Abstract
Abstract. The ecosystem service value is an important concept and an index that reflects the quality of the regional ecological environment status and the measurement of the total ecological benefits. In this study, based on the characteristics of land use and the types of ecosystem in the studied area, the ecological indicators including the net primary productivity of the vegetation and the vegetation cover were selected. Landsat TM remote sensing image, ground-based observation, meteorological data and statistical data etc. were applied to establish the remote sensing-based assessment criteria and assessment model for quantitative estimation of the ecosystem service value. The established assessment criteria and model were applied to conduct the quantitative calculation on the value of the single ecosystem service and the ecosystem service value per unit area. The results indicated that during the decade of 2000–2010, with the inter-conversion of different types of land use, the total value of the ecological service in the studied area displayed a gradually decreasing trend. Among which, the values of ecological service of the cultivation land, wetland and the total ecological service were reduced by 11.92, 11.75 and 5.74%, respectively. While the values of ecological services of forest land, waters and intertidal zone were increased to certain extend. However, these increased values did not change the continuously decreasing trend of the total value of ecosystem service in the studied area. Based on these assessments, the spatially- and temporally-changing patterns of the values of ecosystem service in the studied area were analysed to reveal their intrinsic relationship between the land use and the changes in values of ecosystem service.
Highlights
Ecosystem service refers to the important benefits arising from the naturally functioning ecosystem and its compositions for supporting the survival and development of human beings [1]
Category is the services with direct value, the products of ecosystem, i.e. the ecosystem provides human beings with raw materials, food, and medicines etc., which have the direct commercialization functions; and the second category is the service with indirect values, i.e. the environment that support and maintain the survival and development of human beings, such as the functions of ecosystem on reservation of water resources, regulation of climate, conservation of soil and water, renew and maintenance of soil fertility and cycle of nutrients etc., which hardly have the direct commercialization functions [1, 2]
The reduction in value of ecological service of the cultivation-use land was mainly due to the reason that during the recent years the rapid social and economic development in the studied area led to the continuing occupancy of the construction-used land on the cultivation land, making the area of cultivation land use substantially reduced
Summary
Ecosystem service refers to the important benefits arising from the naturally functioning ecosystem and its compositions for supporting the survival and development of human beings [1]. Category is the services with direct value, the products of ecosystem, i.e. the ecosystem provides human beings with raw materials, food, and medicines etc., which have the direct commercialization functions; and the second category is the service with indirect values, i.e. the environment that support and maintain the survival and development of human beings, such as the functions of ecosystem on reservation of water resources, regulation of climate, conservation of soil and water, renew and maintenance of soil fertility and cycle of nutrients etc., which hardly have the direct commercialization functions [1, 2]. From the perspective of macro-ecology and based on the characteristics of the estimated service values of the ecosystem in the remote-sensed region, we defined the evaluation indexes of services value of ecosystem through using the remote sensing technique.
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