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Sci Total Environ

Title:		Piscivore stocking significantly suppresses small fish but does not facilitate a clear-water state in subtropical shallow mesocosms: A biomanipulation experiment
Author(s):		He H; Qian T; Shen R; Yu J; Li K; Liu Z; Jeppesen E;
Address:		"State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. Electronic address: hehu@niglas.ac.cn. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Sino-Danish Centre for Education and Research, University of Chinese Academy of Sciences, Beijing 101408, China. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Sino-Danish Centre for Education and Research, University of Chinese Academy of Sciences, Beijing 101408, China; Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou 510632, China. Sino-Danish Centre for Education and Research, University of Chinese Academy of Sciences, Beijing 101408, China; Department of Ecoscience, Aarhus University, Silkeborg 8600, Denmark; Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Ankara 06800, Turkey; Institute of Marine Sciences, Middle East Technical University, Mersin 33731, Turkey"
Journal Title:		Sci Total Environ
Year:		2022
Volume:		20220625
Issue:
Page Number:		156967 -
DOI:		10.1016/j.scitotenv.2022.156967
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Biomanipulation by piscivore stocking has been widely used to combat eutrophication in north temperate lakes, but its applicability in warm lakes has not yet been well elucidated. Here, we used experimental mesocosms to test the effects of a native benthi-piscivore (snakehead, Channa argus Cantor) on water clarity under subtropical conditions where small omni-benthivorous fish like crucian carp (Carassius carassius L.) prevail. Our results showed that, despite of a great reduction of crucian carp biomass, snakehead stocking did not create a strong trophic cascade as neither (herbivorous) zooplankton biomass nor their grazing pressure, indicated by biomass ratio of (herbivorous) zooplankton to phytoplankton, changed significantly. Moreover, snakehead stocking significantly increased water non-algal turbidity as well as nutrient and chlorophyll-a concentrations, suggesting that these benthi-piscivores also disturbed sediments like crucian carp did. Our study showed that biomanipulation by stocking of snakehead does not facilitate clear-water state in warm shallow lakes, even on the short-term"
Keywords:		Animals Biomass *Carps Eutrophication Lakes Phosphorus Phytoplankton *Water Zooplankton Crucian carp Fish-induced sediment resuspension Snakehead Trophic cascade Warm Lake restoration;
Notes:		"MedlineHe, Hu Qian, Tian Shen, Ruijie Yu, Jinlei Li, Kuanyi Liu, Zhengwen Jeppesen, Erik eng Netherlands 2022/06/29 Sci Total Environ. 2022 Oct 10; 842:156967. doi: 10.1016/j.scitotenv.2022.156967. Epub 2022 Jun 25"