Understory vascular plant community assembly in relation to time-since-fire and environmental variables in a Chinese boreal forest  

作　　者：LIU Bo YANG Jian Jill F.JOHNSTONE 

机构地区：[1]Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences [3]Department of Forestry, TP Cooper Building, University of Kentucky [4]Department of Biology, University of Saskatchewan

出　　处：《Journal of Mountain Science》2017年第7期1317-1328,共12页山地科学学报（英文）

基　　金：funded by the National Natural Science Foundation of China (Grant Nos. 31270511, 41501200)

摘　　要：Understanding the response of understory vegetation to fire disturbance is vital to biodiversity conservation and management of boreal forests. We surveyed understory vascular plant richness and composition, and measured related environmental variables along a toposequence within three successional stages, initial （3 years post-fire）, early （13 years post-fire） and late （〉1oo years post-fire） successional stages. Using permutation multivariate ANOVA and nonmetric multidimensional scaling, we analyzed how understory species richness and composition change as time-since-fire proceeds, and their correlative relationships with environmental variables. Species richness and composition showed significant differences among the three successional stages. Understory species richness and abundance were significantly associated with time-since-fire, topographic position, elevation and organic layer depth. Among these variables, time-since-fire had the strongest effect and topographic position was the second major factor on affecting understorycommunity assembly. In overwhelmed the effects addition, time-since-fire of soil pH in the initial successional stage and gravimetric soil moisture in early and late successional stages on understory species composition

关 键 词：Understory richness Composition Firedisturbance SUCCESSION Great Xing＇an Mountains ORDINATION 

分 类 号：S718.5[农业科学—林学]