Comparison between five coexisting species of marine copepods feeding on naturally occurring particulate matter
Comparison between five coexisting species of marine copepods feeding on naturally occurring particulate matter
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以天然颗粒物为食的五种共存海洋桡足类动物的比较
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
S. Poulet
中科院分区：
文献类型：
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作者：
S. Poulet
放牧的5种桡足类自然发生的颗粒已超过1年的时间进行了调查。每个物种的颗粒消耗与悬浮颗粒物的总浓度和组成的变化有关。所有的桡足类的反应相似，同时改变其放牧压力从一个尺寸范围到另一个的颗粒尺寸谱的变化。它们都表现为机会主义的粒子喂食器，寻找并跟踪最丰富的粒子。似乎没有物种的行为作为一个选择性的食草动物相对于颗粒大小。桡足类单位干重的摄食率存在数量上的差异，单位干重的摄食量与单位干重的摄食量成反比。该物种的取食行为将导致相当激烈的种间竞争。五个同域物种的明显持续共存是由于几个物理和生物机制同时工作。
Grazing by five species of copepods on naturally occurring particles has been investigated over a 1-yr period. The consumption of particles by each species was associated with changes in both total concentration and composition of suspended particulate material. All the copepods reacted similarly and simultaneously to the changes of the particle size spectrum by shifting their grazing pressure from one size range to another. They all behaved as opportunistic particle feeders, seeking and keeping track of the most abundant particles. No species seemed to behave as a selective grazer with respect to particle sizes. There were quantitative differences between the ingestion rates per body dry weight of the copepods, and the ingestion per body dry weight was inversely proportional to the body dry weight. The feeding behaviors of the species should lead to rather severe interspecific competition. The apparently sustained coexistence of the five sympatric species is attributable to several physical and biological mechanisms working simultaneously.