Clarke Andrew, Barnes David K A, Hodgson Dominic A
Biological Sciences, British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge, UK, CB3 0ET.
Trends Ecol Evol. 2005 Jan;20(1):1-3. doi: 10.1016/j.tree.2004.10.004.
The traditional view of Antarctica and the surrounding Southern Ocean as an isolated system is now being challenged by the recent discovery at the Antarctic Peninsula of adult spider crabs Hyas areneus from the North Atlantic and of larvae of subpolar marine invertebrates. These observations question whether the well described biogeographical similarities between the benthic fauna of the Antarctic Peninsula and the Magellan region of South America result from history (the two regions were once contiguous), or from a previously unrecognized low level of faunal exchange. Such exchange might be influenced by regional climate change, and also exacerbated by changes in human impact.
传统观点认为南极洲及周边南大洋是一个孤立系统，然而最近在南极半岛发现来自北大西洋的成年蜘蛛蟹Hyas areneus以及亚极地海洋无脊椎动物的幼虫，这一观点正受到挑战。这些发现引发了疑问，即南极半岛与南美洲麦哲伦地区底栖动物区系之间已被充分描述的生物地理相似性，是源于历史原因（这两个地区曾经相连），还是源于此前未被认识到的低水平动物区系交流。这种交流可能受到区域气候变化的影响，同时也会因人类影响的变化而加剧。
