藏北草地退化与生态服务功能价值损失评估——以申扎县为例

发布时间：2017-12-31 08:02

本文关键词：藏北草地退化与生态服务功能价值损失评估——以申扎县为例　出处：《生态学报》2016年16期 　论文类型：期刊论文

【摘要】：藏北草地是我国重要的畜牧业生产基地和生态安全屏障。基于遥感和GIS技术,利用1990、2000、2010年3期不同时相的TM、ETM+和CEBERS遥感影像,对申扎县草地资源退化状况进行了遥感监测,并采用生态经济学评估模型对草地生态系统8个方面的服务功能价值损失进行了评估测算。结果表明:1990—2010年,申扎县草地退化面积增加了47.40×10~4hm~2,生态系统服务功能价值损失高达5.20×10~8元;其中1990—2000年,草地退化较严重,该时段也是生态系统服务功能价值损失较多的时期;2000—2010年,草地退化趋势变缓。藏北草地提供生物量价值仅约占生态系统服务功能总价值的7.0%,草地生态服务功能远大于其提供的生物量价值,因此必须从生态服务功能的的理念出发去经营草地,从而实现草地的可持续发展。
[Abstract]:Grassland in northern Tibet is an important animal husbandry production base and ecological security barrier in China. Based on remote sensing and GIS technology, the TM of three different phases was used in 1990 / 2000, 2010. The degradation of grassland resources in Shenza County was monitored by remote sensing images of ETM and CEBERS. The loss of service function value in 8 aspects of grassland ecosystem was evaluated by using ecological economics assessment model. The results showed that the value loss of service function in 8 aspects of grassland ecosystem was from 1990 to 2010. The degraded area of grassland in Shenza County increased by 47.40 脳 10 ~ (-4) h ~ (-2), and the loss of ecosystem service function value was as high as 5.20 脳 10 ~ (8) yuan. From 1990 to 2000, grassland degradation was more serious, which was also the period of the loss of ecosystem service value. From 2000 to 2010, the trend of grassland degradation slowed down. The biomass value of grassland in northern Tibet only accounted for 7.0% of the total value of ecosystem service function. The ecological service function of grassland is far greater than the biomass value provided by it, so it is necessary to manage grassland from the concept of ecological service function so as to realize the sustainable development of grassland.
【作者单位】：西华师范大学国土资源学院;四川科技职工大学;
【基金】：国家自然科学基金资助项目(40972225)
【分类号】：S812
【正文快照】： ×104hm2,with light degradation accounting for 40.02%,and moderate and severe degradation accounting for 22.19%and 8.08%,respectively.Grassland degradation was intensified in the period from 1990 to 2000,with the total degradationincreasing by 64.79×104

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