OB007
Complexity, Connectivity and Change in Southern Ocean Food Webs
Session ID#: 85228
Session Description:
Changes in ice, ocean and ecosystem dynamics in the Southern Ocean are affecting biodiversity at all trophic levels, from plankton to whales. These reflect multiple drivers of change and the complexity and heterogeneity of ecosystems and ecological responses. Food-web processes are fundamental in maintaining the structure, functioning and resilience of ecosystems and hence in ecological responses to change. Improved understanding of Southern Ocean food webs is crucial for developing models to project the impacts of future change and informing decision making for conservation and management. An international and interdisciplinary approach is required to link studies of food webs with analyses of biogeochemical cycles and physical and chemical processes at multiple scales. This session is intended to bring together studies on emerging areas of research including the spatial and temporal variability and connectivity of food webs, food web resilience properties and biodiversity, interactions between pelagic, sea-ice or benthic food webs, importance of food-web processes in biogeochemical cycles (including carbon budgets) and combined effects of past and current harvesting and climate-related changes on individual species and their food web interactions. Presentations that report field, data syntheses and modelling studies that elucidate the structure and dynamics of Southern Ocean food webs are encouraged.
Index Terms:
1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
4815 Ecosystems, structure, dynamics, and modeling [OCEANOGRAPHY: BIOLOGICAL]
4817 Food webs, structure, and dynamics [OCEANOGRAPHY: BIOLOGICAL]
9310 Antarctica [GEOGRAPHIC LOCATION]
Primary Chair: Nadine Johnston, NERC British Antarctic Survey, Ecosystems, Cambridge, United Kingdom
Co-chairs: Andrea M Pinones, Instituto de Ciencias Marinas y Limnológicas, Valdivia, Chile, Eugene John Murphy, British Antarctic Survey, Cambridge, United Kingdom and Eileen E Hofmann, Old Dominion University, Center for Coastal Physical Oceanography, Norfolk, VA, United States
Primary Liaison: Nadine Johnston, NERC British Antarctic Survey, Ecosystems, Cambridge, United Kingdom
Impacts of environmental variability on the Kerguelen Plateau marine ecosystem (644375)
Stuart Corney, United States, Nicole A Hill, Institute of Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia, Gabriela Semolini Pilo, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia and Neil John Holbrook, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia
Influence of the diatom assemblage structure on the export of C and Si around the Kerguelen plateau (645636)
Augustin Lafond1, Karine Leblanc2, Bernard Queguiner3, Véronique Cornet4 and Justine Legras4, (1)Aix Marseille University, Marseille Cedex 03, France, (2)Aix Marseille University, Meditterranean Institute of Oceanography, Marseille Cedex 03, France, (3)Aix Marseille University, Marseille, France, (4)Aix Marseille University, France
Spatial Variability of Microbial Communities in the Ross Sea, Antarctica (647246)
Barbara Klein1, Erika L Headrick2, Lisa Nigro3, Patrick Neale4 and Wade H Jeffrey3, (1)The University of West Florida, Center for Environmental Diagnostics & Bioremediation, Pensacola, FL, United States, (2)University of West Florida, Center for Environmental Diagnostics & Bioremediation, Pensacola, FL, United States, (3)University of West Florida, Center for Environmental Diagnostics and Bioremediation, Pensacola, FL, United States, (4)Smithsonian Environmental Research Center Edgewater, Edgewater, MD, United States
Calibration, operation, and analysis of data from the Nortek Signature100 ADCP to estimate biomass and transport of Antarctic krill (647517)
George Cutter1, Sven Nylund2, Christian Reiss1 and David Velasco, (1)NOAA Southwest Fisheries Science Center, Antarctic Ecosystem Research Division, La Jolla, CA, United States, (2)Nortek Group, Norway
Physiology of Lipid-storing Copepods During Summer Along the West Antarctic Peninsula (648138)
Ann Tarrant, Woods Hole Oceanographic Institution, Department of Biology, Woods Hole, MA, United States, Deborah K Steinberg, Virginia Institute of Marine Science, Department of Biological Sciences, Gloucester Point, VA, United States and Cory A Berger, Woods Hole Oceanographic Institution, Woods Hole, United States
Summer Phytoplankton Growth at Maxwell Bay, West Antarctic Peninsula: Role of Physical Forcings (648197)
