Study On The Processes Of Anthropogenic Geomorphology And The Changes Of Ecosystem Service Value

With the global economic and social development of high speed and dwindling land resources,strategic choice view of coastal countries and regions have turned to the coast and the blue harbor economy.As coastal frontier and hotspot of regional development,the original natural landscape has been replaced by the anthropogenic geomorphology,artificial surface and the evolution of ecological environment is facing unprecedented pressure the economic and social activities,and the study of data based on 3S to improve,coastal resources and environmental problems caused by human activities has gradually become the focus of domestic and foreign scholars and government managers concerned.This paper a case study with Xiangshangang Bay,China and Tampa Bay,USA,with Landsat TM/OLI remote sensing images of four periods as the data source from 1985 to 2015,by means of GIS analysis of the two bay basin anthropogenic geomorphology agent and distribution principle analysis,attempts to extend the features from the anthropogenic geomorphology.Anthropogenic geomorphology process rule expounds the expansion process and anthropogenic geomorphology life cycle in bay basin,and the changes of the ecosystem services value of the two bay basin were analyzed.The main conclusions are as follows:(1)Since the human world under the background of global change,the superposition of economic and social development,technical conditions of related engineering and technical progress factor and other human activities on land surface evolution,natural foundation,human needs,such as artificial force factors in different control principle,the bay basin anthropogenic geomorphology have different functions.Man made the spatial and temporal differences of appearance technology and regional management with regional functional properties and morphology characterization,including anthropogenic geomorphology with city characteristics and coastal features.(2)The complexity of anthropogenic geomorphologysystem determines the diversity of anthropogenic geomorphologylandscape expansion,its development process needs to study relationship between social development and environmental changes as the core,from the aspects of spatial and temporal scales,attributes are described.Geographical area of anthropogenic geomorphologyexpansion,forms and information contained in the content is different in space different scale.Whether the regional expansion of anthropogenic geomorphology,landscape expansion characteristics,expansion of the role of different ways or morphological characteristics,is a process from one stable state to another stable state.(3)Nearly 30 years of farmland of Xiangshangang Bay basin watershed ecosystem changes greatly,the proportion decreased from 23.76% in 1985 to 17.76% in 2015,while the proportion of the Tampa Bay basin during the period from 24.39% to 22.19%,the change area of ecological types of Xiangshangang Bay basin followed by farmland>the city>water body>Forest>Wetland>desert.The area change of ecological types of the Tampa Bay basin followed by farmland>desert>city>forest>wetland>water.In addition,the ecological types of two bay basin pattern also appeared spatial differentiation.(4)Dynamic changes of ecosystem service value of Xiangshangang Bay basin is 5.58%,or larger,the value of ecosystem services decreased the ecological types including farmland,wetlands and forests.The dynamic changes of ecosystem service value in the Tampa Bay basin is 0.72%,or less,the value of ecosystem services decreased the ecological types include desert,farmland,forest,water and wetland from 1985 to 2015.(5)With the ability to strengthen and expand the scope of geomorphological development and utilization,in promoting human intervention and other non conventional natural evolution factors,a large number of ecological system is in a bad condition.The Xiangshangang Bayneed to strengthen the study of nature,self regulation threshold in different ecological system of semi natural and artificial,in order to maintain the normal operation on the basis of the matrix.The ecological value of the spatial characteristics of the Tampa Bay basin shows that the ecological value distribution and natural geographical conditions,the significant positive correlation between the level of regional economic development in the global ecosystem service value two bay basin Moran's Iestimates are negative,and the test result was significant.