| Dariyaboyi oasis, located in the hinterland of the Taklamakan Desert, is currentlythe only relatively "primitive" state "natural oasis". Residents of the Dariyaboyi oasisrely on populus, shrub, grass communities. This original request is a nature living life.Literature after the1950s indicates that the oasis environmental degradated gradually.And the environmental degradation has threatened to Dariyaboyi oasis fragileecosystem stability and local residents’ life. Ecosystem Services Valuation is animportant way for ecosystem function evaluation. Ecosystem is composed ofcommunities. Because community Degradation Succession, which needs a process. Itis lack of sensitivity while determining changes in Dariyaboyi Oasis ecosystemfunction from the external community in a limited period of time changes. First,degradation of ecosystems is reflected in the decline in community biomass,indicating changes in the value of ecosystem services using biomass change. Theninferring the oasis ecosystem services changes may be a relatively more accuratemethod.In the present study, the spatial distribution of different plant communities,biomass surveys in Dariyaboyi oasis was investigated to show oasis spatialdistribution of plant communities and biomass using remote sensing data inverseion.Refered to previous research results, Dariyaboyi Oasis desert ecosystem service valueevaluation carried out mainly the following conclusions:(1) This study firstly processed field investigation of oasis vegetation inDariyaboyi Oasis, with42plots investigated. These investigation plots divided intosix typical community types: Phragmites communis, Tamarix community, Populuscommunity, A. sparsifolia community, Smartweed Park communities and Glycyrrhizasub-communities. The oasis vegetation consisted of10families,14genera and16species. All of them are angiosperms. The main vegetation types of the study area arethe poplar, shrubs and grass. (2) GIS DEM digital elevation data was used to divide Dariyaboyi Oasiswatershed. With the use of small watershed as a comprehensive evaluation of thethesis analysis unit, the present study gets the oasis area as1450150.92hm~2.(3) Digitized poplar, shrubs, grass, and the spatial distribution of vegetation,using high-resolution images from Google Earth data, were inputed into ArcGIS. Thefield sample space and remote sensing data were matched for biomass oasis Inversion.By regression analysis, the spectral reflectance model, a wide range of inversion byDariyaboyi oasis poplar, shrubs, grass biomass and spatial distribution, the totalbiomass Dariyaboyi oasis vegetation was calculated as759037.75t.(4) Refered to the value of ecosystem services biomass factors modified formulaby Xie Gaodi, total value of ecosystem services of Dariyaboyi was11.8×108yuan.The total value of ecosystem services of tree-shrub was2.614×108million. The totalvalue of ecosystem services of grassland was9.193×10~8.(5) The intangible services of populus-shrub ecosystem were7times higher thanthe tangible material production material production services. The intangible servicesof grassland were79times higher than the tangible material production materialproduction services. It can be concluded that the greatest value of an oasis vegetationecosystems is its social or ecological benefits.This paper considers oasis vegetation characteristics of Dariyaboyi to build abiomass-based Dariyaboyi oasis ecosystem services valuation model to conduct thevalue of ecosystem services of Dariyaboyi oasis vegetation. In the present study, thevalue of ecosystem services was derived from biomass. The evaluation method notonly reflected the changes of value of ecosystem services due to changes ofecosystem types, but also tried to use this method to get a more accurate calculationwithin the same ecosystem type of biomass differences reflect different timefunctional differences between ecosystem services. This study estimates the futureDariyaboyi oasis of vegetation in accordance with the value of ecosystem services evaluation to provide some basic research data and methods available for laterreference relevant aspects of the study. |
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