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The influence of water retention time on rotifer community structure of pumped-storage reservoirs in Zhuhai City(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2015 03
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The influence of water retention time on rotifer community structure of pumped-storage reservoirs in Zhuhai City
QIAO Lei LIN Qiuqi HAN Boping
Institute of Hydrobiology, Jinan University, Guangzhou 510632, China
rotifer community structure water retention time reservoir

This study aimed to investigate the influence of water retention time on the structure and dynamics of rotifer communities in six pumped-storage reservoirs in Zhuhai City, Guangdong Province. We took zooplankton samples and determined the nutrient concentration in January and November 2013 in six reservoirs. The samples were identified and counted with microscope and anatomical lens; R program was used to analyze the data. All together thirty four species of rotifer were observed, among which 53% species belonged to Brachionidae and Trichocereidae. Rotifer species are similar in all the six studied reservoirs, with Keratella tropica, Keratella cochlearis, and Polyarthra trigla as the dominant species. However, there were great differences in rotifer community structure between reservoirs and two sampling periods in each reservoir, with Bray-Curtis dissimilarity ranging from 0.15 to 0.83. The dissimilarity of rotifer community in the reservoir with an intermediate retention time was significantly higher than through flowing reservoir (ANOVA, P = 0.041), and long retention time reservoir (ANOVA, P = 0.019), but there was no significant difference between the through flowing reservoir and long retention reservoir (ANOVA, P = 0.435). The results indicated that the water retention time is the main variable explaining the difference of rotifer community structure, and the nutrient level is the main factor influencing the temporal variation of rotifer communities.


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Last Update: 2015-06-23