Abstract:

Understanding the influence of land use change on ecosystem service value and the interaction relationship has great significance.Land use and land cover change (LUCC) is the important components in global environment change and the important factor causing environment changes all over the world, and is especially significant in rapidly developing regions in the world. Assessment on ecosystem service values based on land use change in Sichuan Provinceis is essential for policy makers to support sustainable development. In this paper, based on referencing to different evaluation methods of the ecosystem service values（ESV）both at home and abroad, the ESV coefficient is revised on the basis of all kinds of ecosystem types, the ESV of different ecosystem types and ecosystem services value in Sichuan Province was calculated，and effect of land use change on the ESV in Sichuan Province was analyzed, using ESV evaluation methods, sensitivity index and value change rate model. The results showed as follows. (1) The farmlands, unused lands, grasslands and water areas were decreased, while forested lands, construction lands and garden plot areas were increased, forested lands and grasslands accounted for more than 69% of the total area in Sichuan Province over the past 10 years. (2) The ESV provided from the forest lands, garden lands ecosystems continued to increase, while the ESV of the farmlands, grasslands, water and unused lands continued to decrease. (3) The spatial pattern of the total ESV was unevenly distributed across the study area, with significant regional differences. The ESV of land use presented spatial distribution pattern that the west area was more than the east area, the total ESV of the western mountain or plateau regions and the mountainous regions surrounding plain in Sichuan Province was bigger, and the total ESV provided by Chengdu plain, Sichuan basin or the hilly region was less. (4) The sensitivity analysis showed that the ESV in study area was inelastic; the forest land area change reflected by the value change rate of the ESV had a great influence. This research helps to understand the mutual relation between the land use and ESV under the background of rapid urbanization, industrialization, and provide scientific basis for the regulation of regional ecological security and ecological environment protection and sustainable development in Sichuan Province.