| With the deepening of the contradiction between man and land,the competition between the human society and the ecological environment becomes more and more serious.To understand and grasp the development of the natural ecological system and its evolution through the ecosystem services for human society to create value,find the mechanism of interaction between human and ecological system,is the foundation of improving the relationship between man and nature and realizing the sustainable development.The transition zone of ecological sensitivity and ecological fragility is faced with the double challenges of economic development and ecological environment protection.The transition zone between plain and mountain is one of the typical regions.But at present,there is little research on this area in China,so it is necessary to strengthen the research on ecosystem service function and value.This paper combines the National Natural Science Foundation,Chengdu and Longmen mountain plain transition zone as the study area,with 2000 a,2007 a,2008 a,2015 a Landsat TM/ETM+ images as the data source,using the remote sensing and GIS combination of technical methods,relying on the Ministry of Education Key Laboratory and provincial land and resources collaborative innovation center research platform,with ARCGIS 10,ENVI 5.1,Fragstats4.2 and other related software.The change of landscape spatial pattern characteristics of different landform types in the area on the two aspects of the patch type level and landscape level;NPP,NDVI,FVC as the basis of ecological parameters,construction of ecosystem service value of the study area estimation model,time variation analysis of ecosystem service value of the study area of the pattern and spatial distribution characteristics;finally from nature control factors and human disturbance factors,driving factors,in-depth analysis of the value of ecosystem services in the study area and its changes.The results show that:(1)On the whole,the landscape pattern of the study area is relatively stable.Woodland and farmland landscape are the main landscape of the study area.The proportion of grassland and unused land landscape area is the least.From the level of patch type,the density of the patch density of the construction land landscape in the alpine area was higher than that of the 15 a,and the density of the forest land,construction land and cultivated land increased in the plain area.From the view of landscape level,the landscape fragmentation of the study area in 15 a has been deepened to some extent,and human activities have been expanding to the hills and low mountains.(2)The total ecosystem services in the study area of 2000 a,2007 a,2008 a and 2015 a were 86.73×109yuan,893.06×109yuan,82.81×109yuan,and 102.18×109yuan.The total value of ecosystem services from 2000 to 2015 15 years increased by 15.45×109yuan.(3)From different ecosystem types,the ecosystem services value of the study area,the ecosystem type with the largest amount of service value is the forest landscape,and the least value is the unused landscape;from different ecosystem services,15 a,the service value of gas regulation function is the largest,and the service value of air purification function is the least;from the study area 4 period distribution of ecosystem services the value of space,the ecosystem service value of higher area of main layout in the central region of the study area,irregular strip distribution.The layout of the low value area mainly shows the land use as the unused land and the construction land.(4)The ecosystem service function and its value are the manifestation of the interaction between natural control factors and human social activities.Different natural control factors have different performance characteristics,and then affect the spatial distribution of ecosystem services value.The impact of human disturbance on ecosystem service value is mainly reflected in the low value area of ecosystem service value. |
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