延安市退耕对生态的影响及其人文驱动因素分析
发布时间：2019-05-29 16:47
【摘要】：在对延安市生态退耕特征分析的基础上,阐释了其对生态系统服务功能的影响,并借助STIRPAT模型探究了生态退耕过程中耕地面积变化与其人文驱动因素的定量关系。研究表明:2000—2013年延安市以耕地、林地、草地为主要景观类型,而耕地面积大幅度减少,林地、草地面积稳步增加,且耕地主要转化为林地、草地,分别占其转出量的28.627%,66.664%;延安市2000—2013年生态服务价值稳步增加,增长率为7.624%,年均增长量为1.416亿元,而耕地、草地、林地生态系统服务价值贡献率依次递增,建设用地比重逐渐增大,水域及荒漠则波动变化,且单项生态系统服务功能值变异系数逐渐降低,各项生态服务功能呈现均衡化发展趋势;人口数量增加、社会经济增长、产业结构调整对耕地面积减少具有积极作用,而非农业人口数量增加及农村经济水平提升能够促进耕地面积的增加,各驱动因素综合影响着耕地面积变化及生态退耕过程与生态系统结构,并对区域生态系统服务功能影响显著。
[Abstract]:Based on the analysis of the characteristics of ecological conversion of cropland in Yan'an City, this paper explains its influence on the service function of ecosystem, and probes into the quantitative relationship between the change of cultivated land area and its human driving factors in the process of ecological conversion of cropland with the help of STIRPAT model. The results showed that cultivated land, forest land and grassland were the main landscape types in Yan'an City from 2000 to 2013, while the area of cultivated land decreased greatly, the area of forest land and grassland increased steadily, and the cultivated land was mainly transformed into forest land and grassland. It accounted for 28.627% and 66.664% of the total, respectively. From 2000 to 2013, the value of ecological service in Yan'an City increased steadily, with a growth rate of 7.624% and an average annual growth rate of 141.6 million yuan, while the contribution rate of ecosystem service value of cultivated land, grassland and forest land increased in turn, and the proportion of construction land increased gradually. The water area and desert fluctuate, and the coefficient of variation of the service function value of the single ecosystem decreases gradually, and the ecological service function shows the trend of balanced development. The increase of population, social and economic growth and the adjustment of industrial structure play a positive role in the decrease of cultivated land area, while the increase of non-agricultural population and the improvement of rural economic level can promote the increase of cultivated land area. The driving factors affect the change of cultivated land area, the process of ecological conversion of farmland and the structure of ecosystem, and have a significant impact on the service function of regional ecosystem.
【作者单位】： 东北农业大学资源与环境学院;中国科学院地理科学与资源研究所;
【基金】：国家“十二五”科技支撑计划项目“空心村快速调查识别与整治关键技术研究”(2014BAL01B01)
【分类号】：S181
，
本文编号：2488067
[Abstract]:Based on the analysis of the characteristics of ecological conversion of cropland in Yan'an City, this paper explains its influence on the service function of ecosystem, and probes into the quantitative relationship between the change of cultivated land area and its human driving factors in the process of ecological conversion of cropland with the help of STIRPAT model. The results showed that cultivated land, forest land and grassland were the main landscape types in Yan'an City from 2000 to 2013, while the area of cultivated land decreased greatly, the area of forest land and grassland increased steadily, and the cultivated land was mainly transformed into forest land and grassland. It accounted for 28.627% and 66.664% of the total, respectively. From 2000 to 2013, the value of ecological service in Yan'an City increased steadily, with a growth rate of 7.624% and an average annual growth rate of 141.6 million yuan, while the contribution rate of ecosystem service value of cultivated land, grassland and forest land increased in turn, and the proportion of construction land increased gradually. The water area and desert fluctuate, and the coefficient of variation of the service function value of the single ecosystem decreases gradually, and the ecological service function shows the trend of balanced development. The increase of population, social and economic growth and the adjustment of industrial structure play a positive role in the decrease of cultivated land area, while the increase of non-agricultural population and the improvement of rural economic level can promote the increase of cultivated land area. The driving factors affect the change of cultivated land area, the process of ecological conversion of farmland and the structure of ecosystem, and have a significant impact on the service function of regional ecosystem.
【作者单位】： 东北农业大学资源与环境学院;中国科学院地理科学与资源研究所;
【基金】：国家“十二五”科技支撑计划项目“空心村快速调查识别与整治关键技术研究”(2014BAL01B01)
【分类号】：S181
，
本文编号：2488067
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