若尔盖湿地近25年湿地变化及分形特征分析

摘要

This paper studies the wetland area changing trend of the protected area in the past 25 years, explores the fractal dimension change regulation of the wetland protected area, the spatial variance characteristic of the centroid and the correlation between climate and wetland change, Using of five remote sensing images of Ruoergai Wetland National Nature Reserve, time of 1989, 1995, 2001, 2007 and 2014 year.The results show that in the past 25 years, the protected wetland area overall shows a downward trend, a total reduction area of 52.28 hm2;The protected area is interfered significantly by human factors;The wetland distribution centroid is skewing the northeast;Wetland area change has the maximum correlation with the regional annual average temperature, has the minimum correlation with hours of sunshine.%文章利用若尔盖湿地国家级自然保护区1989、1995、2001、2007和2014年5期遥感影像,研究了近25年保护区湿地面积的变化趋势,探索了保护区湿地分形维数的变化规律、质心的空间变化特征以及气候与湿地变化的相关性.研究结果表明:近25年,保护区湿地面积总体呈下降趋势,总共减少了52.28 hm2;保护区受到人为因素的干扰较大;湿地分布的质心向东北方向偏移;湿地面积变化与区域年平均温度相关性最大,与日照时数相关性最小.