Vertical distribution of the dominant planktonic crustaceans in a mesotrophic reservoir, Xujiahe reservoir (central China)
Vertical distribution of the dominant planktonic crustaceans in a mesotrophic reservoir, Xujiahe reservoir (central China)
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DOI：
10.1016/s0075-9511(01)80017-7
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发表时间：
2001-09
期刊：
影响因子：
1.7
通讯作者：
Zhengwen Liu;Yaohui Hu
中科院分区：
文献类型：
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作者：
Zhengwen Liu;Yaohui Hu
1998年7月7日，对徐家河水库优势浮游甲壳类的昼夜垂直分布进行了调查。在上游地区的D站陡坡河和下游地区鹿角岛的Li和LII站进行了采样。在D站和Li站，Leptodora kindti表现为垂直迁移。Daphanosoma dubia和Daphnia galeata在D站出现了有限的反向垂直迁移，大型个体白天倾向于停留在较低的底层。不一致中性水栖鼠白天似乎避开0-6m的水柱，但在夜间可检测到的种群比例向上移动。温旋藻在所有三个站位都表现出明显的垂直迁移行为。Crassus在不同站点的垂直分布相似：白天几乎只在6米以下的水柱中发现，夜间有相当大比例的种群向上移动。
The day and night vertical distributions of the dominant planktonic crustaceans in Xujiahe Reservoir were investigated on July 7, 1998. Sampling was carried out at Station D in the upstream region, Doupuohe, and Stations LI and LII in the downstream region, Lujiaodao. At Station D and Station LI, Leptodora kindti showed diel vertical migrations. In Daphnia galeata and Diaphanosoma dubia a limited reverse diel vertical migration was found at Station D, and large individuals tended to stay in lower layers during the day. Neutrodiaptomus incongruens seemed to avoid the water column of 0–6 m by day, but a detectable proportion of the population moved upwards at night. Mesocyclops thermocyclopoides showed a clearly defined diel vertical migration behavior at all three stations. The vertical distribution of Thermocyclops crassus was similar at different stations: in daylight hours it was found almost exclusively in the water column below 6 m and during the night a significant proportion of the population shifted upwards.