Predation impact of Cyclops vicinus on the rotifer community in Lake Constance in spring
Predation impact of Cyclops vicinus on the rotifer community in Lake Constance in spring
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春季独眼巨人对博登湖轮虫群落的捕食影响
DOI：
10.1093/plankt/19.8.1069
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发表时间：
1997
影响因子：
2.1
通讯作者：
H. Stich
中科院分区：
文献类型：
--
作者：
Tanja Plaβmann;G. Maier;H. Stich
为探讨康斯坦茨湖春季轮虫数量下降的原因，在近自然条件下，研究了小围隔条件下独眼水蚤对轮虫的捕食作用。独眼水蚤选择性取食Synchaela spp.、Keratella和Polyarthra spp.没有被选中。捕食率随着猎物密度的增加而增加，当猎物密度为1.6×10~6Synchaeta m~2时，捕食率最高可达37天，即-1200 Synchaeta i“1。对捕食率的计算表明，春季单靠独眼鱼可以控制Synchaeta的丰度，即独眼水蚤是5月份康斯坦茨湖Synchaeta物种减少的主要原因。
Tne predation impact of Cyclops vicinus on rotifers was studied under near-natural con- ditions in small enclosures to evaluate whether copepod predation is responsible for the decline of rotifers in Lake Constance in spring. Cyclops vicinus fed selectively on Synchaela spp.; Keratella and Polyarthra spp. were not selected for. Predation rates increased with prey density up to a maximum of 37 Synchaela day1 at a density of 1.6 x 10 6 Synchaeta m~2, i.e. at -1200 Synchaeta I"1. Calculation of cropping rates suggests that Cyclops alone can control the abundance of Synchaeta in spring, i.e. that mainly Cyclops is responsible for the decline of Synchaeta species in Lake Constance in May.