Vegetation structure along the altitudinal gradient at the treeline of Mount Paektu,North Korea |
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Authors: | Miroslav Šrůtek Jiří Kolbek |
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Affiliation: | (1) Institute of Botany, Department of Plant Ecology, Academy of Sciences of the Czech Republic, Dukelká 145, CZ-379 82 Treboň, Czech Republic;(2) Institute of Botany, Department of Geobotany, Academy of Sciences of the Czech Republic, CZ-252 43 Průhonice near Prague, Czech Republic |
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Abstract: | Vegetation structure of the treeline was studied on the southeastern slope of Mount Paektu (North Korea). Fifteen temporary plots (20m×20m) were situated along the altitudinal transect. Seven square samples (phytosociological relevés 5 m×5 m) were analyzed in each plot. Although the character of the vegetation was rather continuous altitudinally, five similar groups of vegetation samples were distinguished by the TWINSPAN procedure. The distribution of samples in the classification showed not only the effect of altitude but also the effect of competition between the tree and the shrub layers and other factors. In the canonical correspondence analysis (CCA) ordination several environmental variables were used (such as altitude of each plot, distance of each plot from the forest edge and the cover percentage of tree, shrub, herb and moss/lichen layers). The variable ‘cover of tree layer’ had the strongest relation to the species data. Continuous changes of species richness along the altitude were confirmed. Species richness decreased significantly with altitude. |
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Keywords: | CCA ordination forest-alpine tundra ecotone Larix olgensis plant communities species richness TWINSPAN classification old volcano |
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