Temporal changes in zooplankton composition in a hypersaline, Antarctic lake subject to periodic seawater incursions
Temporal changes in zooplankton composition in a hypersaline, Antarctic lake subject to periodic seawater incursions
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受周期性海水入侵的南极高盐湖中浮游动物组成的时间变化
DOI：
10.1007/bf00014325
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发表时间：
1991
期刊：
影响因子：
2.6
通讯作者：
Wang Zi
中科院分区：
文献类型：
--
作者：
D. Eslake;R. Kirkwood;H. Burton;Wang Zi
定居的湖弗莱彻，一个高盐度，在韦斯特福尔山，南极洲，哲水蚤桡足类Drepanopus bispinosus，剑水蚤桡足类Oncea curvata和一个未描述的cydippid栉水母的部分融合的湖泊进行了讨论。1978年，冰下的盐度为66‰，多次拖网都没有发现浮游动物。1983年，D.在1984年发现了bispinosus，并在1984年发现了该物种的繁殖活跃种群。1984年地表水盐度为56‰。1986年冬季，表层盐度为54‰，浮游动物有3种（D. bispinosus、双棘棘O. curvata和一种未描述的cydippid ctenophore）在湖中建立了种群。在1986/87年，涨潮导致附近的Taynaya湾涌入湖中，另外三个物种（哲水蚤，Paralabidocera ananarctica，两个harpacticoids，Harpacticus furcatus和Idomene sp.）是在湖里发现的1978年后的周期性洪水似乎导致湖水盐度从66 ‰下降到54‰，这使得一些无脊椎动物物种能够保持全年的种群，而其他物种则需要海洋入侵才能重新建立夏季种群。
Colonisation of Lake Fletcher, a hypersaline, meromictic lake in the Vestfold Hills, Antarctica, by the calanoid copepod Drepanopus bispinosus, the cyclopoid copepod Oncea curvata and an undescribed cydippid ctenophore is discussed. In 1978, salinity directly under the ice was 66‰ and repeated net hauls found no zooplankton. In 1983, adults of D. bispinosus were found, and in 1984, a reproductively active population of this species. Surface water salinity in 1984 was 56‰. During winter 1986, surface salinity was 54‰ and three zooplankton species (D. bispinosus, O. curvata and an undescribed cydippid ctenophore) had established populations in the lake. In 1986/87, high tides caused nearby Taynaya Bay to flood into the lake, and three further species (the calanoid, Paralabidocera antarctica, and two harpacticoids, Harpacticus furcatus and Idomene sp.) were found in the lake. It appears that periodic flooding after 1978 caused a salinity decrease in the lake from 66 to 54‰, and this enabled some invertebrate species to maintain year-round populations, whereas others require marine incursions to re-establish summer only populations.