Abstract: Rotifers, especially Brachionidae, are important components and dominant groups of zooplankton communities. Interspecific competition among rotifers is one of major driving forces regulating structure and function of aquatic ecosystems. The main factors determining the outcomes of interspecific competition between or among Brachionidae rotifers include biotic factors such as type and quantity of food resources, relative size, initial population density, reproductive strategy of competing rotifers, and selective predation by Asplanchna as well as abiotic factors such as temperature, allelopathic substances released by competing rotifers, and water pollutants. However, most of the related studies only involve the effect of one or two factors on the interspecific competition of two Brachionidae rotifers. The research on the interspecific competition of multiple factors on multiple Brachionidae rotifers is still insufficient. In addition to field researches, laboratory studies of the interspecific competition among different Brachionidae rotifer species could be carried out by simulating multiple factors and their seasonal fluctuation in natural water bodies, which can provide more basic data for the research of interspecific competition of Brachionidae rotifers, even zooplankton.

Key words: PSⅡ activity, CsRCA, high temperature, over expression, photosynthetic rate, cucumber.