| 引用本文: | 刘昔,厉恩华,徐杰,邓兆林,黄小龙,王英才,王学雷.洪湖湿地生态系统演变及稳态转换关键驱动因子阈值研究.湖泊科学,2023,35(3):934-940. DOI:10.18307/2023.0313 |
| Liu Xi,Li Enhua,Xu Jie,Deng Zhaolin,Huang Xiaolong,Wang Yingcai,Wang Xuelei.Evolution mechanism of Lake Honghu wetland ecosystem and regime shift crucial threshold. J. Lake Sci.2023,35(3):934-940. DOI:10.18307/2023.0313 |
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| 洪湖湿地生态系统演变及稳态转换关键驱动因子阈值研究 |
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刘昔1,2, 厉恩华2, 徐杰1, 邓兆林3, 黄小龙1, 王英才1, 王学雷2
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1.生态环境部长江流域生态环境监督管理局生态环境监测与科学研究中心, 武汉 430010;2.中国科学院精密测量科学与技术创新研究院, 环境与灾害监测评估湖北省重点实验室, 武汉 430061;3.荆州市洪湖湿地自然保护区管理局, 荆州 433200
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| 摘要: |
| 利用1990—2020年洪湖水环境监测数据和2011—2020年洪湖沉水植物调查数据，探讨洪湖湿地生态环境演化规律，识别稳态转换关键驱动因子并确定其阈值。研究结果表明：1990—2020年以来洪湖水质变化主要总结为5个阶段和3个时期，整体上呈现出不断恶化的趋势；2011—2020年以来洪湖沉水植物Margalef物种丰富度指数、Shannon-Wiener多样性指数、Simpson和Pielou均匀度指数分别降低32%、59%、60%和46%，特别是2016年洪涝灾害后沉水植物出现严重衰退；洪湖生态系统发生稳态转换的关键时期是2002和2011年，总磷是洪湖湿地生态系统稳态转换的关键驱动因子；清水态向浊水态转换的总磷阈值为0.092 mg/L，浊水态向清水态转化的阈值为0.051 mg/L。本研究可为洪湖入湖污染负荷削减量估算提供参考，为洪湖湿地生态修复的营养盐优先控制策略提供指导。 |
| 关键词: 洪湖湿地 稳态转换 驱动因子 沉水植物 总磷阈值 |
| DOI：10.18307/2023.0313 |
| 分类号: |
| 基金项目:国家自然科学基金联合基金项目（U2240213）和国家自然科学基金项目（41371513）联合资助。 |
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| Evolution mechanism of Lake Honghu wetland ecosystem and regime shift crucial threshold |
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Liu Xi1,2, Li Enhua2, Xu Jie1, Deng Zhaolin3, Huang Xiaolong1, Wang Yingcai1, Wang Xuelei2
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1.Ecological Environment Monitoring and Scientific Research Center, Yangtze River Basin Ecological Environment Supervision and Administration Bureau, Ministry of Ecological Environment, Wuhan 430010, P. R. China;2.Key Laboratory for Environment and Disaster Monitoring and Evaluation of Hubei, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430061, P. R. China;3.Honghu Wetland Natural Reserve Administration of Jingzhou City, Jingzhou 433200, P. R. China
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| Abstract: |
| Based on the environment monitoring data from 1990 to 2020 and the aquatic plant survey data from 2011 to 2020 in Lake Honghu, the evolution mechanism and regime shift crucial threshold of Lake Honghu wetland are studied. The results showed that the evolution of water quality in Lake Honghu from 1990 to 2020 tended to be summarized into five stages and three periods, showing a deteriorating trend. From 2011 to 2020, the Margalef, Shannon-Wiener, Simpson and Pielou index of aquatic plants in Lake Honghu had decreased by 32%, 59%, 60% and 46% respectively, especially after the flood disaster in 2016. The crucial period for regime shift of Lake Honghu wetland ecosystem is 2002 and 2011 and total phosphorus is the key driving factor. The threshold value of total phosphorus from clean water to turbid water is 0.092 mg/L, and that from turbid water to clean water is 0.051 mg/L. This study provides a reference for the estimation of the pollution reduction load into Lake Honghu, and guidance for the priority control strategy of nutrients in the ecological restoration. |
| Key words: Lake Honghu wetland regime shift drive factor submerged plant total phosphorus threshold |
