Effect of land use and land cover change on ecosystem services in Naidong County on the Tibetan Plateau, China

2012 International Symposium on Geomatics for Integrated Water Resource Management Pub Date : 2012-11-12 DOI:10.1109/GIWRM.2012.6349551

E. Dai, Yunhe Yin, Xiao-shu Cao

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Abstract

Land use and land cover change (LUCC) on a regional scale is one of the major research topics in global climate change studies. In recent years, an increasing number of researchers have highlighted the significance of case studies in understanding LUCC patterns and processes. The Tibetan Plateau ecosystem is a typical fragile ecosystem that is extremely difficult to restore once it is damaged. Thus, studies on LUCC and its effects on the environment have great theoretical and practical significance. In this study, LUCC and changes in ecosystem services in Naidong County on the Tibetan Plateau, China between 1988 and 2000 are investigated. LANDSAT Thematic Mapper (TM) of 1998 and Enhanced Thematic Mapper Plus (ETM+) images of 2000 are used to detect LUCC, and then changes in the values of ecosystem services delivered by each land category are investigated. Finally, the contribution of various ecosystem functions to the overall value of ecosystem services is discussed. The results show that the enhancement of forest areas is the most prominent characteristic of change in land use, specifically the conversion from 659.23 ha of wetlands, 501.51 ha of grasslands, and 163.07 ha of desert to forests from 1988 to 2000 in study area. The total value of ecosystem services in Naidong County declined from yuan 1655.16 million to yuan 1640.21 million between 1988 and 2000. This decrease can be largely attributed to the loss of wetlands (valued at yuan 36.58 million), whereas the ecosystem services value of forests increased by yuan 25.60 million during that period. The sensitivity analysis revealed that the contributions of gas regulation, soil formation and erosion control, biological diversity, and raw materials to the total value of ecosystem services increased over the 12-year period. Moreover, the contributions of waste treatment, water conservation, climate regulation, recreation and culture, and food production significantly decreased during the same period.

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青藏高原乃东县土地利用/覆被变化对生态系统服务的影响

区域尺度上的土地利用与土地覆盖变化是全球气候变化研究的重要内容之一。近年来，越来越多的研究人员强调了案例研究对理解土地利用/土地覆盖变化模式和过程的重要性。青藏高原生态系统是典型的脆弱生态系统，一旦遭到破坏就极难恢复。因此，研究土地利用/土地覆盖变化及其对环境的影响具有重要的理论和现实意义。研究了1988—2000年青藏高原乃东县土地利用/土地覆盖变化及其生态系统服务功能的变化。利用1998年LANDSAT Thematic Mapper (TM)和2000年Enhanced Thematic Mapper Plus (ETM+)影像对土地利用/土地覆盖变化(LUCC)进行检测，分析了不同土地类型提供的生态系统服务价值的变化。最后，讨论了各生态系统功能对生态系统服务总价值的贡献。结果表明:森林面积的增加是土地利用变化最显著的特征，1988 - 2000年研究区湿地面积为659.23 ha，草地面积为501.51 ha，荒漠面积为163.07 ha。1988 - 2000年间，奈东县生态系统服务价值从165516万元下降到164021万元。减少的主要原因是湿地损失(价值3658万元)，而同期森林生态系统服务价值增加2560万元。敏感性分析表明，气体调节、土壤形成和侵蚀控制、生物多样性和原材料对生态系统服务价值的贡献在12 a期间呈上升趋势。此外，废物处理、节水、气候调节、娱乐文化和粮食生产的贡献在同一时期显著下降。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2012 International Symposium on Geomatics for Integrated Water Resource Management

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