Impact of Effective Microorganisms and Chlorella vulgaris on Eriocheir sinensis and Water Microbiota in Ponds Experiencing Cyanobacterial Blooms

Jiancao Gao, Nailin Shao, Yi Sun, Zhijuan Nie, Xiwei Yang, Fei Dai, Gangchun Xu () and Pao Xu ()
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Jiancao Gao: Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
Nailin Shao: Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
Yi Sun: Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
Zhijuan Nie: Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
Xiwei Yang: Jiangsu Noah’s Ark Agricultural Technology Co., Ltd., Changzhou 213147, China
Fei Dai: Jiangsu Noah’s Ark Agricultural Technology Co., Ltd., Changzhou 213147, China
Gangchun Xu: Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China
Pao Xu: Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China

Sustainability, 2023, vol. 15, issue 9, 1-23

Abstract: Cyanobacterial blooms threaten the quality and safety of the Chinese mitten crab Eriocheir sinensis . A combination of microalgae and probiotics seems a promising way to prevent and control cyanobacterial blooms in aquaculture ponds. In E. sinensis cultivation, however, a related strategy is still lacking. To assess the potential combined effects of effective microorganisms (EM) and Chlorella vulgaris on regulating cyanobacterial blooms, in this study, we detected the alterations in the physiology of E. sinensis , as well as water quality and microbial compositions of E. sinensis culture ponds with cyanobacterial blooms. As a result, supplementary EM and C. vulgaris had no adverse effects on the growth or digestive or antioxidant ability of E. sinensis but improved the water quality of the pond by reducing total ammonia nitrogen and total nitrogen levels. We found an increase in bacterial diversity and evenness, while a decrease in the diversity of fungal and phytoplankton communities was related to supplementary EM and C. vulgaris . Interestingly, EM coupling C. vulgaris promoted the restoration of the bacterial and fungal community composition in cyanobacterial blooms ponds, particularly the increase of Mychonastes abundance and the decrease of Cyclotella . This study laid the foundation for the prevention and control of potential risks in aquaculture.

Keywords: microbial community; cyanobacterial blooms; risk prevention and control; Eriocheir sinensis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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