation F. Laturnus, C. Wiencke, Speciation of volatile organohalogen compounds released by 198 B. Giese & F.C. Adams Antarctic macroalgae S.C. Vazquez, W.P. Mac Protease-producing psychrotrophic Antarctic bacteria 204 Cormack & E.R. Fraile M.E.I. Marquez Some biochemical data on fish and southern elephant seals 212 from Potter Cove J. Kowalke Particle retention and pumping rates of seven species of 219 Antarctic suspension feeding animals R. Sahade, M. Tatife, F. Seasonality in reproduction of Antarctic ascidians (Molgula 225 Mattio & G. B. Esnal pedunculata, Cnemidocarpa verrucosa and Pyura setosa) H.-J. Urban Upper temperature tolerance of two Antarctic molluscs 230 (Laternula elliptica and Nacella concinna) from Potter Cove, King George Island, Antarctic Peninsula D. Abele, P. Wencke & Oxidative stress and temperature acclimation in Antarctic 237 H.-O. Portner shallow waters molluscs S. Ramdohr, J. Plotz, Studies on the lipoproteins of the southern elephant seal 243 H. Bornemann, C. Engel- (Mirounga leonina) during the breeding season at King schalk, J. Thiery & R. George Isand Eisert A.R. Carlini Energy investment in pups of southern elephant seals and mass 244 changes in females while at sea at King George Island 4. FOOD WEB STRUCTURE AND ENERGY FLOW IN THE POTTER COVE ECOSYSTEM K. Iken, M.L. Quartino, Trophic relations between macroalgae and herbivores 258 E. Barrera-Oro, J. Paler- mo, C. Wiencke & T. Brey E. Marschoff, B. Gonzales Studies on krill from penguin stomach contents at Potter Cove 263 & S. Vivequin R. Casaux, E. Barrera-Oro, Fish as prey of birds and mammals at the South Shetland 267 N. Cona & A. Carlini Islands G. C. Cadee A study of shells of the Antarctic limpet Nacella concinna at 275 Dallmann station, King George Island K. Reinhardt, S. Hahn & The role of skuas in the food web of the Potter Cove system - 279 H.-U. Peter a review S. Hahn & P. Quillfeldt Different predational pressures on two Antarctic stormpetrel 285 species M.P.S. Rodriguez & Kelp gulls (Larus dominicanus) and Antarctic limpets (Nacella 290 M. Favero concinna): their predator-prey relation at Potter Peninsula and other localities in the South Shetland Islands 5. HUMAN IMPACT AND EFFECT OF INCREASING UV-RADIATION ON THE ECOSYSTEM C. Vodopivez & A. Cur- Trace metals in some invertebrates, fishes and birds from 296 tosi Potter Cove W. P. Mac Cormack, L. N. Bacterial hydrocarbon degradation in Antarctica 304 Rios Merino & E.R. Fraile G.A. Ferreyra, I. Schloss, UV-absorbing compounds in surface waters of Potter Cove: 316 & D. Abele preliminary results Alphabetical list of authors and addresses 322.
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