| 摘要: |
| 为探究鲢鳙鱼生态养殖水库中浮游动物群落结构的季节动态变化及其驱动因子,本研究于2023年4月、7月、10月和2024年1月对三河水库浮游动物群落结构和环境因子进行了调查分析。研究共采集到浮游动物16科58种,其中轮虫45种,桡足类9种,枝角类3种。春季、夏季和秋季浮游动物的优势物种均以轮虫为主,冬季浮游动物的优势物种转为桡足类。不同季节之间浮游动物的密度和生物量差异显著(P=0.001),春季密度(245.00 ind./L)和生物量(1.40 mg/L)最高,夏季密度(57.22 ind./L)和生物量(0.37 mg/L)极低,显著低于其他季节(P<0.001)。非度量多维尺度分析(NMDS)和群落相似性分析(ANOSIM)揭示三河水库浮游动物群落具有显著季节差异(Global test: R = 0.63, P = 0.001)。蒙特卡罗检验发现叶绿素a、溶解氧、水温和氨氮是影响浮游动物群落结构的主要环境因子。此外,本研究进行了鱼类前肠内含物分析及鱼类放养和渔获数据分析,结果表明生态养殖水库中鲢鳙鱼的滤食压力直接驱动了浮游动物群落结构的变化。 |
| 关键词: 浮游动物 群落结构 季节动态 环境因子 生态养殖 三河水库 |
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| 基金项目:国家自然科学基金 (31560133) 资助 |
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| Seasonal dynamic changes and driving factors of zooplankton community in silver carp and bighead carp stocking reservoir |
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Chen Xinlei, Shang Jingwen, Wang Yaowei, Sun Minfang, Han Jiamin, Zhang Shiyuan, Li Wenqi, Qin Haiming
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School of Life Science,Qufu Normal University,Qufu
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| Abstract: |
| In order to explore the seasonal dynamics and driving factors of zooplankton community structure in silver carp and bighead carp ecological breeding reservoir, the zooplankton community structure and environmental factors in Sanhe Reservoir were investigated and analyzed in April, July, October and January, 2023. A total of 58 species of zooplankton belonging to 16 families were collected, including 45 species of rotifers, 9 species of copepods and 3 species of cladocera. The dominant species of zooplankton in spring, summer and autumn are mainly rotifers, and the dominant species of zooplankton in winter are copepods. There are significant differences in zooplankton density and biomass between different seasons (P=0.001), with the highest density (245.00 ind./L) and biomass (1.40 mg/L) in spring and extremely low density (57.22 ind./L) and biomass (0.37 mg/L) in summer, which are significantly lower than those in other seasons (P < 0.001). Non-metric multidimensional scale analysis (NMDS) and community similarity analysis (ANOSIM) revealed that the zooplankton community in Sanhe Reservoir had significant seasonal differences (Global test: R=0.63, P=0.001). Monte Carlo test showed that chlorophyll a, dissolved oxygen, water temperature and ammonia nitrogen are the main environmental factors affecting the community structure of zooplankton. In addition, the foregut contents of fish and fish stocking and catch data were analyzed. The results showed that the filter feeding pressure of silver carp and bighead carp in the ecological culture reservoir directly drove the changes of zooplankton community structure. |
| Key words: zooplankton community structure seasonal dynamic environmental factors ecological aquaculture Sanhe Reservoir |
