USAP-DC

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Collaborative Research: Exploring the Vulnerability of Southern Ocean Pinnipeds to Climate Change - An Integrated Approach Start Date: 2012-09-01 End Date: 2015-08-31 Description/Abstract Building on previously funded NSF research, the use of paleobiological and paleogenetic data from mummified elephant seal carcasses found along the Dry Valleys and Victoria Land Coast in areas that today are too cold to support seal colonies (Mirougina leonina; southern elephant seals; SES) supports the former existence of these seals in this region. The occurrence and then subsequent disappearance of these SES colonies is consistent with major shifts in the Holocene climate to much colder conditions at the last ~1000 years BCE). Further analysis of the preserved remains of three other abundant pinnipeds ? crabeater (Lobodon carciophagus), Weddell (Leptonychotes weddelli) and leopard (Hydrurga leptonyx) will be studied to track changes in their population size (revealed by DNA analysis) and their diet (studied via stable isotope analysis). Combined with known differences in life history, preferred ice habitat and ecosystem sensitivity among these species, this paleoclimate proxy data will be used to assess their exposure and sensitivity to climate change in the Ross Sea region during the past ~1-2,000 years Personnel Person Role Koch, Paul Investigator Costa, Daniel Co-Investigator Hoelzel, A. Rus Co-Investigator Funding Antarctic Organisms and Ecosystems Award # 1142108 AMD - DIF Record(s) USAP-1142108_1 Data Management Plan None in the Database Product Level: 0 (raw data) Datasets Repository Title (link) Format(s) Status BCO-DMO Southern Ocean Pinnipeds None exist Publications Koch, P. L., Hall, B. L., de Bruyn, M., Hoelzel, A. R., Baroni, C., & Salvatore, M. C. (2019). Mummified and skeletal southern elephant seals (Mirounga leonina) from the Victoria Land Coast, Ross Sea, Antarctica. Marine Mammal Science, 35(3), 934–956. (doi:10.1111/mms.12581) Keywords Platforms and Instruments