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http://dx.doi.org/10.11614/KSL.2019.52.4.285

Similarity of Zooplankton Community Structure among Reservoirs in Yeongsan-Seomjin River Basin  

Ko, Eui-Jeong (Department of Integrated Biological Science, Pusan National University)
Kim, Gu-Yeon (Department of Science Education, Kyungnam University)
Joo, Gea-Jae (Department of Integrated Biological Science, Pusan National University)
Kim, Hyun-Woo (Department of Environmental Education, Sunchon National University)
Publication Information
Korean Journal of Ecology and Environment / v.52, no.4, 2019 , pp. 285-292 More about this Journal
Abstract
Our study was based on the long-term surveys with respect to the major reservoirs located in the Yeongsan and Seomjin river basins. A total of 45 survey sites have been surveyed four times a year from 2008 to 2017. We identified 166 zooplankton species, including 127 rotifers, 26 cladocerans, and 13 copepods. Mean population density and species number of small reservoirs were higher than those of mid and large reservoirs. Considering outliers exceeding the 90th percentile between species occupancy and mean abundance, 10 of 11 habitat generalists were rotifers, and Bosmina longirostris was the only cladoceran. Habitat specialist consisted of three species of rotifers and emerged from one to three survey sites. According to the modularity results, it was found that the survey sites covering the entire river basins were characterized into five groups, which was similar to the classification by maximum water surface areas(MWSA). The result of the eigenvector centrality showed that the size of MWSA had a greater impact on the similarity of zooplankton community structure between reservoirs than the difference in distance between reservoirs. In the case of survey points in near dam or estuary bank of Juam and Youngsan reservoirs, modularity class were separated from other internal survey points of those. Given that the zooplankton interactions may contribute to freshwater functions more than species diversity. These topological features provide new insight into studying zooplankton distribution patterns, their organization and impacts on freshwater-associated function.
Keywords
community; eigenvector centrality; modularity; generalist; specialist;
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