伊犁河谷土地利用变化对生态服务价值的影响

发布时间：2018-11-15 19:06

【摘要】：基于1990-2014年4期TM遥感影像解译方法,分析了国家重点水土开发区-新疆伊犁河谷25年来土地利用和生态系统服务价值的变化。结果表明:(1)1990-2014年间,伊犁河谷耕地、居工用地及水体面积有所增加,耕地增长率高达59.3%,林地、草地及未利用地面积减少,草地以104.69km~2/年的速度减少;(2)近25年来研究区土地利用程度指数、信息熵及均衡度均有所上升,表明这一时期土地利用系统的无序化越来越剧烈,系统不稳定性增强,危及伊犁河流域的生态安全;(3)研究区生态服务价值总体有所上升,25年来增加75.26×10~8元,上升了17.13%,特克斯县的增幅最大,约为20.66%,而伊宁市生态服务价值出现下降,幅度达到18.52%。研究区生态经济的发展已处于协调水平的边缘,需要加强对生态环境的保护力度。
[Abstract]:Based on the interpretation of TM remote sensing images from 1990 to 2014, the changes of land use and ecosystem service value in the Yili River Valley, Xinjiang, during the past 25 years were analyzed. The results are as follows: (1) from 1990 to 2014, the cultivated land, residential land and water body area of Yili River Valley increased, the cultivated land growth rate was as high as 59.3%, the area of woodland, grassland and unused land decreased, and the grassland decreased at the rate of 104.69km~2/ year; (2) the index of land use degree, the information entropy and the degree of equilibrium have increased in the last 25 years, which indicates that the disorder of land use system is becoming more and more violent and the instability of the system is increasing in this period, which endangers the ecological security of the Yili River basin; (3) the value of ecological services in the study area has increased to some extent, with an increase of 75.26 脳 10 ~ (8) yuan in the past 25 years, an increase of 17.13 yuan, and the largest increase of 20.66 in Tex County, while the value of ecological services in Yining City has declined. The range was 18.52. The development of ecological economy in the research area is on the edge of coordination level, so it is necessary to strengthen the protection of ecological environment.
【作者单位】：新疆农业大学草业与环境科学学院;中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室;
【基金】：国家自然科学基金项目(编号:31360571) 国家科技支撑计划项目(编号:2014BAC15B03)
【分类号】：F301.2;X171

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