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Xinjiang University (2010)

Preliminary Research On Construction And Application Of Eccsystem Services Value Evaluation System On The Landscape Scale In Arid Area

师庆三; Shi Qing San

Titre : Preliminary Research on Construction and Application of Eccsystem Services Value Evaluation System on the Landscape Scale in Arid Area

Auteur : 师庆三; Shi Qing San

Grade : Doctoral Dissertation 2010

Université : Xinjiang University

Résumé partiel
Ecosystem services value is one of the main methods to evaluate eco-environment change. Landscape ecology has the same research object with ecosystem services value. Therefore, it is an effect assessment method, the ecosystem services value evaluation system, to evaluate landscape function change which caused by landscape pattern change. Nevertheless, at present, the ecosystem services value evaluation system, such as Constanza and Xie Gaodi, both of their methods are based on global or great region scale, and their classification for landscape ecosystem which can directly reflect human activities are not perfect, and also the value assessment methods are still under immature development. In arid area, the landscape types and characteristics have obvious differences compared with humid region. So, to explore a scientific and suitable evaluation method and system for evaluating oasis-desert ecosystem services value in arid area is necessarily and urgently.Considering these problems discussed above, based on the predecessor’s achievements, this research focused on next five major topics:1) Some landscape indexes have been relatively analyzed by using multi-periods landscape data of Qitai, Wusu, Shanshan oasises in Xingjing area for demonstrating the relativity relation among these landscape indexes. And then the author discussed the value for the ecological evaluation of typical oasis in arid area from across and longitudinal direction respectively. The Results showed that it is difficult or imprecise in landscape ecology comparison assessment by single landscape pattern indexes. The landscape spatial analysis method should combine ecological processes and other data indexes which can response the real situation, only by this way, the landscape pattern spatial analysis has more practical application value in landscape ecology and eco-environmental assessment.2) Based on MODIS data, combining with the method of remote sensing ecological, we calculated the terrestrial ecological services value of Xinjiang area in 2000a. And then the quantitative relationship between NPP and ecological services value had been approached by statistical method. The results showed that, the total terrestrial ecological services value of Xinjiang area is 8.87105×1011 yuan in 2000a, in which the service value of CO2 fixation is the highest, expiration O2 is second, nutrition circulation is last. The service value varied with different land cover, the forest had the highest service value of 44073.39 yuan·hm-2, and farmland had a higher value of 39100.37 yuan·hm-2, bushes and grassland is also higher than 15000 yuan·hm-2, but the bare or dessert land is only 116.14 yuan·hm-2, the city land is almost 0 yuan·hm-2. The spatial distribution of ecological services value is similar to FVC and NPP, which revealed a high relativity relationship. Conbining with analysis results of the relationship between Ecosystem Service Value and NPP, and relative data from 3 similar cases of other researchers, the author believe that it is a favorable linear correlative relationship between ecosystem services value and NPP. Therefore, it is a relative reliable and feasible approach to fast estimate ecosystem services value from NPP by the support of RS technology.

Mots clés : Landscape ecology; Net primary productivity (NPP); Ecosystem services; Image matting approach; Dynamic evaluation;

Présentation (CNKI)

Page publiée le 19 avril 2013, mise à jour le 2 mai 2018