微藻生长参数指标与种间竞争能力的关系研究

采用中国淡水系统中常见的5种微藻为实验对象，通过获取各微藻的生长参数指标，并依据指标大小对其竞争能力进行预测，进而开展微藻竞争实验，记录微藻的种间竞争结果并与预测结果进行对比。结果表明：基于生长参数指标，预测各微藻的竞争能力从大到小依次为羊角月牙藻>集星藻>盘星藻>四尾栅藻>鼓藻。微藻的竞争表现也大多与预测结果相一致，如羊角月牙藻具有最强的竞争力，盘星藻和集星藻的竞争能力居中且较为接近。然而，鼓藻的竞争力并不总是最弱，表明微藻初始密度可能会对种间竞争结果产生一定的影响作用。

Study on the Relationship Between Growth Parameters of Microalgae and Their Interspecific Competition Abilities

Five microalgae commonly found in China’s freshwater ecosystems were used as experimental objects in the present study. The growth performance of individual species was examined and quantified, and the competitive ability of individual species was predicted based on its obtained growth parameters. The competition experiment was then performed, with observed competitive outcome compared with predicted results. The findings showed that based on growth parameters of these microalgae, the rank of microalgae in regard to the competitive ability follows the order of Selenastrum capricornutum > Actinastrum hantzschii > Pediastrum sp. > Scenedesmus quadricauda > Cosmarium sp. The observed competitive outcome was mostly consistent with these predictions. For example, Selenastrum capricornutum was a superior competitor, whereas Actinastrum hantzschii and Pediastrum sp. exhibited similar competitive abilities. However, Cosmarium sp. did not always perform as an inferior competitor, suggesting that the initial density of microalgae may have imposed certain impacts on the outcome of interspecific competition.