Dissimilarity of plant communities with changes in altitudes on the northern slope of Changbai Mountain

Abstract

Abstract: From altitude of 700m to 2600m on the northern slope of Changbai Mountain, twenty plots were investigated with an interval of 100 m in altitude.With community dissimilarity index, the dissimilarity among sampling plots at different altitudes was analyzed. The results indicated that dissimilarity between communities showed the same law under different sampling areas when it was over 16m². Several summit values of community dissimilarity index at the altitudes between 700～800m, 1000～1100,1700～1800 and 1900～2000m were exactly the boundary of different vegetation types. The average value of community dissimilarity index linearly decreased with the increasng sampling areas. Dissimilarity Index between communities varied with the altitude difference. When sampling area was 1m² or 4m², Communities dissimilarity index was close to 1 as the altitude difference was over 800m; so was the case when the sampling area was over 16m² as altitude difference was over 1200m. The rate of community dissimilarity index increased with the increasing the altitude difference.

Key words: Metolachlor, S-Metolachlor (Dual Gold), Chiral pesticide, Catalase activity, Soil microorganisms

CLC Number:

Q948

YU Deyong, HAO Zhanqing, JI Lanzhu, LI Yang, XIONG Zaiping, YIE Ji . Dissimilarity of plant communities with changes in altitudes on the northern slope of Changbai Mountain[J]. cje, 2003, (5): 1-5.

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