巢湖水陆交错带生态服务价值梯度分析

doi:10.11870/cjlyzyyhj201509018

摘要/Abstract

摘要： 基于巢湖水陆交错带1995、2000、2007和2013年4期遥感影像提取土地利用信息,参考前人的相关研究成果,测算研究区的生态服务价值。在综合研究区实际情况和相关研究基础上采用等距离缓冲带法,对研究区生态服务价值的梯度变化进行研究。结果表明:(1)各土地利用类型的梯度变化在不同时期有较为一致的变化趋势,在不同的缓冲带内都有1~2个贡献率较大的土地利用类型;(2)在研究期内各缓冲带生态服务价值处于基本平稳的状态,其中缓冲带1到缓冲带2的变化幅度较大;(3)从生态服务价值的空间分布来看,缓冲带1的生态服务价值始终最高,外层的缓冲带5和缓冲带6由低等级到中等级平稳过度,缓冲带3和缓冲带4则始终处在低水平;(4)林地和水域对生态服务价值的贡献率与距巢湖水陆边界的距离有显著的相关性,表明林地和水域对研究区生态服务价值的影响大。

关键词: 水陆交错带, 土地利用, 生态服务价值, 梯度分析, GIS&RS, 巢湖

Abstract: Lake-land ecotone is a main type of ecological ecotone, which has an important role in reducing water on soil erosion degree, water conservation and water quality improvement and providing habitats for different creatures. In the Lake-land ecotone, human activities have a significant effect. Unreasonable way of production and living and land use, will destroy the ecosystem stability of the Lake-land ecotone, to make the ecological environment of itself and the affected area become fragile. Regarding the chaohu Lake-land ecotone as the research object, with the aid of remote sensing technology, we extracted land use data of the four periods in the study area. Based on the results of ecosystem service value research of Constanza, Xie gaodi and other scholars, we measured the value of ecosystem services in the study area, and used GIS spatial analysis and improved moving window method to study the ecological service value gradient change. Six windows were divided from the study area base on the land use data extract from remote sensing images in 1995, 2000, 2007 and 2013, which were 0-500 m, 500-1 000 m, 1 000-1 500 m, 1 500-2 000 m, 2 000-2 500 m and 2 500-3 000 m. We analyzed the gradient change of ecosystem service value among the different windows based on an improved moving window method. Results showed: (1) Cultivated land, forested land and water area make significant contribution to the ecosystem services value of the Chaohu lake-land ecotone. The contribution rate of various land use type had a consistent changing trend in different periods, and always had 1 or 2 land use types contributing significantly in every sub buffers. (2) The ecological service value of each window maintained a steady state from 1995 to 2013 except that suffer zone 1 to suffer zone 2 had a large change. (3) From 1995 to 2103, ecological service value of the buffer of suffer zone 1 was always highest one and the outermost sub buffer of suffer zone 6 had been at the medium level, the middle two at low levels, and suffer zone 5 & 6 from low level to mid-range excessive steadily. (4)A significant correlation between the contribution of forest land and waters ecological service value and the far of Chaohu water-land boundary, show that forest land and waters have obvious impact on the ecological service value in the study area.

Key words: land-lake ecotone, land use, ecosystem services value, gradient analysis, GIS&RS, Chaohu lake

中图分类号:

F301.2

姚飞, 陈龙乾, 张宇, 吴沛瑶, 张红梅, 王秉义. 巢湖水陆交错带生态服务价值梯度分析[J]. 长江流域资源与环境, 2015, 24(09): 1568-1576.

YAO Fei, CHEN Long-qian, ZHANG Yu, WU Pei-yao, ZHANG Hong-mei, WANG Bing-yi. Gradient analysis of the ecosystem service value in the chaohu lake-land ecotone[J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2015, 24(09): 1568-1576.

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