石漠化综合治理区景观格局时空变化及生态系统服务价值分析

Temporal and spatial changes of landscape pattern and analysis ofecosystem service value in rocky desertification comprehensive control area

为定量分析石漠化综合治理区景观格局的动态变化及其对生态系统服务价值的影响,以毕节撒拉溪石漠化综合治理区2010年和2019年2期遥感影像为数据源,运用ENVI、ArcGIS软件和Fragstats4.2景观指数软件分析研究区景观格局的时空变化特征,采用“当量因子法”估算研究区生态系统服务价值。结果表明:(1)研究期示范区面积增加最多的景观类型是有林地,面积减少最多的景观类型是耕地。(2)研究期示范区整体景观从破碎化、不规则向高连通性发展,总体表现集聚形态。(3)研究期生态系统服务价值总量呈升高趋势,灌木林地贡献值最大,有林地增加值最高,耕地减少量最多。(4)生态系统服务价值总量最大的土地利用景观类型是灌木林地,其次是有林地,最小的是未利用地。

In order to quantitatively analyze the dynamic changes of the landscape pattern in the comprehensive control area of rocky desertification and its impact on the ecosystem service value,the 2010 and 2019 remote sensing images of the comprehensive control area of Bijie Salaxi rocky desertification area are used as the data sources,this paper uses ENVI,ArcGIS software and Fragstats4.2 landscape index software to analyze the spatio-temporal change characteristics of the landscape pattern in the study area and uses the"equivalent factor method"to estimate the ecosystem service value of the study area.The results show that:(1)From 2010 to 2019,the largest increase in area of each landscape type in the demonstration area is forested land,while the largest decrease in area is cultivated land.(2)During the study period,the overall landscape of the demonstration area develops from fragmentation and irregularity to high connectivity,and the overall appearance shows aggregation state.(3)The total value of ecosystem services during the study period shows an upward trend,with shrubland having the largest contribution value,forest land having the highest added value,and cultivated land decreasing the most.(4)The largest total ecosystem service value of different landscape types for land use is shrubland,followed by forest land,and the smallest is unused land.