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Environ Pollut

Title:		Microcystis aeruginosa affects the inducible anti-predator responses of Ceriodaphnia cornuta
Author(s):		Gu L; Qin S; Zhu S; Lu N; Sun Y; Zhang L; Huang Y; Lyu K; Chen Y; Yang Z;
Address:		"Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China. State Key Laboratory of Lake and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China. Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China. Electronic address: yangzhou@njnu.edu.cn"
Journal Title:		Environ Pollut
Year:		2020
Volume:		20200108
Issue:
Page Number:		113952 -
DOI:		10.1016/j.envpol.2020.113952
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"Cyanobacterial blooms are an increasing problem in a more eutrophic world. It is still a challenge to fully understand the influence of cyanobacteria on the interactions between predator and prey at higher trophic levels. The present study was mainly undertaken to understand the inducible anti-predator responses of cladocerans while using cyanobacteria as part of food. Specifically speaking, we focused on the anti-predator strategies of Ceriodaphnia cornuta in response to different predators (fish and Chaoborus larvae) under food with different proportions of Microcystis aeruginosa. The morphological (i.e., body size and the induction of horns) and life history traits (e.g., time to first reproduction, offspring number, and survival time) responses were measured under different proportions of M. aeruginosa (i.e., 0%, 20%, 40%, 60%, 80%, and 100%). Our results showed that both the life history and the inducible anti-predator responses of C. cornuta were significantly affected by different concentrations of M. aeruginosa. Specifically, lower concentrations of Microcystis (20%-60%) can significantly promote the horns induction under Chaoborus predation risks, and higher Microcystis concentrations (60%-100%) tend to enhance reproduction in response to fish predation risks, such as larger body size, decreased time to first reproduction, and increased total offspring number. Additionally, an increasing concentration of M. aeruginosa decreased the ability of C. cornuta to reverse horns when predation risks removed. Our findings indicated that cyanobacteria affecting life history traits and the subsequent indirect effects on anti-predator responses in cladocerans could impact the interactions between predator and prey at higher trophic levels and may consequently contribute to shaping the structure of the community in a cyanobacteria bloom area"
Keywords:		"Animals Cladocera Daphnia/*physiology Fishes Microcystins/*toxicity Microcystis/*physiology Predatory Behavior/*drug effects Water Pollutants, Chemical/*toxicity Ceriodaphnia Cyanobacteria Inducible defense Kairomone Trophic level;"
Notes:		"MedlineGu, Lei Qin, Shanshan Zhu, Shuangshuang Lu, Na Sun, Yunfei Zhang, Lu Huang, Yuan Lyu, Kai Chen, Yafen Yang, Zhou eng England 2020/01/15 Environ Pollut. 2020 Apr; 259:113952. doi: 10.1016/j.envpol.2020.113952. Epub 2020 Jan 8"