生态与农村环境学报2024，Vol.40Issue(6)：766-772,7.DOI:10.19741/j.issn.1673-4831.2024.0104
若尔盖湿地水文连通及重要湿地斑块变化
Analysis of Hydrological Connectivity Dynamic and Important Patches in the Zoige Wetland
摘要
Abstract
Hydrological connectivity plays an important role in the structure and function of wetland ecosystems.In recent years,the Zoige Wetland has experienced varying degrees of degradation due to human activities and climate change,sig-nificantly altering its hydrological connectivity.To quantify changes in hydrological connectivity and identify key wetland patches in the Zoige Wetland,we collected Landsat remote sensing data from 1977 to 2020 and utilized the supervised classification method to extract its wetland patches and analyze their area changes.Also,we employed the landscape con-nectivity index based on the graph theory to analyze the dynamic changes in hydrological connectivity from 1977 to 2020,and the importance index to identify key wetland patches.The results show a reduction of 10.60%in the Zoige Wetland ar-ea from 2 660.50 km2 in 1977 to 2 378.53 km2 in 2016.However,from 2016 to 2020,the wetland area gradually recov-ered to 90.78%of its extent in 1977.The structural and functional connectivity of the Zoige Wetland exhibited a temporal pattern of initial decline followed by subsequent recovery.In 2016,the structural and functional connectivity were 65.51%and 60.73%of its extent in 1977,respectively,and recovered to 70.23%and 72.39%by 2020.Notably,key wetland patches are primarily located within the protected area,suggesting that the ongoing wetland conservation and restoration measures play an important role in restoring the hydrological connectivity of wetlands.关键词
若尔盖湿地/遥感影像/水文连通/重要湿地斑块Key words
Zoige Wetland/remote sensing/hydrological connectivity/key wetland patches分类
资源环境引用本文复制引用
解秦米佳,张钦彦,高俊琴,冯久格,李谦维..若尔盖湿地水文连通及重要湿地斑块变化[J].生态与农村环境学报,2024,40(6):766-772,7.基金项目
国家自然科学基金(42271107) （42271107）
