doi:10.12202/j.0476-0301.2020427冯久格¹,
李谦维¹,
梁晨¹,
张晓雅¹,
乐艺¹,
高俊琴^{1, 2,,}
1.北京林业大学生态与自然保护学院， 100083，北京
2.黄河流域生态保护国家林业和草原局重点实验室， 100083，北京
基金项目:国家重点研发计划资助项目(2017YFC0505903)

详细信息

通讯作者:高俊琴（1978—），博士，教授. 研究方向：湿地生态过程与湿地修复. E-mail:gaojq@bjfu.edu.cn

中图分类号:X143

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出版历程

收稿日期:2020-10-21
网络出版日期:2021-01-21
刊出日期:2021-02-01

Landscape index analysis of hydrological connectivity dynamics in the Yellow River Delta

Jiuge FENG¹,
Qianwei LI¹,
Chen LIANG¹,
Xiaoya ZHANG¹,
Yi YUE¹,
Junqin GAO^{1, 2,,}
1. School of Ecology and Nature Conservation, Beijing Forestry University, 100083, Beijing, China
2. The Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration, 100083, Beijing, China



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摘要
摘要:基于2019年逐月Sentinel-2遥感影像，采用基于图论的景观连通度指数，分析了黄河口湿地水文连通的年内动态变化及水文连通频率变化，计算了不同湿地斑块的重要性指数，评估了水文连通的分布格局．结果表明：黄河口湿地水文连通具有明显的季节变化特征，汛期和生态补水期的水文连通整体增加；湿地斑块的重要性指数分布特征与水文连通频率分布特征较为一致，水文连通性较高；连通频率高的斑块主要分布在黄河南岸恢复区、近海潮滩与主潮沟，这些区域对整个研究区的水文连通起到重要作用．该研究结果可为黄河口湿地生态保护与修复提供参考．
关键词:水文连通性/
重要斑块/
季节变化/
黄河口湿地
Abstract:Characterization of wetland hydrological connectivity is important to maintain and restore structure and function of wetland ecosystem．Sentinel-2 remote sensing images obtained monthly in 2019 were used to examine hydrological connectivity changes and frequency in the Yellow River Delta, and to analyze important patches using a graph theory-based landscape connectivity index．Hydrological connectivity in the Yellow River Delta was found to have undergone marked seasonal changes．Flood season and ecological water compensation were found to increase overall hydrological connectivity．Importance index distribution was found consistent with hydrological connectivity frequency．Patches with higher hydrological connectivity and frequency were found mainly distributed in recovery area on the south shore, in offshore tidal flats and main tidal ditches．These data would help ecological protection and restoration in the Yellow River Delta．
Key words:hydrological connectivity/
important patch/
seasonal change/
Yellow River Delta