2000—2020年喀什地区景观格局变化特征

Change Characteristics of Landscape Pattern in Kashgar Region from 2000 to 2020

利用喀什地区2000、2010和2020年Landsat-7影像数据,结合GIS技术分析喀什地区2000—2020年景观格局变化特征。结果表明,2000—2020年,耕地、林地和草地景观破碎化程度较高,林地、草地和水域景观趋于不稳定状态,耕地、林地和水域最大斑块指数上升,耕地、林地和草地景观不规则性较高,耕地、林地、草地和水域各景观类型之间的联系较为复杂;2000—2020年景观动态变化分析发现,研究区景观破碎化程度较大,景观形状趋于复杂,景观多样性、稳定性和景观格局的异质性呈上升趋势;各景观类型优势度分析发现,研究区受人为活动干扰作用相对较强且对环境的调控能力较弱。

The Landsat-7 image data of Kashgar in 2000,2010 and 2020 were used to analyze the change characteristics of landscape pattern in Kashgar from 2000 to 2020 combined with GIS technology.The results showed that from 2000 to 2020,the landscape fragmentation of culti⁃vated land,forest land and grassland was relatively high,the landscape of forest land,grassland and water area tended to be unstable,the maxi⁃mum patch index of cultivated land,forest land and water area had increased,the landscape irregularity of cultivated land,forest land and grass⁃land was relatively high,the relationship between various landscape types of cultivated land,forest land,grassland,and water area was relatively complex.The analysis of landscape dynamic changes from 2000 to 2020 found that the degree of landscape fragmentation in the study area was relatively high,the landscape shape tended to be complex,and the diversity,stability and heterogeneity of landscape pattern were on the rise.A⁃nalysis of the dominance of various landscape types found that the study area was relatively strong interfered by human activities and had weak ability to regulate the environment.