Postfire succession of larch forest in the northern slope of Daxinganling

Abstract

Abstract: With method of deducing time series from spatial series for vegetation succession,we analyzed the vegetational dynamics in Huzhong burned area of Daxinganling in recent 20 years.The results showed that the number of species,especially herbs,increased rapidly in the burned area soon after fire.But as time went on,the number of herbs decreased obviously,with great composition change,and coverage declination.Conversely,the coverage of shrubs and trees increased gradually,but the number of species and composition did not vary significantly.Throughout succession,the ratio of high frequency species was high and increasing,which did not obviously conform to Raunkiaer's law of frequency that the ratio of high frequency species was low in relatively steady communities.In addition,the similarities of shrubs in different burned areas were higher than those of herbs.The similarities of herbs in the burned area of close years were higher than those in the burned area of distant years.There was no obvious rule among the similarities of shrub species in the burned area of various years.

Key words: Fargesia denudata, Density, Biomass distribution pattern

CLC Number:

S718

WANG Xugao, LI Xiuzhen, HE Hongshi, LENG Wenfang, WEN Qingchun. Postfire succession of larch forest in the northern slope of Daxinganling[J]. cje, 2004, (5): 35-41.

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