Characterizing Forest Fragments in Boreal, Temperate, and Tropical Ecosystems.
Authors:
Meddens, Arjan J.H. Hudak, Andrew T. Evans, Jeffrey S. Gould, William A. Gonzalez, Grizelle USDA, FS
Source:
Ambio. 2008 Dec., v. 37, issue 7-8, p. 569-576.
NALT Subjects:
forest habitats forest ecosystems habitat fragmentation boreal forests temperate forests tropical forests forest types spatial data landscape ecology remote sensing image analysis spectral analysis Landsat satellites computer software data analysis population density climatic factors anthropogenic activities roads precipitation classification land use vegetation structure
Other Subjects:
FRAGSTATS moisture gradient
Issue Date:
Dec-2008
Abstract:
An increased ability to analyze landscapes in a spatial manner through the use of remote sensing leads to improved capabilities for quantifying human-induced forest fragmentation. Developments of spatially explicit methods in landscape analyses are emerging. In this paper, the image delineation software program eCognition and the spatial pattern analysis program FRAGSTATS were used to quantify patterns of forest fragments on six landscapes across three different climatic regions characterized by different moisture regimes and different influences of human pressure. Our results support the idea that landscapes with higher road and population density are more fragmented; however, there are other, equally influential factors contributing to fragmentation, such as moisture regime, historic land use, and fire dynamics. Our method provided an objective means to characterize landscapes and assess patterns of forest fragments across different forested ecosystems by addressing the limitations of pixel-based classification and incorporating image objects.
