Position of Betula ermanii population ecotone in Changbai Mountains

Abstract

Abstract: The vegetation on the northern slope of Changbai Mountains forms a vertical zone due to the vertical differentiation of moisture and heat conditions.Ecotones are obviously existed between different vegetation zones,but it is difficult to decide their positions.In the area from 1 400 m to 2 200 m elevation,we adopted the methods of gradient sampling,fractal analysis,population pattern analysis,and interspecific competition index analysis to describe Betula ermanii population ecotone.The results showed that there was a forest ecotone between Betula ermanii and Picea-Abies forest near elevation 1 650 m,and there was a forest line ecotone between Betula ermanii and alpine tundra near elevation 2 080 m.

Key words: Changbai Mountains, Betula ermanii, Ecotone, Position

CLC Number:

Q948

ZOU Chunjing, WANG Xiaochun, HAN Shijie . Position of Betula ermanii population ecotone in Changbai Mountains[J]. Chinese Journal of Applied Ecology, 2004, (12): 2217-2220.

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