Vania Carrera1,2, Andrea M Pinones1,3, Fabian J Tapia4,5, Emilio Alarcón1,6, Juan Höfer1,7, Eun Jin Yang8 and Jose Luis Iriarte1,9, (1)Centro de Investigación: Dinámica de Ecosistemas Marinos de Altas Latitudes, Punta Arenas, Chile, (2)Programa Magíster en Oceanografía, Universidad de Concepción, Concepción, Chile, (3)Instituto de Ciencias Marinas y Limnológicas, Valdivia, Chile, (4)Universidad de Concepcion, Departamento de Oceanografía, Concepcion, Chile, (5)Centro de Investigación Oceanográfica COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile, (6)Centro de Investigación en Ecosistemas de la Patagonia, Coyhaique, Chile, (7)Pontificia Universidad Catolica de Valparaiso, Valparaiso, Chile, (8)Korea Polar Research Institute, Incheon, South Korea, (9)Universidad Austral de Chile, Puerto Montt, Chile
Regional variability of Antarctic krill (Euphausia superba) diet as determined using lipid, fatty acid and sterol composition (649475)
Nicole Hellessey1, Jessica A Ericson2, Peter D Nichols3, So Kawaguchi4, Stephen Nicol5, Nils Hoem6 and Patti Virtue1, (1)Institute for Marine and Antarctic Studies, Ecology and Biodiversity, Hobart, TAS, Australia, (2)Cawthorn Institute, Nelson, New Zealand, (3)Commonwealth Scientific and Industrial Research Organisation, Oceans and Atmosphere, Hobart, TAS, Australia, (4)Australian Antarctic Division, Krill Aquarium, Kingston, TAS, Australia, (5)Institute for Marine and Antarctic Studies, Taroona, TAS, Australia, (6)Aker BioMarine, Cheif Scientist, New York, NY, United States
Protist community structure and diversity at the West Antarctic Peninsula in austral fall – reconciling metabarcoding, microscopy and pigment analyses (650873)
Philipp Wenta1, Christoph Plum1, Dominik Bahlburg1, Katja Metfies2,3, Marina Monti4, Thomas H. Badewien1 and Stefanie Devi Moorthi1, (1)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment, Wilhelmshaven, Germany, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany, (3)Helmholtz Institute for Functional Marine Biodiversity, Oldenburg, Germany, (4)National Institute of Oceanography and Experimental Geophysics, Sgonico, Italy
Penguins as ecosystem proxies? Identifying millennial-scale shifts in carbon sources and phytoplankton regimes in the Antarctic marine ecosystem (651911)
Chantel Michelson1, Kelton McMahon2, William Paul Patterson3, Steven D Emslie4 and Michael J Polito1, (1)Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, LA, United States, (2)University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States, (3)University of Saskatchewan, Department of Geological Sciences, Saskatoon, SK, Canada, (4)University of North Carolina Wilmington, Department of Biology & Marine Biology, Wilmington, NC, United States
Lowered Cameras Reveal Hidden Seasonal, Diel, and Swarm Density Shifts in Antarctic Krill Behaviors Throughout the Water Column (651979)
Mary Kathryn Kane, Plymouth Marine Laboratory, Plymouth, United Kingdom, Angus Atkinson, Plymouth Marine Lab, Plymouth, United Kingdom and Susanne Menden-Deuer, University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States
Foraging Behavior and Movement Patterns of the Leopard Seal in the Antarctic Peninsula (653859)
Daniel P Costa, University of California Santa Cruz, Santa Cruz, CA, United States, Sarah S Kienle, University of California Santa Cruz, Dept of Ecology and Evolutionary Biology, Santa Cruz, CA, United States, Stephen Trumble, Baylor University, Biology, Waco, TX, United States, Shane Kanatous, Colorado State University, Fort Collins, CO, United States, Michael E Goebel, National Marine Fisheries Service, Antarctic Marine Living Resources Division, La Jolla, United States and Daniel E. Crocker, Sonoma State University, Biology, Rohnert Park, CA, United States
Biomass Density and Transport of Antarctic Krill Measured Using Echosounders and ADCPs Aboard Autonomous Gliders and Moorings (655742)
Christian Reiss1, George Cutter1, Jennifer Walsh2, George Watters1, Anthony Cossio1, Jefferson Hinke1 and Douglas Krause1, (1)NOAA Southwest Fisheries Science Center, Antarctic Ecosystem Research Division, La Jolla, CA, United States, (2)NOAA Southwest Fisheries Science Center, Antarctic Ecosystem Research Division, San Diego, CA, United States
A Review of the Impacts of Climate Change and Fishing on Penguins in the Western Antarctic Peninsula and Scotia Sea Region (657068)
Nicole Bransome, The Pew Charitable Trusts, Protecting Antarctica's Southern Ocean, Washington, DC, United States, Cassandra M. Brooks, University of Colorado at Boulder, Boulder, United States and Annika Cobb, University of Colorado at Boulder, United States
Stratification Control of Phytoplankton Bloom in Circum-Antarctic Coastal Polynyas: Data Analysis and Modeling (657588)
Yun Li, University of Delaware, School of Marine Science and Policy, College of Earth, Ocean and Environment, Lewes, DE, United States, Rubao Ji, Woods Hole Oceanographic Inst., Woods Hole, MA, United States and Weifeng Gordon Zhang, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Mortality of Krill in Austral Fall Within Wilhelmina Bay in the West Antarctic Peninsula (638341)
