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Title

Biodiversity change after climate-induced ice-shelf collapse in the Antarctic

AuthorsGutt, Julian; Isla, Enrique ; Sañé, Elisabet
KeywordsAntarctic Peninsula
Benthos
Krill
Apex predators
Pioneer species
Deep-sea species
Issue DateJan-2011
PublisherElsevier
CitationDeep Sea Research - Part II - Topical Studies in Oceanography 58(1-2): 74-83 (2011)
AbstractThe marine ecosystem on the eastern shelf of the Antarctic Peninsula was surveyed 5 and 12 years after the climate-induced collapse of the Larsen A and B ice shelves. An impoverished benthic fauna was discovered, that included deep-sea species presumed to be remnants from ice-covered conditions. The current structure of various ecosystem components appears to result from extremely different response rates to the change from an oligotrophic sub-ice-shelf ecosystem to a productive shelf ecosystem. Meiobenthic communities remained impoverished only inside the embayments. On local scales, macro- and mega-epibenthic diversity was generally low, with pioneer species and typical Antarctic megabenthic shelf species interspersed. Antarctic Minke whales and seals utilised the Larsen A/B area to feed on presumably newly established krill and pelagic fish biomass. Ecosystem impacts also extended well beyond the zone of ice-shelf collapse, with areas of high benthic disturbance resulting from scour by icebergs discharged from the Larsen embayments.
DescriptionJulian Gutt ... et al. -- 10 pages, 5 figures, 1 table. -- Supplementary data associated with this article can be found in the online version at doi:10.1016/j.dsr2.2010.05.024.
Publisher version (URL)http://dx.doi.org/10.1016/j.dsr2.2010.05.024
URIhttp://hdl.handle.net/10261/48585
DOI10.1016/j.dsr2.2010.05.024
ISSN0967-0645
Appears in Collections:(ICM) Artículos
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