Scale Effect of Relationship Between Forest Landscape Pattern and Environmental Factors in the Tianbaoyan Nature Reserve, China
Analyzing on the relationship between environmental elements and landscape pattern contributes to the changing mechanism of landscape pattern. Based on TM image, topographic map and the second class investigation, and by means of 3S technology, the relationships between forest landscape pattern and environment factors were analyzed quantitatively with CCA (Canonical Correspondence Analysis) in the Tianbaoyan National Natural Reserve, China. The results showed that the total Eigen value of ordination axes were 3.137, 3.349, 3.484, 4.660 and 4.848, respectively, increasing with the downscaling. However, both the cumulative percentage variance of landscape-environment relation and landscape-environment correlation coefficients first increased and then decreased, with the maximum values at scale3 and scale2, respectively. The landscape presented an obvious latitude variation (the correlation coefficients between latitude and first axis were -0.2019-0.3789) and vertical distribution regularity (the correlation coefficients between elevation and first axis were -0.3218-0.4760) . The latitudinal gradient distribution regularity was as follows: bamboo grove, deciduous broad leaved forest, mixed broadleaf-conifer forest, farmland, evergreen broadleaf forest, mountaintop elfin forest, evergreen coniferous forest, sphagnum moss, shrub-meadow. Bamboo grove and farmland distributed at low elevation comparing with sphagnum moss, shrub-meadow and mountaintop elfin forest at high elevation. It is suggested that the relationship between landscape and environment have scale effect, and the environmental elements have different impacts on landscape pattern at different scales. Fig 2, Tab 2, Ref 36
forest landscape patternenvironmental factorCCAscale effectTianbaoyan National Nature Reserve CLC Q948.1
NETL
NSTL
万方数据
维普