Zhiqiang Su, Shanghai Jiao Tong University, School of Oceanography, Shanghai, China, Meng Zhou, Shanghai Jiao Tong University, Institute of Oceanography, Shanghai, China, Yiwu Zhu, Shanghai Jiao Tong University, China, Boris Espinasse, University of Nordland, Faculty of Biosciences and Aquaculture / Marine Ecology Group, Postboks 1490 8049 Bodø, Norway and Elliott L. Hazen, NOAA Southwest Fisheries Science Center, Environmental Research Division, Monterey, CA, United States
Microbial control of ocean carbon and biogeochemical cycling in a changing polar ocean: Insights from ecosystem modeling of the West Antarctic Peninsula (640307)
Hyewon Kim, Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA, United States, Ya-Wei Luo, Xiamen University, Xiamen, China, Hugh W Ducklow, Lamont-Doherty Earth Observatory, Columbia University, Division of Biology & Paleo Environment, Palisades, NY, United States, Oscar Schofield, Rutgers University, New Brunswick, NJ, United States, Deborah K Steinberg, Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA, United States and Scott Doney, University of Virginia, Department of Environmental Sciences, Charlottesville, VA, United States
Zooplankton and micronekton respond to climate fluctuations in the Amundsen Sea polynya, Antarctica (643024)
Hyoung Sul La1, Keyhong Park2, Anna Wahlin3, Kevin R Arrigo4, Dongseon Kim5, Eun Jin Yang1, Angus Atkinson6, Sophie Fielding7, Jungho Im8, Tae-Wan Kim2, Hyeong Chul Shin9, SangHoon Lee2 and Ho Kyung Ha10, (1)Korea Polar Research Institute, Incheon, South Korea, (2)KOPRI Korea Polar Research Institute, Incheon, Korea, Republic of (South), (3)University of Gothenburg, Gothenburg, Sweden, (4)Stanford University, Earth System Science, Stanford, CA, United States, (5)Korea Ocean Research & Develop, Ansan, Korea, Republic of (South), (6)Plymouth Marine Lab, Plymouth, United Kingdom, (7)British Antarctic Survey, Cambridge, United Kingdom, (8)Ulsan National Institute of Science and Technology, Urban and Environmental Engineering, Ulsan, South Korea, (9)KOPRI, South Korea, (10)Inha University, South Korea
The Effect of Autumn and Winter Diet on the Physiology of Juvenile Antarctic Krill (643121)
Kim Sarah Bernard1, Kirsten B Steinke1 and Julia Fontana2, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States
The Environmental Drivers of the Physiological Condition of Young-of-Year and Mature Female Antarctic Krill: Implications for Krill Recruitment (643270)
Kirsten B Steinke1, Kim Sarah Bernard1 and Robin M Ross2, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)University of California, Santa Barbara, Marine Science Institute (Retired), United States
How will Antarctic krill habitat respond to future climate change? (644345)
Devi Veytia, University of Tasmania, Battery Point, Australia, Stuart Paul Corney, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, So Kawaguchi, Australian Antarctic Division, Krill Aquarium, Kingston, TAS, Australia, Klaus Meiners, Australian Antarctic Division, Department of the Environment, Kingston, ACT, Australia, Eugene John Murphy, British Antarctic Survey, Cambridge, United Kingdom and Sophie Bestley, Australian Antarctic Division, Kingston, TAS, Australia
Future Directions of the Integrating Climate and Ecosystems Dynamics (ICED) in the Southern Ocean Programme (645426)
Nadine Johnston, NERC British Antarctic Survey, Ecosystems, Cambridge, United Kingdom, Eugene John Murphy, British Antarctic Survey, Cambridge, United Kingdom, Rachel ~D Cavanagh, NERC British Antarctic Survey, Cambridge, United Kingdom, Richard Garth James Bellerby, State Key Laboratory for Estuarine and Coastal Research, East China Normal University, SKLEC-NIVA Centre for Marine and Coastal Research, Shanghai, China, Daniel P Costa, University of California Santa Cruz, Santa Cruz, CA, United States, Eileen E Hofmann, Old Dominion University, Center for Coastal Physical Oceanography, Norfolk, VA, United States, Walker O Smith Jr, Virginia Inst Marine Sciences, Gloucester Point, VA, United States and José C Xavier, University of Coimbra, Coimbra, Portugal
Developing projections of change for conservation and management in the Southern Ocean (645679)
Eugene John Murphy, British Antarctic Survey, Cambridge, United Kingdom, Nadine Johnston, NERC British Antarctic Survey, Ecosystems, Cambridge, United Kingdom, Stuart Paul Corney, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, Keith Reid, Commission for the Conservation of Antarctic Marine Living Resources, Hobart, TAS, Australia and Rachel ~D Cavanagh, NERC British Antarctic Survey, Cambridge, United Kingdom
