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近30年来鄱阳湖生态系统服务变化分析
陈旻坤, 徐昔保
中科院南京地理与湖泊研究所
摘要:
鄱阳湖是我国最大淡水湖,在维持区域生态安全和生态平衡中发挥重要作用。为了解近30年鄱阳湖生态系统服务变化情况,本文对已有文献与监测数据进行收集整理直接获取鄱阳湖水资源供给、渔业资源供给、水环境净化服务数据,通过输沙量法、Berger-Parker优势度指数计算泥沙淤积调控和生物多样性维持服务,利用 RMSD方法分析1992~2014年鄱阳湖生态系统服务关系。结果表明:(1)渔业资源供给和水环境净化服务不断下降,水资源供给和泥沙淤积调控服务2010s有所恢复;(2)冬候鸟种类和数量增加,鱼类种群结构逐渐恢复,但Berger-Parker指数总体上升;(3)浮游植物、底栖动物多样性上升,浮游动物多样性下降;(4)不同时间尺度各服务间均为高权衡关系,水环境净化服务相对收益始终高于其他服务。
关键词:  湖泊生态系统服务  变化特征  权衡关系
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基金项目:中国科学院重点资助项目,国家自然科学基金项目(面上项目,重点项目,重大项目)
Analysis of Poyang lake ecosystem services changes in the last 30 years
chenminkun, xuxibao
Nanjing Institute of Geography and Limnology. Chinese Academy of Sciences
Abstract:
As the largest freshwater lake of China, Poyang Lake plays a vital role in maintaining regional ecological security and ecological balance. Due to natural changes and human activities, the hydrology and hydrodynamics of Poyang Lake changed, and the ecosystem of Poyang Lake was seriously threatened, which directly led to the degradation of ecosystem services. In order to capture ecosystem services changes of the Poyang Lake in the past 30 years, the existing literature and monitoring data were systematically collected and sorted to obtain data on Poyang Lake’s water supply, fish supply, and water depuration services directly. Sediment transport method and Berger-Parker index were used to estimate sedimentation control and biodiversity protection services. The RMSD method was applied to explore the temporal change of the trade-off relationships of Poyang Lake from 1992 to 2014. The results show that: (1) Fish supply and water depuration services continued to decline. Water supply and sedimentation control services recovered gradually in 2010s. (2) The biodiversity of winter migratory birds and fish biodiversity increased slightly, charactering by the increased species and number of winter migratory birds and the fish population composition. (3) The biodiversity of phytoplankton and benthic animals increased, and the biodiversity of zooplankton decreased. (4) All the ecosystem service pairs had high trade-off relationships, and water depuration service always had a relatively higher benefit than other services.
Key words:  lake ecosystem services  ecosystem services  change characteristics  trade-off relationships
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