不同火灾强度下森林植被的自然恢复

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Abstract

The fire caused by thunder in AerShan in 1998 has created forest patches in a damage gradient. Based on the orientation to the burned sites, forests were divided into centrally burned , marginally burned, underground fire and control forest. In addition, forests were divided into pure Larix gmelinii forests, pure Betula platyphylla forests and mixed forests of these two tree species. The plant species diversity, aboveground biomass and annual rings of trees and shrubs were evaluated from July to September 2008. We found that the provided classification standard could reflect the differences in vegetation rehabilitation status of forests after different fire intensities. Forests in centrally burned areas had the lowest plant richness, diversity and aboveground biomass. Underground fire areas showed rather low indices for these variables. In addition to the control stands, forests in marginally burned areas showed the highest investigated indices. Annual rings of trees and shrubs decreased with the increase of fire intensity. The mixed forests had a better resilience than the pure forests, and L.gmelinii showed a better resilience than B.platyphylla. Two herb species were chosen as representatives of heliophytes and sciophytes. By comparing the cover of these two herbs, the succession of vegetation was examined and found that the centrally burned forests are in the gap phase, the underground fire forests in building phase while the marginally burned forests in mature phase. Restorative measures to use following fires were developed. Further study was proposed for the relationship between the aboveground biomass of understory and forest primary production, the breadth and distribution of annual ring, as well as the arthropod community in forests.

Key words： fire intensity damage gradient forest vegetation natural rehabilitation Larix Betula

Received: 25 June 2010

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	Articles by authors
	LI Jing
	SHI Juan
	QI Peng
	LUO You-qing
	HELI?VAARAKari

Cite this article:

LI Jing,SHI Juan,QI Peng, et al. The effect of fire intensity on the natural rehabilitation of forest vegetation[J]. , 2010, 29(3): 193-199.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2010/V29/I3/193

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