| 引用本文: | 池仕运,韦翠珍,胡俊,王瑞,周连凤,胡菊香.富营养深水水库底栖动物群落与浮游生物相关性分析.湖泊科学,2020,32(4):1060-1075. DOI:10.18307/2020.0415 |
| CHI Shiyun,WEI Cuizhen,HU Jun,WANG Rui,ZHOU Lianfeng,HU Juxiang.Correlation between macroinvertebrates and plankton in two deep eutrophic reservoirs. J. Lake Sci.2020,32(4):1060-1075. DOI:10.18307/2020.0415 |
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| 摘要: |
| 底栖动物和浮游生物通过食物网发生复杂的交互作用，是水库生态系统物质循环的重要组分.南湾水库和汤浦水库均为存在富营养化现象的深水水库，具有较长时间的水温分层期.本文选取这两座供水水库为对象，比较其水体营养状态、底栖动物的群落结构、现存量和多样性.通过群落状态指数（IICS）定量评估底栖动物群落状态，并采用PLS模型、Spearman秩相关以及回归图探讨浮游生物各类群密度与IICS的关系.研究结果显示，南湾水库富营养程度高于汤浦水库，寡毛类在南湾水库占据优势地位，摇蚊类在汤浦水库数量上占优.南湾水库以收集者为主，其数量占比远高于汤浦水库.深水水库通常存在较强的热分层，富营养化会加重水库底部的缺氧或厌氧状态，导致底栖动物遭受周期性的缺氧扰动，影响种类多样性和现存量，改变浮游生物类群与底栖动物群落的相关性，因此底栖动物群落与浮游生物的相关性能够提供判断水库富营养化程度的重要信号，进而为水库管理方提供更多有价值的参考信息. |
| 关键词: 富营养化 水温分层 偏最小二乘法 群落状态指数 南湾水库 汤浦水库 底栖动物 浮游生物 |
| DOI：10.18307/2020.0415 |
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| 基金项目:国家自然科学基金项目（51779158，51279112，51409178）和国家重点研发计划项目（2017YFC0405303）联合资助. |
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| Correlation between macroinvertebrates and plankton in two deep eutrophic reservoirs |
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CHI Shiyun1, WEI Cuizhen2, HU Jun1, WANG Rui1, ZHOU Lianfeng1, HU Juxiang1
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1.Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources and Chinese Academy of Sciences, Wuhan 430079, P. R. China;2.Institute of Huai River Water Resources Protection, Bengbu 233001, P. R. China
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| Abstract: |
| In reservoir ecosystems, both macroinvertebrates and plankton play an important role in the matter cycling by interactions in food webs. Nanwan Reservoir and Tangpu Reservoir are deep reservoirs with eutrophication and long-term thermal stratification. In this study, these two reservoirs for drinking water supply were investigated to compare their trophic status, macroinvertebrate community structure, stranding crops and biodiversity. The macroinvertebrate communities were quantitatively assessed by Integral index of communities state (IICS) index, and the relationship between the density of plankton and IICS was explored by a PLS model, Spearman rank correlation and regression charts. The results showed that the trophic state index of Nanwan Reservoir was higher than that of Tangpu Reservoir, oligochaetes dominated in Nanwan Reservoir while chironomids did in Tangpu Reservoir. The collectors dominated in Nanwan Reservoir, where their proportion was much higher than Tangpu Reservoir. In deep reservoirs with thermal stratification, eutrophication aggravated the anoxic or anaerobic status at the reservoir bottom, resulting in the periodic anoxic disturbance to macroinvertebrates and reduced standing crops and biodiversity. The relationship between plankton and macroinvertebrate community shifting from positive correlation to negative one was related to the aggravation of reservoir eutrophication. The deterioration of the benthic habitat environment caused by the intensification of eutrophication and the food shortage caused by plankton's avoidance of unfavorable environment were the fundamental reasons for the sustained decline of macroinvertebrate population. Therefore, the reservoir eutrophication can be detected by exploring the relationship between macroinvertebrate and plankton community, for the aim of providing more valuable reference information to reservoir management. |
| Key words: Eutrophication thermal stratification PLS IICS Nanwan Reservoir Tangpu Reservoir macroinvertebrates plankton |
