摘要
应用1989—2010年三期遥感影像,研究南瓮河国家级自然保护区景观格局演变特征。结果表明,森林是景观基质,草本沼泽是主体斑块,景观异质性较大;2000—2010年景观格局变化呈快速变化趋势,景观基质生态功能弱化,草本沼泽面积21年来首次超过森林;森林群落面积萎缩率高达34.02%,主要转化为森林沼泽;森林沼泽和道路面积增长率最大,分别达到80.94%和64.29%;景观斑块形状趋于复杂化,破碎化加剧,景观破碎化指数从1989年的0.245 3上升至2010年的0.449 8;火是最主要的驱动因子,道路修建、气候变化是重要的驱动因素。
Evolution characteristics of landscape pattern of Nanwenghe National Nature Reserve were studied by u-sing TM/ETM images to analyze the dynamic characteristics of wetland from 1 989 to 2010.Result shows that forest is the landscape matrix;herbaceous swamp occupied the dominant position;landscape heterogeneity are greater. Landscape pattern changes show trend of rapid change during the period of 2000 -2010.The ecological function of landscape matrix is weakening;area of herbaceous swamp exceeds the forest at the first time in 2010 since 21 years. Forest community area shrink ratios achieve 34.02%,which mainly converted to forest swamp.Forest swamp and road area increase the largest,being 80.94% ＆amp; 64.29% respectively;the community of forest was fragmented sig-nificantly,patch shape tended to be complex,landscape fragmentation index increase from 0.245 3 in 1 989 to 0.449 8 in 2010;fire is the main driving force;road construction and climate change are important driving factors.
出处
《防护林科技》
2015年第7期18-21,共4页
Protection Forest Science and Technology
基金
国家公益性行业专项经费项目(201004074)
关键词
寒温带
湿地
景观变化
驱动力
cold temperate zone
wetland
changes of landscape
driving forces
cold temperate zone
wetland
changes of landscape
driving forces
