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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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滇西北生态脆弱区土地利用变化及其生态效应——以云南省永胜县为例
DOI: 10.11821/xb200404018, PP. 629-638
Keywords: 土地利用变化,生态效应,生态脆弱区,云南省永胜县
Abstract:
土地利用/土地覆被变化及其生态环境效应研究是当前地理学全球变化研究的核心内容，而生态系统服务功能则是生态学、生态经济学研究的热点问题。作者利用滇西北生态脆弱区——永胜县1988年、1994年和1999年的TM遥感影像，采用景观生态学的空间格局指数分析研究区近10年来的土地利用动态变化特征，并以生态系统服务功能衡量相应土地利用类型的相对生态价值，评价区域土地利用/土地覆被变化的生态效应，尝试将二者有机结合起来。研究表明，全县景观总体构成表现为景观破碎度较高，斑块数目较多；林地和未利用地一直占很大比重，林地的不断增加与未利用地的迅速减少是研究时段内土地利用变化的突出特征；研究时段内全县土地利用变化带来了较好的生态效应，土地利用生态效益持续提高，并表现出了较大的空间差异。
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