The Structure of Plankton Communities
The Structure of Plankton Communities
复制标题
浮游生物群落的结构
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
B. W. Frost
中科院分区：
文献类型：
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作者：
J. Steele;B. W. Frost
食草桡足类与浮游植物食物的相互作用取决于两个营养级中生物的大小组成。仿真模型被用来分析这些尺寸依赖关系与以下结论。1.在决定从植物到植食动物的转移方式方面，植食动物及其食物的相对大小结构比各营养级的总生物量更重要。在模型中，几乎在所有情况下，食物限制都会影响无节幼体的繁殖或第一个进食阶段。2.没有一个因素成为决定两个种群大小结构的主要因素。3.食草动物捕食的性质至少是重要的，在确定浮游植物和食草动物的大小组成的物理或营养参数。4.较大的食草动物，如哲水蚤，作为鱼类的重要食物，其数量的大小取决于它们与控制较小浮游植物的较小桡足类物种的共存。5.对系统的压力，如果它对较小的食草动物产生不利影响，可能会导致Calanus硅藻成分的分解。6.预测植物和食草动物的种群结构可能是一个更容易实现的理论目标，比预测每个营养级的总生物量更有实际意义。
Interactions of herbivorous copepods with their phytoplankton food depend on the size composition of organisms in both trophic levels. A simulation model is used to analyse these size-dependent relations with the following conclusions. 1. Relative size structure of herbivores and their food is more important than total biomass of each trophic level in determining modes of transfer from plants to herbivores. In nearly all cases, in the model, food limitation affects reproduction or the first feeding stage of the nauplii. 2. No single factor emerges as predominant in determining the size structure of both populations. 3. The nature of predation on the herbivores is at least as important in determining both phytoplankton and herbivore size composition as physical or nutrient parameters. 4. The magnitude of the population of the larger herbivores such as Calanus, important as food for fish, depends on their coexistence with the smaller copepod species which control the smaller phytoplankton. 5. Stress on the system, if it affects adversely the smaller herbivores, can lead to the breakdown of the Calanus-diatom component. 6. Prediction of the population structure for both plants and herbivores may be a more attainable objective of theory and more practically important than prediction of total biomass at each trophic level.