| 结合生态网络解析白洋淀浮游生物生态位和种间联结性特征 |
| 摘要点击 3417 全文点击 664 投稿时间：2023-09-22 修订日期：2023-11-29 |
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| 中文关键词 白洋淀 浮游生物 生态网络 生态位 种间联结 |
| 英文关键词 Baiyangdian Lake plankton ecological network ecological niche interspecies connectivity |
| 作者 | 单位 | E-mail | | 霍笑康 | 中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室, 国家环境保护湖泊污染控制重点实验室, 北京 100012
兰州理工大学生命科学与工程学院, 兰州 730050 | huoxk_0922@163.com | | 王永刚 | 兰州理工大学生命科学与工程学院, 兰州 730050 | | | 周灵同 | 中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室, 国家环境保护湖泊污染控制重点实验室, 北京 100012
兰州理工大学生命科学与工程学院, 兰州 730050 | | | 王书航 | 中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室, 国家环境保护湖泊污染控制重点实验室, 北京 100012 | | | 姜霞 | 中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室, 国家环境保护湖泊污染控制重点实验室, 北京 100012 | | | 陈珂 | 青海省生态环境监测中心, 西宁 810002 | | | 王鹏飞 | 中国环境科学研究院, 湖泊水污染治理与生态修复技术国家工程实验室, 国家环境保护湖泊污染控制重点实验室, 北京 100012 | wangpf01@craes.org.cn |
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| 中文摘要 |
| 为了解白洋淀浮游生物群落结构及其优势种的生态位特征,于2022年春季（3月）、 夏季（7月）和秋季（9月）对白洋淀浮游生物进行采样调查. 通过构建生态网络图并结合非度量多维尺度分析（NMDS）解析3个季节浮游生物群落结构变化特征,并运用改进的Levins公式和Petraitis指数评估了浮游生物优势种的生态位宽度和生态位重叠度,通过卡方检验和种间联结性系数判断总体和优势种种间联结度. 结果表明,浮游生物在整个淀区的生态位宽度较窄. 浮游动物以轮虫为主,浮游植物主要是硅藻门、 蓝藻门和绿藻门. 浮游生物的群落变化具有明显的季节性特征. 与夏秋季相比,春季浮游生物种类较少,种间联通度较低. 夏季浮游动物优势种重叠度高,种间竞争加剧,而浮游植物的种间重叠在3个季节均处于较低水平. 夏秋季节浮游植物各优势种种间的联结性均呈显著正联结关系（W > χ0.052）,群落结构稳定. 浮游动物和浮游植物的跨域生态网络在秋季表现出较高的负相关性比例,尤其在浮游动物的桡足类和枝角类与浮游植物的绿藻门和蓝藻门之间. 白洋淀浮游生物的物种丰富,季节性差异明显,优势种以窄生态位为主,浮游生物群落总体处于较稳定的状态,桡足类和枝角类与绿藻和蓝藻之间存在较强的捕食关系. |
| 英文摘要 |
| To understand the structure of the plankton community and the ecological niche characteristics of their dominant species, sampling surveys of plankton were conducted in Baiyangdian Lake in the spring （March）, summer （July）, and autumn （September） of 2022. The changes in the plankton community during the three seasons were analyzed by constructing ecological network diagrams, non-metric multidimensional scaling analysis （NMDS）, and the ecological niche width. The niche overlap of zooplankton dominant species was evaluated by the improved Levins’ formula and Petraitis’ index. The interspecific connectivity of dominant species was judged using the chi-square test and interspecies connectivity coefficients. The results showed that the niche width of plankton in the whole area was low. Zooplankton was dominated by rotifers, and phytoplankton was dominated by diatoms, cyanobacteria, and green algae. There were significant seasonal changes in the community structures of plankton. Compared with that in summer and autumn, there were fewer species of plankton in spring and lower interspecies connectivity. The overlap of dominant species of zooplankton was high in summer, and the interspecific competition was intensified, whereas the interspecific overlap of phytoplankton was at a low level in all three seasons. There was a significant positive correlation （W > χ20.05） between phytoplankton in summer and autumn, and the community structure was stable. The interdomain ecological network of zooplankton and phytoplankton showed a high negative correlation ratio in autumn, especially between copepods and cladoceras of zooplankton and chlorophyta and cyanophyta of phytoplankton. The plankton species in Baiyangdian Lake were abundant, with obvious seasonal differences. The dominant species were mainly a narrow ecological niche. The plankton community was generally in a stable state, and there was a strong predation relationship between copepods and cladoceras and green algae and cyanobacteria. |
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