Vertical distributions of a planktonic harpacticoid and a calanoid (Copepoda) in a meromictic Antarctic lake
Vertical distributions of a planktonic harpacticoid and a calanoid (Copepoda) in a meromictic Antarctic lake
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浮游类 harpacticoid 和 calanoid (Copepoda) 在南极分生湖中的垂直分布
DOI：
10.1007/bf00031623
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发表时间：
1989
期刊：
影响因子：
2.6
通讯作者：
D. Eslake
中科院分区：
文献类型：
--
作者：
I. Bayly;D. Eslake
Abraxas湖（南纬68° 29′，东经78° 17′）已经与海隔绝了。六千年1985年12月，它的冰盖厚度为1.38米，温跃层为5.2米，17.7米及以下为零氧。氧湖的盐度在14-19 g 1−1之间。拟哲水蚤Paralabidocera anarctica（I. C. Thompson），在5.0 m的温跃层上方有最大密度，在该深度成年雄性与雌性的数量几乎为3：1。在冰下，成年雌性的数量超过雄性4：1。不成熟的桡足虫阶段更丰富，相对于成人附近的oxycline比在更高的水平。该属的一种名为Amphiascoides sp.，在17.2 m处具有接近于氧跃层的最大密度。
Lake Abraxas (68° 29′ S., 78° 17′ E.) has been cut off from the sea for c. 6000 yr. In December, 1985, it had an ice cover 1.38 m thick, a thermocline at 5.2 m, and zero oxygen at 17.7 m and below. The salinity of the oxylimnion was in the range 14–19 g 1−1. The calanoid, Paralabidocera antarctica (I. C. Thompson), had a maximum density just above a thermocline at 5.0 m, at which depth adult males outnumbered females almost 3 : 1. Immediately beneath the ice adult females outnumbered males 4 : 1. Immature copepodite stages were more abundant relative to adults near the oxycline than at higher levels. The planktonic harpacticoid, Amphiascoides sp., had a maximum density close to the oxycline at 17.2 m.