Application of microalgae Scenedesmus acuminatus enhances water quality in rice-crayfish culture

Frontiers in Bioengineering and Biotechnology

Bioengineering and Biotechnology

Qiang Hu¹  Hu Jin²  Hongxia Wang³  Yulu Wang³  Yingchun Gong³  Lan Wang³  Chaojun Wei⁴  Rongli Miao⁴  Danni Yuan⁵  Lu Tan⁶ 

[1] CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China;Faculty of Synthetic Biology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China;Center for Microalgal Biotechnology and Biofuels, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China;Center for Microalgal Biotechnology and Biofuels, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China;State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China;Hydrobiological Data Analysis Center, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China;School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, China;Center for Microalgal Biotechnology and Biofuels, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China;Systems Ecology and Watershed Ecology Center for Freshwater Ecology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China;

关键词: microalgal application;    aquaculture ecosystem;    water quality;    Spirogyra;    sustainability;   

DOI  :  10.3389/fbioe.2023.1143622

 received in 2023-01-13, accepted in 2023-04-24,  发布年份 2023

来源: Frontiers

【 摘 要 】

Improper management of aquatic environments substantially restricts the development of the aquaculture industry. The industrialisation of the crayfish Procambarus clarkii, for example, is currently being limited by poor water quality. Research suggests that microalgal biotechnology has a great potential for water quality regulation. However, the ecological effects of microalgal applications on aquatic communities in aquaculture systems remain largely unknown. In the present study, 5 L Scenedesmus acuminatus GT-2 culture (biomass 120 g L-1) was added to an approximately 1,000 m2 rice-crayfish culture to examine the response of aquatic ecosystems to microalgal application. The total nitrogen content decreased significantly as a result of microalgal addition. Moreover, the microalgal addition changed the bacterial community structure directionally and produced more nitrate reducing and aerobic bacteria. The effect of microalgal addition on plankton community structure was not obvious, except for a significant difference in Spirogyra growth which was inhibited by 81.0% under microalgal addition. Furthermore, the network of microorganisms in culture systems with the added microalga had higher interconnectivity and was more complex, which indicating microalgal application enhance the stability of aquaculture systems. The application of microalgae was found to have the greatest effect on the 6th day of the experiment, as supported by both environmental and biological evidence. These findings can provide valuable guidance for the practical application of microalgae in aquaculture systems.

【 授权许可】

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Copyright © 2023 Yuan, Wang, Wang, Miao, Wang, Jin, Tan, Wei, Hu and Gong.