Mitigation of stoichiometry effects on biological interactions by biodiversity.

这项研究是为了从实验上阐明假定的环境变化对猎物(藻类)-消费者(水蚤)相互作用的化学计量影响是如何根据消费者的遗传和物种身份而改变的。理论和实验分析表明，消费者的最佳摄食率不仅取决于藻类食物的丰度，而且取决于藻类食物的化学计量，消费者的阈值食物水平甚至在物种内也根据基因类型而变化，竞争性相互作用的结果取决于消费者的物种身份。这些结果支持这样一种观点，即不同遗传和物种特性的群落对生态系统过程的化学计量影响是不同的。

This study was performed to clarify experimentally how stoichiometric impacts by putative environmental changes on prey (algae) - consumer (Daphnia) interactions are altered depending on genetic and species identities of consumers. Theoretical and experimental analyses showed that optimal feeding rates of the consumers change depending not only on abundance but also stoichiometry of algal food, that threshold food levels of the consumers change even within species according to the genotypes, and that outcomes of competitive interactions change depending on species identities of the consumers. These results support an idea that stoichiometric impacts on ecosystem processes are different among communities with different genetic and species identities.