重庆梁平区景观格局演变对生态系统服务价值的影响

景观格局及其变化是生态系统服务价值(ESV)调控的关键因素之一,关系着区域生态安全和可持续发展.以梁平区1999、2009和2018年遥感影像为源数据,运用景观格局指数、ESV评估模型、热点分析等方法研究景观格局和ESV时空变化特征,并在此基础上探讨景观格局演变对ESV的影响.结果 表明:(1) 1999-2018年,...

Impact of Landscape Pattern Change on Ecosystem Service Value in Liangping,Chongqing

Landscape pattern and its change is one of the key factors of ecosystem service value(ESV)regulation and control,which is related to regional ecological security and sustainable development.Based on the remote sensing data of 1999,2009 and 2018 in Liangping district,the dynamic changes of landscape pattern and ESV were studied by means of landscape pattern index,ESV evaluation model and hot spot analysis.And then the impact of landscape pattern evolution on ESV was discussed.The results show that:(1)In Liangping district from 1999 to 2018,the total area of cultivated land and water area showed a decreasing trend,while the area of other landscape types showed an increasing trend;The landscape connectivity decreased,while the degree of landscape fragmentation and spatial heterogeneity increased.(2)The ESV increased by 647 million CNY in the past 19 years.Among all landscape types,forest had the highest ecosystem services.The ESV contribution rate of hydrological regulation was the largest among single ecosystem service value.ESV had some differences in spatial distribution.The high-value area was mainly distributed in the high-altitude forest areas and low-altitude water areas in the east and west of Liangping district.Construction area and cultivated land of low elevation were low-value areas.(3)The ESV was positively correlated with the landscape shape index,landscape diversity index and landscape uniformity index,and negatively correlated with sprawl index,dispersion index and juxtaposition index.The research reveals the relationship between landscape pattern and ESV changes,which provides scientific reference for sustainable development and utilization of resources in Liangping district.