Rates and patterns of landscape change in the Central Sikhote-alin Mountains, Russian Far East

被引:57
作者
Cushman, SA [1 ]
Wallin, DO [1 ]
机构
[1] Western Washington Univ, Huxley Coll Environm Studies, Ctr Environm Sci, Bellingham, WA 98225 USA
基金
美国国家航空航天局;
关键词
change detection; FRAGSTATS; landscape pattern; remote sensing; Russian Far East; spatial analysis;
D O I
10.1023/A:1008180207109
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
We used Landsat imagery and GIS to quantify the rates and patterns of landscape change between 1972 and 1992 for a 734,126 ha forested study area in the central Sikhote-alin Mountains of the Russian Far East. The study area includes a portion of the Sikhote-alinskiy Biosphere Reserve which is a part of the United Nations international Man and the Biosphere (MAB) reserve network. Wildfire is a major disturbance agent throughout the area and timber harvesting outside the reserve is also important. Maximum likelihood classification of the satellite imagery identified four broad cover types (hardwood, conifer, mixed and non-forest) in 1992 and changes among them between 1972 and 1992. We used multi-temporal principal components analysis to describe the magnitude and direction of landscape change for six watersheds that represent a range of ecological histories and disturbance regimes. Overall, forest cover declined from 90.4% in 1972 to 77.2% in 1992. The disturbance rate was more than twice as high in conifer than in hardwood forests. The rate of disturbance outside the reserve was three times that inside. While the rates of disturbance are not markedly higher than those recorded from other temperate forests, there has recently been a large alteration in the disturbance regime which will lead to a general transformation of forest composition and structure in the study area if the trend continues.
引用
收藏
页码:643 / 659
页数:17
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