Antarctic marine ecosystems after ice barriers breaking off
DOI:
https://doi.org/10.22458/urj.v11i1.2318Keywords:
ice shelf, Antarctica, ecosystem, phytoplankton, sea ice, foehn windsAbstract
Widespread thinning and retreat of ice shelves along the margins of Antarctica provide a unique opportunity to understand the evolution of Antarctic coastal ecosystems and the consequences of abrupt global change in high latitudes. As dark environments isolated from the atmosphere, the under-ice-shelf ecosystems remain mostly unknown. After ice shelf breakup there is an opportunity to study the evolution of the coastal ecosystem exposed to the atmosphere after millennia. One of the more active regions is the Larsen Ice Shelf, on the NW of the Weddell Sea. After the ice shelf breakup, phytoplankton grow in the presence of light; primary production rates observed are amongst the highest in Antarctica. Zooplanktonic and benthic communities in the marine food web can feed on this newly synthesized carbon. In this way, regions previously unproductive are now able to absorb carbon dioxide and contribute to its absorption by the ocean.References
Bertolin, M. L., & Schloss, I. R. (2009).Phytoplankton production after the collapse of the Larse A Ice Shelf, Antarctica. Polar Biology, 32, 1435-1446.
Bruchhausen, P. M., Raymond, J. A., Jacobs, S. S., DeVries, A. L., Thorndike, E. M., & DeWitt, H. H. (1979). Fish, Crustaceans, and the Sea Floor Under the Ross Ice Shelf. Science, 203(4379), 449-451.
Cape, M. R. (2014). Impacts of atmosphere – ice – ocean interactions on phytoplankton along the coastal Antarctic Peninsula (PhD thesis). University of California San Diego, EE.UU.
Cape, M. R., M. Vernet, M. Kahru, G. Spreen (2014). Polynya dynamics drive primary production in the Larsen A and B embayments following ice shelf collapse. Journal of Geophysical Research-Oceans, 119(1), 572–594.
Cape, M. R., Vernet, M., Skvarca, P., Marinsek, S., Scambos, T., & Domack, E. (2015). Foehn winds link climate-driven warming to ice shelf evolution in Antarctica. Journal of Geophysical Research: Atmospheres, 120(21), 11-037. DOI: 10.1002/2015JD023465
Cook, A. J., & Vaughan, D. G. (2010). Overview of areal changes of the ice shelves on the Antarctic Peninsula over the past 50 years. The Cryosphere, 4(1), 77-98.
Domack, E., Duran, D., Leventer, A., Ishman, S., Doane, S., McCallum, S., ... & Prentice, M. (2005). Stability of the Larsen B ice shelf on the Antarctic Peninsula during the Holocene epoch. Nature, 436(7051), 681.
Ferrigno, J. G., Cook, A. J., Mathie, A. M., Williams, R. S. J., Swithinbank, C., Foley, K.,M., Thomson, A. J., & Sievers, J. (2008). Coastal-change and glaciological map of the Larsen Ice Shelf area, Antarctica: 1940-2005. US Geological Survey Geologic Investigations Map Series, Map I-2600-B, with 28p pamphlet, EE. UU.
Gutt, J., Cape, M., Dimmler, W., Fillinger, L., Isla, E., Lieb, V., ... & Pulcher, C. (2013). Shifts in Antarctic megabenthic structure after ice-shelf disintegration in the Larsen area east of the Antarctic Peninsula. Polar Biology, 36(6), 895-906. DOI:10.1007/s00300-013-1315-7.
Lipps, J. H., Ronan, T. E., & DeLaca, T. E. (1979). Life below the Ross ice shelf, Antarctica. Science, 203(4379), 447-449.
Orsi, A. H., Nowlin Jr, W. D., & Whitworth III, T. (1993). On the circulation and stratification of the Weddell Gyre. Deep Sea Research Part I: Oceanographic Research Papers, 40(1), 169-203.
Perovich, D. K. (1990) Theoretical estimates of light reflection and transmission by spatially complex and temporally varying sea ice covers. Journal of Geophysical Research, 95, 9557-9567.
Riddle, M. J., Craven, M., Goldsworthy, P. M., & Carsey, F. (2007). A diverse benthic assemblage 100 Km from open water under the Amery Ice Shelf, Antarctica. Paleoceanography, 22(1), PA1204. DOI:10.1029/2006PA001327
Russell, N. J. (2000) Toward a molecular understanding of cold activity of enzymes from psychrophiles. Extremophiles, 4, 83-90.
Scambos, T., Hulbe, C., & Fahnestock, M. (2003). Climate-induced ice shelf disintegration in the Antarctic Peninsula. Antarctic Peninsula Climate Variability: Historical and Paleoenvironmental Perspectives. Antarctic Research Series, 79, 79-92.
Smith Jr, W. O., Marra, J., Hiscock, M. R., & Barber, R. T. (2000). The seasonal cycle of phytoplankton biomass and primary productivity in the Ross Sea, Antarctica. Deep Sea Research Part II: Topical Studies in Oceanography, 47(15-16), 3119-3140.
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