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 

作者机构：Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Forestry TP Cooper Building University of Kentucky Department of Biology University of Saskatchewan 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2017年第14卷第7期

页      面：1317-1328页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 09[农学] 0303[法学-社会学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0705[理学-地理学] 0815[工学-水利工程] 0903[农学-农业资源与环境] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0704[理学-天文学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

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

主　　题：森林火灾 环境变量 中国北方 植物群落 物种丰富度 生物多样性保护 演替阶段 种类组成 

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(100 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 addition, time-since-fire overwhelmed the effects of soil pH in the initial successional stage and gravimetric soil moisture in early and late successional stages on understory species