Spatial and temporal distribution characteristics and influencing factors of metazooplankton in Aha Reservoir, Guizhou Province
HU Yi1,2, LI Qiu-hua1,2, HE Ying1,2, MENG Chun-lan1,2, HAN Meng-shu3
1. Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001, China;
2. Guizhou International Science and Technology Cooperation Research Base-Water Ecology International joint Research Center, Guiyang 550001, China;
3. Key Laboratory for Information System of Information and Computing Science of Guizhou Province, Guizhou Normal University, Guiyang 550001, China
In order to explore the community structure of zooplankton and the environmental factors at Aha Reservoir in Guizhou Province, the community composition and spatio-temporal distribution characteristics of zooplankton were analyzed combined with the comprehensive nutritional status index, biodiversity index and redundancy analysis (RDA). The water samples were collected among November 2017 (dry period), April 2018 (level period) and July 2018 (flood period). Total of thirty-eight metazooplankton species were identified which consisted of 25species of rotifers, 9species of cladocerans and 4species of copepod. The dominant species included Keratella cochlearis, Keratella valga, Keratella quadrata, etc. The abundance of zooplankton was among 105.47ind./L during the dry period, 120.65ind./L during the level period, 524.64ind./L during the flood period. Zooplankton biomass was 1.40mg/L (dry period), 0.37mg/L (level period) and 1.61mg/L (flood period) respectively. Additionally, the maximum values of zooplankton biomass appeared in the flood period. The spatial and temporal distribution of diversity index was significantly different and the mean values of shannon-wiener index (H') and Margalef index (D) were 2.52 and 1.63. The results of redundancy analysis and principal component analysis showed that water temperature and nutrient salt which affect the change of zooplankton community were the main environmental factors. The reservoir was in light eutrophication and moderate pollution based on the results from the dominant species of metazooplankton, biodiversity index and trophic state index.
胡艺, 李秋华, 何应, 孟纯兰, 韩孟书. 贵州高原水库浮游动物分布特征及影响因子——以阿哈水库为例[J]. 中国环境科学, 2020, 40(1): 227-236.
HU Yi, LI Qiu-hua, HE Ying, MENG Chun-lan, HAN Meng-shu. Spatial and temporal distribution characteristics and influencing factors of metazooplankton in Aha Reservoir, Guizhou Province. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 227-236.
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