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| Characteristics of the phytoplankton community in a land-based container aquaculture system with recycling water |
| Received:August 22, 2022 |
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| KeyWord:land-based container with recycling water aquaculture mode;phytoplankton;community structure;environmental factor;redundancy analysis |
| Author Name | Affiliation | E-mail | | ZHAO Xiuxia | Fisheries Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230001, China
Key Laboratory of Freshwater Aquaculture and Fishery Enhancement of Anhui Province, Hefei 230001, China | | | FANG Ting | Fisheries Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230001, China
Key Laboratory of Freshwater Aquaculture and Fishery Enhancement of Anhui Province, Hefei 230001, China | | | CHEN Jinliang | Anhui Organic Liangzhuang Agricultural Science and Technology Company Limited, Taihe 236629, China | | | GAO Na | Fisheries Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230001, China
Key Laboratory of Freshwater Aquaculture and Fishery Enhancement of Anhui Province, Hefei 230001, China | | | CHEN Cheng | Fisheries Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230001, China
Key Laboratory of Freshwater Aquaculture and Fishery Enhancement of Anhui Province, Hefei 230001, China | | | LU Wenxuan | Fisheries Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230001, China
Key Laboratory of Freshwater Aquaculture and Fishery Enhancement of Anhui Province, Hefei 230001, China | ahfishery@163.com |
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| Abstract: |
| To explore the phytoplankton community characteristics in a land-based container aquaculture system with recycling water and purification system, we analyzed the phytoplankton community and water physicochemical factors in the culture water of an Acipenser sinensis aquaculture container and ecological purification system. Then, we applied Shannon-Wiener diversity index and Pielou evenness index to evaluate the phytoplankton community characteristics. The experiments were carried out in October 2021 at Taihe County, Fuyang City, Anhui Province. The results showed that a total of 21 species（17 genera, 4 phyla）of phytoplankton were detected in the culture water, while 93 species were identified in the purification system, belonging to 8 phyla and 51 genera. The number of phytoplankton species in the purification system was significantly higher than that in the culture water of the land-based container with a recycling water aquaculture mode（r=0.918, P<0.01）. In the culture water, the phytoplankton density and biomass were 2.816×105 cells · L-1 and 0.021 mg · L-1, respectively, and the dominant species were Anabaena oscillarioides and Melosira granulate var. angustissima. In the purification system, the phytoplankton density and biomass were 1.135×106 cells · L-1 and 0.763 mg · L-1, respectively, with the dominant species being Scenedesmus armatus, Scenedesmus dimorphus, Crucigenia apiculate, Synedra acus, and Merismopedia minima. The purification system had more dominant species of phytoplankton, and the phytoplankton density and biomass were significantly higher than that in culture water（P< 0.01）. The purification system had a higher diversity index and evenness index than the culture system（P<0.05）, and the water quality was lightly polluted, while the culture system had a β secondary pollution level. Redundancy analysis（RDA）of phytoplankton abundance, biomass, and water environmental factors showed that pH, specific conductance, dissolved oxygen, and NO-3-N were the main environmental factors affecting the cultural water and purification system, while NO-3-N, NO-2-N, and light were the major environmental factors affecting the purification system. Therefore, in actual production, the phytoplankton community structure in land-based container culture water and the purification system can be controlled by regulating water quality to maintain the operation of the aquaculture mode. |
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