Biodiversity change after climate-induced ice-shelf collapse in the Antarctic
Biodiversity change after climate-induced ice-shelf collapse in the Antarctic
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DOI：
10.1016/j.dsr2.2010.05.024
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发表时间：
2011-01-01
影响因子：
3
通讯作者：
Smith, Craig
中科院分区：
文献类型：
--
作者：
Gutt, Julian;Barratt, Iain;Smith, Craig
对南极半岛东部陆架的海洋生态系统进行了调查，在气候引起的拉森A和B冰架崩溃后的5年和12年。发现了贫乏的底栖动物群，其中包括据推测是冰层覆盖条件下残留下来的深海物种。各种生态系统组成部分目前的结构似乎是由于极端不同的反应速度的变化，从贫营养亚冰架生态系统生产的货架生态系统。小型底栖生物群落仅在海湾内保持贫困状态。在局部尺度上，大型和大型表底生物多样性普遍较低，其间散布着先驱物种和典型的南极大型底栖陆架物种。南极小须鲸和海豹利用拉森A/B区以可能是新建立的磷虾和中上层鱼类生物量为食。生态系统的影响还远远超出了冰架崩塌区，拉森海湾排出的冰山冲刷造成海底高度扰动的地区。(C)2010爱思唯尔有限公司版权所有。
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. (C) 2010 Elsevier Ltd. All rights reserved.