雁鸣湖自然保护区土地利用与景观格局变化研究

Study on the changes of land use and landscape pattern in Yanming Lake Nature Reserve

以雁鸣湖自然保护区为研究区域,以Landsat遥感影像为基础分析2000年、2005年、2010年和2015年土地利用类型空间分布,通过对遥感影像解译得出景观演变趋势并进行分析.与2000年相比,2015年湿地景观比例上升,非湿地面积占研究区总面积比例下降;各景观变化幅度明显不同,其中林地、高覆盖度草地、水库坑塘、居民点和沼泽地明显增加,灌木林及中覆盖度草地减少;研究时段内研究区景观类型丰富度下降,破碎化程度降低,各景观类型发展呈不均衡化趋势;研究区景观优势度趋于稳定,大斑块向小斑块分裂,斑块离散程度和形状复杂程度有所增加.

The Yanming Lake Nature Reserve was taken as the research area,and based on Landsat remote sensing images,the spatial pattern distribution data of land use types in 2000,2005,2010 and 2015 was obtained.Through the interpretation of remote sensing image in Yanming Lake Nature Reserve,the landscape evolution trend was obtained and analyzed.The results showed that compared with 2000,the proportion of wetland landscape increased in 2015,and the proportion of non wetland area accounted for the research.The proportion of total area decreased,the range of landscape changes was significantly different,among which forest land,high coverage grassland,reservoir pond,residential area and marshland increased significantly,while shrubbery and medium coverage grassland decreased significantly.During the study period,the richness of landscape types decreased,the degree of fragmentation decreased,and the development of each landscape type showed an unbalanced trend.In the study area,the landscape dominance tends to be stable,the large patches continue to split into small patches,and the degree of patch dispersion and shape complexity increases.