城市化进程区农业生态系统正负服务测算——以长安区为例

Abstract

Abstract: Agricultural production activities bring benefits and negative effects on human beings,a comprehensive evaluation of agricultural ecological system and servicesis important for agricultural sustainable development and agricultural ecological service management.Based on TM remotely sensed images,field surveys and socioeconomic statistics,this study analyzed the positive and negative services and their patterns in the agro-ecosystem of Chang'an District in Xi'an,Shaanxi Province,China,and defined the concept of the negative agro-ecosystem services,using the theories and methods in the ecological system services research,and Erdasand ArcGIS10.1 software platform.The results showed as follows:(1) The net value of agro-ecosystem services were 33.36×10⁸ Yuan dominated by the positive ecosystem services. (2) From the location perspective,the value of positive ecosystem services formed a pattern of zonal distribution with the lower values in the central areas and higher values in the fringe regions while for the negative ecosystem services,it showed an opposite layout.The net agro-ecosystem services constituted a cross distribution with "surface","belt" and "dot" where the "surface" was referred to the forest land with large area and positive value of net services,and the "belt" was referred to the cultivated land or campus with relatively large area and negative value of net services,and the "dot" was also referred to the cultivated land or campus but with relatively small area and negative value of net services. (3) Compared with the study focused only on the positive services,this study investigated both the positive and negative services of agro-ecosystem services which can better reflect the actual capacity of agro-ecosystem and the benefit to mankind.

Key words: agro-ecosystem, net ayro-ecosystem services, positive and negative ecosystem services, Chang'an District

CLC Number:

S181

ZHANG Ni, ZHOU Zhong-xue. Positive and negative agro-ecosystem services evaluation in urbanizing area:A case study of Chang'an District[J].干旱区地理, 2018, 41(2): 409-419.

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Positive and negative agro-ecosystem services evaluation in urbanizing area:A case study of Chang'an District

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