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.
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.
作者
冯久格
李谦维
梁晨
张晓雅
乐艺
高俊琴
FENG Jiuge;LI Qianwei;LIANG Chen;ZHANG Xiaoya;YUE Yi;GAO Junqin(School of Ecology and Nature Conservation,Beijing Forestry University,100083,Beijing,China;The Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration,100083,Beijing,China)
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第1期12-21,共10页
Journal of Beijing Normal University(Natural Science)
基金
国家重点研发计划资助项目(2017YFC0505903)。
关键词
水文连通性
重要斑块
季节变化
黄河口湿地
hydrological connectivity
important patch
seasonal change
Yellow River Delta
作者简介
通信作者: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。
