摘要
【目的】分析江山仙霞岭省级自然保护区土地覆被动态变化,评估自然保护区生态环境质量状况。【方法】以1991、2001和2021年三期Landsat遥感影像为数据源,采用最大似然法和转移矩阵对江山仙霞岭省级自然保护区土地覆被动态变化及其转变情况进行分析。【结果】(1)最大似然法能够较准确地提取保护区土地覆被类型,总体精度在90%以上,阔叶林易被错分为针叶林。保护区土地覆盖类型以阔叶林为主,其次是针叶林和竹林。(2)1991—2021年,无林地和竹林面积显著减少,分别减少了77.74%和55.91%。阔叶林和针叶林面积显著增加,分别增加了19.26%和114.44%。(3)保护区土地覆被转入和转出面积最大的类型分别是阔叶林和竹林,分别为1 916和1 201 hm^(2);阔叶林增加主要来源于竹林和无林地,两者分别占阔叶林转入总面积的53.08%和30.48%。需要对毛竹林入侵针叶林和阔叶林现象加强管控,避免生物多样性退化。【结论】近30年江山仙霞岭省级自然保护区植被质量显著提升,自然保护区建设为生态环境和生物多样性保护起到重要作用。
【Objectives】The study aimed to analyze the dynamic changes in land cover in Jiangshan Xianxialing Provincial Nature Reserve and evaluate the ecological environment quality of the reserve.【Methods】The dynamic changes and transfer of land covers in the Xianxialing Provincial Nature Reserve were analyzed using the maximum likelihood method and transfer matrix based on Landsat remote sensing images in 1991,2001,and 2021.【Results】(1)The maximum likelihood method can accurately extract land cover types in the nature reserve,with an overall accuracy of over 90%.Broad-leaved forests were easliy misclassified as coniferous forests.The land cover type of the nature reserve was mainly broad-leaved forests,followed by coniferous forests and bamboo forests.(2)From 1991 to 2021,the area of non-forest land and bamboo forest significantly decreased by 77.74%and 55.91%,respectively.The area of broad-leaved and coniferous forests significantly increased by 19.26%and 114.44%,respectively.The largest transfer in and out of land cover types in the nature reserve were broad-leaved forests and bamboo forests with the 2 areas of 1916 hm and 1201 hm^(2),respectively.(3)The increase in broad-leaved forests mainly came from bamboo forests and non-forest land,accounting for 53.08%and 30.48%of the total increased area of broad-leaved forests,respectively.To avoid biodiversity degradation,it is necessary to strengthen the control of the invasion of bamboo forests into coniferous and broad-leaved forests.【Conclusions】In the past 30 years,the vegetation quality of the Jiangshan Xianxialing Provincial Nature Reserve has significantly improved,and the construction of the nature reserve has played an important role in protecting the ecological environment and biodiversity.
作者
金伟
余著成
徐全
熊胜
王梅芳
陈卓
童哲
JIN Wei;YU Zhucheng;XU Quan;XIONG Sheng;WANG Meifang;CHEN Zhuo;TONG Zhe(Forest Resources Monitoring Center of Zhejiang Province,Hangzhou 311300,China;Xianxialing Provincial Nature Reserve Management Center,Jiangshan 324100,Zhejiang,China;College of Environment and Resource,Zhejiang A&F University,Hangzhou 311300,China;Center for Forest Conservation of Quzhou,Quzhou 324000,Zhejiang,China)
出处
《自然保护地》
CSCD
2024年第4期84-94,共11页
Natural Protected Areas
基金
地方与高校合作项目(H20220226)。
关键词
江山仙霞岭省级自然保护区
土地覆被
遥感监测
动态变化
转移特点
Jiangshan Xianxialing Provincial Nature Reserve
land cover
remote sensing monitoring
dynamic change
transfer characteristics
