文献类型： 外文期刊
作者： Gao, Y. 1 ; Liu, Q. F. 1 ; Zheng, Y. T. 1 ; Lai, Z. N. 1 ; Wang, C. 1 ; Zeng, Y. Y. 1 ; Yang, W. L. 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China
2.Key Lab Aquat Anim Immune Technol Guangdong Prov, Guangzhou 510380, Peoples R China
3.Zhongkai Univ Agr & Engn, Guangzhou 510225, Peoples R China
关键词： Brachionus calyciflorus; Keratella valga; species diversity; population growth rate; maximum population density
期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.711； 五年影响因子：0.797 ）
ISSN： 1589-1623
年卷期： 2021 年 19 卷 5 期
页码：
收录情况： SCI
摘要： There is often intense competition among species in an environment with limited resources and space, leading to the exclusion of inferior competitors, reduced species diversity, and changes in zooplankton communities. This study investigated the interspecific competition between two dominant rotifer species in the Pearl River Basin, Brachionus calyciflorus and Keratella valga, through laboratory experiments at different temperatures, food concentrations, and initial rotifer densities. In separate cultures, the population growth of both rotifer species was affected by changes in temperature, food density, and initial density. In mixed cultures, B. calyciflorus was inhibited by competition, leading to an overall decrease in its population growth rate and maximum population density. K. valga was also affected by competition, leading to an increase in its population growth rate and maximum population density at 20 celcius or at an initial density of 1.0 x 106 cells/mL. B. calyciflorus was excluded by K. valga at low and medium food concentrations (0.5 x 106 and 1.0 x 106 cells/mL), whereas the opposite was found at high food concentration (3.0 x 106 cells/mL). Food concentration is obviously the main factor affecting outcome. Temperature, initial density, and interactions between the three factors also have an effect on it. Keywords: Brachionus calyciflorus, Keratella valga, species diversity, population growth rate, maximum
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