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

最小化 最大化

Vol14 No.7: 1317-1328

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

Author】LIU Bo 1,2; YANG Jian 3*; Jill F. JOHNSTONE4

Addresses】1 Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China; 3 Department of Forestry, TP Cooper Building, University of Kentucky, Lexington, KY 40546, USA; 4 Department of Biology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada

Corresponding author】jian.yang@uky.edu

Citation】Liu B, Yang J, Johnstone JF (2017) Understory vascular plant community assembly in relation to time-since-fire and environmental variables in a Chinese boreal forest. Journal of Mountain Science 14(7). DOI: 10.1007/s11629-016-4158-1

DOI】10.1007/s11629-016-4158-1

Abstract】Understanding the response of understory vegetation to fire disturbanceis vital to biodiversity conservation and managementof 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 understory community 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 composition

Keywords】Understory richness; Composition; Fire disturbance; Succession; Great Xing'an Mountains; Ordination