FENG Jianmin,WEN Qi,GUO Lingxia.Effects of Land Use Change on the Ecosystem Service Value in Ecotone of Wind and Sand—A Case Study in Yulin City[J].Research of Soil and Water Conservation,2018,25(04):304-308.
风沙过渡区土地利用变化对生态系统服务价值的影响——以榆林市为例
- Title:
- Effects of Land Use Change on the Ecosystem Service Value in Ecotone of Wind and Sand—A Case Study in Yulin City
- Keywords:
- land use change; ecosystem service value; Yulin City
- 分类号:
- F301.2;X171;F062.2
- 摘要:
- 基于1990年、2000年、2010年和2015年TM/ETM遥感影像解译数据，借助遥感和GIS方法，分析了榆林市近25年的土地利用变化特征，并结合研究区实际情况，在对生态服务价值当量修订的基础上，计算了研究区生态服务价值及变化趋势。结果表明：近25年来，榆林市土地利用变化剧烈，草地、林地、建设用地面积呈增加趋势，而耕地、未利用地、水域面积呈减少趋势。这种变化，特别是水域面积减少和建设用地面积的增加，造成了生态服务总价值尤其是废物处理、水源涵养、食物生产3项服务功能显著减少，生态服务总价值从133.84亿元减少到132.35亿元，减少了1.49亿元。水体对研究区生态环境起非常重要的作用，因而在未来的土地利用中要特别注意对水体的保护。
- Abstract:
- Based on the land use change information obtained from TM/ETM images in 1990, 2000, 2010 and 2015, using the method and mode about ecological value estimation, we analyzed the change rule of land use and its effects on the ecosystem service value in recent 25 years in Yulin City. The results showed that grassland, cultivated land, unused land and woodland were the main land use types, and the areas of grassland, woodland, building land presented the increasing tendency while cultivated land, unused area, water area decreased during 1990—2015. This changes, in particular decrease of water area and increase of building land, has caused the ecosystem services value to decrease, especial for the decrease of ecosystem services value of waste disposal, water conservation and food production, the ecosystem service value has decreased from 13 384 million to 13 235 million yuan, reduced by 149 million yuan in the study period. Water area is the key to protection of the ecological environment, therefore, with respect to the future land use, we must specially focus on protection of the water bodies.
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备注/Memo
收稿日期:2016-10-12;改回日期:2017-09-12。
基金项目:国家自然科学基金（41261040，41661042）；陕西省重点学科专项资金建设项目（0602）；陕西省教育厅专项科研计划项目（15JK1785）
作者简介:封建民(1972-),男,陕西凤翔人,博士,教授,主要从事环境遥感与土地利用研究。E-mail:feng_jianmin@aliyun.com