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| Analysis of Plankton Community Characteristics and Influencing Factors in the Salmon Farming Area of Xinjiang |
| ZHAO Yiyang1, YUSUF Jeyimay2, LIU Chong2, LI Chunyu3, HAN Ruibang3, LI Xiaoqiang2, CAO Xinyu2, WANG Tao2,4, YAN Xiaofei2,4 |
1. School of Life Sciences, Xinjiang Agricultural University, Urumqi 830052, China;
2. Key Laboratory of Ecological Adaptation and Evolution, Urumqi 830052, China;
3. Xinjiang Tianyun Organic Agriculture Co., Ltd., Nilka 835700, China;
4. School of Animal Medicine, Xinjiang Agricultural University, Urumqi 830052, China |
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Abstract To understand the spatiotemporal succession characteristics of the plankton community structure and its correlation with environmental factors in the salmon aquaculture area at Nilka Hot Spring Reservoir in Xinjiang, a comprehensive survey was conducted and water quality physicochemical parameters were measured in August 2023 (summer), November (autumn) 2023, January 2024 (winter), and April (spring) 2024. The plankton community structure was analyzed by Redundancy analysis (RDA) to explore the correlation between plankton abundance and environmental factors. The results showed that a total of 35 species of phytoplankton were identified from 6 phyla, with dominant group of diatoms (Bacillariophyta), and 7 species of zooplankton were recorded from 4 phyla, primarily Cladocerans. The peak phytoplankton species richness was observed in summer and the minimal phytoplankton species richness in winter, with dominant diatoms in all seasons and significant changes in plankton abundance among sampling sites. RDA analysis revealed that water temperature (WT), total nitrogen (TN), pH, sulfide, and ammonia nitrogen (NH3-N) were the key environmental factors influencing the plankton community structure in the salmon aquaculture area, indicating that plankton community structure can serve as an effective biological indicator for ecological health assessing in aquaculture waters. To prevent excessive algal blooms and to provide a suitable living and breeding environment for salmon, it is recommended to enhance phytoplankton monitoring in summer and establish a nitrogen-phosphorus ratio regulation mechanism.
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Received: 23 November 2024
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