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Open AccessArticle

Changes in Pelagic Fish Community Composition, Abundance, and Biomass along a Productivity Gradient in Subtropical Lakes

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State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
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Wuhan Zhiyue Water Ecological Technology Company, LTD., Wuhan 430014, China
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Yunan Key Laboratory of Plateau Geographical Processes and Environmental Change, Faculty of Geography, Yunnan Normal University, Kunming 650500, China
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School of Geography, South China Normal University, Guangzhou 510630, China
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Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou 510630, China
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Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing 100190, China
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Department of Bioscience, Aarhus University, Silkeborg 8600, Denmark
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Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and İmplementation, Middle East Technical University, Ankara 06800, Turkey
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Institute of Marine Sciences, Middle East Technical University, Erdemli-Mersin 33731, Turkey
*
Author to whom correspondence should be addressed.
Academic Editor: Giuseppe Castaldelli
Water 2021, 13(6), 858; https://doi.org/10.3390/w13060858
Received: 23 January 2021 / Revised: 16 March 2021 / Accepted: 17 March 2021 / Published: 21 March 2021
(This article belongs to the Special Issue Impacts of Human Activities and Climate Change on Freshwater Fish)
How fish communities change with eutrophication in temperate lakes is well documented, while only a few studies are available from subtropical lakes. We investigate the fish community structure in 36 lakes located in the Yangtze River basin, covering a wide nutrient gradient. We found that fish species richness and total fish catch per unit effort (CPUE) increased significantly with chlorophyll a (Chla). Among the different feeding types, the proportion of zooplanktivores increased significantly with Chla, while the percentage of omnibenthivores showed no obvious changes; the CPUE of piscivorous Culter spp. increased with Chla, while their proportion of total catch decreased pronouncedly. Based on the index of relative importance (IRI), the most important and dominant fish species was the zooplanktivorous Sijiao (Toxabramis swinhonis), followed by the omniplanktivorous sharpbelly (Hemiculter leucisculus) and the omnibenthivorous crucian carp (Carassius carassius), a small-sized species belonging to the Cyprinidae family. The CPUE of these three species increased significantly with Chla. The focus has, so far, been directed at large fish, but as emphasized by our results, the abundant small fish species were dominant in our subtropical study lakes even in terms of biomass, and, accordingly, we recommend that more attention be paid to the population dynamics of these species in the future. View Full-Text
Keywords: lake eutrophication; fish community structure; total phosphorus; chlorophyll a; shallow lake; Yangtze River basin lake eutrophication; fish community structure; total phosphorus; chlorophyll a; shallow lake; Yangtze River basin
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MDPI and ACS Style

Yu, J.; Zhen, W.; Kong, L.; He, H.; Zhang, Y.; Yang, X.; Chen, F.; Zhang, M.; Liu, Z.; Jeppesen, E. Changes in Pelagic Fish Community Composition, Abundance, and Biomass along a Productivity Gradient in Subtropical Lakes. Water 2021, 13, 858. https://doi.org/10.3390/w13060858

AMA Style

Yu J, Zhen W, Kong L, He H, Zhang Y, Yang X, Chen F, Zhang M, Liu Z, Jeppesen E. Changes in Pelagic Fish Community Composition, Abundance, and Biomass along a Productivity Gradient in Subtropical Lakes. Water. 2021; 13(6):858. https://doi.org/10.3390/w13060858

Chicago/Turabian Style

Yu, Jinlei; Zhen, Wei; Kong, Lingyang; He, Hu; Zhang, Yongdong; Yang, Xiangdong; Chen, Feizhou; Zhang, Min; Liu, Zhengwen; Jeppesen, Erik. 2021. "Changes in Pelagic Fish Community Composition, Abundance, and Biomass along a Productivity Gradient in Subtropical Lakes" Water 13, no. 6: 858. https://doi.org/10.3390/w13060858

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