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Article Dans Une Revue Deep Sea Research Part II: Topical Studies in Oceanography Année : 2011

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

Werner Dimmler
  • Fonction : Auteur
Thomas Saucède
Craig Smith

Résumé

The 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.
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Dates et versions

hal-00567592 , version 1 (19-09-2022)

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Paternité - Pas d'utilisation commerciale

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Julian Gutt, Iain Barratt, Eugene Domack, Cédric d'Udekem d'Acoz, Werner Dimmler, et al.. Biodiversity change after climate-induced ice-shelf collapse in the Antarctic.. Deep Sea Research Part II: Topical Studies in Oceanography, 2011, 58 (1-2), pp.74-83. ⟨10.1016/j.dsr2.2010.05.024⟩. ⟨hal-00567592⟩
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