Empirical models of phosphorus and nitrogen excretion rates by zooplankton
Empirical models of phosphorus and nitrogen excretion rates by zooplankton
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DOI：
10.4319/lo.1994.39.7.1669
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发表时间：
1994-11
影响因子：
4.5
通讯作者：
Y. Wen;R. Peters
中科院分区：
文献类型：
--
作者：
Y. Wen;R. Peters
尽管浮游动物的磷和氮排泄速率对水生生态系统的养分循环具有重要意义，但文献中很少提供这些过程的定量一般模型。我们使用从已发表的研究中收集的数据来构建淡水和海洋栖息地浮游动物P和N排泄率的潜在预测模型。P和N的排泄率呈强相关（r2 = 0.88），因此两者的排泄率最好。呼吸速率也与磷和氮排泄速率高度显著相关，是第二好的预测因子。虽然体型对整体变异的解释相对较少，但在多元回归中纳入温度、容器体积和实验持续时间作为自变量，大大提高了基于体型的模型的预测能力。这些模型可以修正浮游动物的分类偏差，但这些偏差通常很小。这些模型既可以为进一步实证分析浮游动物营养物质排泄的决定因素提供基础，也可以为预测水生生态系统中营养物质的去向提供手段。
Although rates of P and N excretion by zooplankton have important implications for nutrient cycling in aquatic ecosystems, the literature offers few quantitative general models of these processes. We used data collected from published studies to construct potentially predictive models of P and N excretion rates by zooplankton from freshwater and marine habitats. Excretion rates of P and N are strongly correlated (r2 = 0.88) and consequently each predicts the other best. Respiration rate is also highly significantly correlated with P and N excretion rates and is the second best predictor. Although body size explained relatively less overall variability, the inclusion of temperature, container volume, and experimental duration as independent variables in multiple regressions substantially improved the predictive power of models based on body size. The models can be corrected for taxonomic biases in zooplankton, but these biases were usually small. These models could provide both a basis for further empirical analysis of the determinants of zooplankton nutrient excretion and a means of predicting the fate of nutrients in aquatic ecosystems.