| 引用本文: | 胡洋,张亚洲,姜星宇,邵克强,汤祥明,高光.东太湖浮游植物与浮游动物群落的嵌套性及其互作网络的季节特征.湖泊科学,2022,34(5):1620-1629. DOI:10.18307/2022.0516 |
| Hu Yang,Zhang Yazhou,Jiang Xingyu,Shao Keqiang,Tang Xiangming,Gao Guang.Seasonal characteristics of nestedness pattern and interaction of plankton assemblages in East Lake Taihu. J. Lake Sci.2022,34(5):1620-1629. DOI:10.18307/2022.0516 |
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| 摘要: |
| 浮游生物主要由浮游植物和浮游动物组成，是湖泊生态系统的重要组分. 嵌套性结构及物种间的互作关系对群落的分布格局、功能乃至稳定性都具有重要意义，然而到目前为止，我们对此仍知之甚少. 为此，本研究以东太湖为研究区域，在2019—2020年期间进行了春、夏、秋、冬季的观测调查，根据浮游生物群落的组成和多样性特征，结合群落分布矩阵和二分网模型研究浮游生物的嵌套性格局及其互作关系，并探讨其驱动机制. 结果显示：(1)在时间上，春、秋、冬季水体的理化特征较为相似，但与夏季的水质差异显著. 在空间上，西南部区域的综合污染指数显著高于东北部；(2)环境异质性使得浮游植物呈现出明显的嵌套性分布，即秋、冬季群落是春、夏季群落的子集. 然而，浮游动物并未呈现该分布特征；(3)浮游生物的互作关系具有明显的季节特征：冬季的互作网络组成最简单，物种竞争最激烈，物种的特异性关系、物种脆弱性和一般性最小，说明浮游生物群落的稳定性在冬季最弱. 综上所述，水环境的时空差异性造成的生态位分离可能是造成浮游生物嵌套性及其互作网络季节性变化的主要机制. |
| 关键词: 浮游植物 浮游动物 嵌套性 互作关系 东太湖 |
| DOI：10.18307/2022.0516 |
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| 基金项目:国家自然科学基金项目(4190071339，42171114)和江苏省水利科技项目(2019007)联合资助 |
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| Seasonal characteristics of nestedness pattern and interaction of plankton assemblages in East Lake Taihu |
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Hu Yang1, Zhang Yazhou2, Jiang Xingyu1, Shao Keqiang1, Tang Xiangming1, Gao Guang1
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1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Jiangsu Taihu Water Conservancy Planning Design Institute Co., Ltd., Suzhou 215000, P. R. China
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| Abstract: |
| The plankton assemblages are mainly composed by phytoplankton and zooplankton communities, which are both crucial in the lacustrine ecosystems. It is well known about their biodiversity and composition structures; however, limited knowledge on their nestedness and interspecific interactions. In the East Lake Taihu, this study investigated the nestedness and interaction characteristics of phytoplankton and zooplankton communities in 2019-2020, by applying the appearance-absence matrix and bipartite model. The results showed: (1) The physicochemical characteristics were similar among spring, autumn and winter, but are significantly different in summer. Meanwhile, the comprehensive pollutant index was clearly higher in the southwest than that in the northeast. (2) The nestedness pattern induced by environmental heterogeneity for the phytoplankton communities indicated their compositions in autumn and winter were subset of those in spring and summer. By contrast, the zooplankton communities did not demonstrate such pattern. (3) The biotic interactions of plankton assemblies differed seasonally. The bipartite network was more complex in spring, summer, and autumn than that in winter. Moreover, the winter plankton had the fiercer competition, the higher specialization, the lower generality and higher vulnerability than other seasons did, which suggested a less stable network. Ultimately, niche separation caused by temporal-spatial differences of aquatic environment in the East Lake Taihu may be responsible for the seasonal differences of plankton assemblages' nestedness and bipartite networks. |
| Key words: Phytoplankton zooplankton nestedness interspecific interactions East Lake Taihu |
