New insights into the origins of crustaceans of Antarctic lakes
New insights into the origins of crustaceans of Antarctic lakes
复制标题
对南极湖泊甲壳类动物起源的新见解
作者：
J. Gibson;Ian A. E. Bayly
摘要综述了有关南极湖泊甲壳类起源的新证据。古动物学资料表明，在拉斯曼丘陵里德湖发现的大型水蚤已有12万多年的历史。这是最后一次冰期盛期大陆湖泊避难所的第一个直接证据。有强有力的迹象表明，在同一时期，甲虫类桡足类Boeckella Poppea在阿莫里绿洲的湖泊中保持着种群数量，这一物种在冰后迅速在南极半岛和西格尼岛形成的湖泊的殖民表明，这是一个当地的来源，而不是大陆外的来源。还提出了海洋衍生物种进入非洲大陆较长期动物群的证据。由此推断，南极湖泊中的许多甲壳类动物很可能与大陆有长期的联系。
Abstract New evidence regarding the origins of the Crustacea of Antarctic lakes is reviewed. Palaeolimnological data indicates that the cladoceran Daphniopsis studeri has been present in Lake Reid, Larsemann Hills, for over 120 000 yr. This is the first direct evidence of a continental lacustrine refugium during the last glacial maximum. There are strong indications that the calanoid copepod Boeckella poppei maintained populations over the same period in lakes of the Amery Oasis, and the rapid post-glacial colonization by this species of newly formed lakes on the Antarctic Peninsula and Signy Island argues for a local rather than an extra-continental source. Evidence for the entry of marine-derived species into the longer term fauna of the continent is also presented. It is concluded that many of the Crustacea in Antarctic lakes are likely to have had a long association with the continent.