Forest succession trajectories after fi res in valleys and on slopes in the Greater Khingan Mountains,China  

作　　者：Chao Zhong Meng Guo Fenfen Zhou Jianuo Li Fangbing Yu Futao Guo Wenshan Li 

机构地区：[1]Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains,Ministry of Education,School of Geographical Sciences,Northeast Normal University,Changchun 130024,People’s Republic of China [2]College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,People’s Republic of China [3]Huzhong Nature Reserve Administration of Heilongjiang Province,Huzhong 165033,People’s Republic of China

出　　处：《Journal of Forestry Research》2023年第3期623-640,共18页林业研究（英文版）

基　　金：funded by the National Natural Science Foundation of China(No.41871103).

摘　　要：Accurate assessment of postfire vegetation recovery is important for forest management and the conservation of species diversity.Topography is an important factor aff ecting vegetation recovery but whether species composition varies with diff erent recovery stages and between valleys and slopes is unclear.Using fi eld data and a space-for-time substitution method,we quantifi ed species richness and diversity to obtain the successional trajectories of valleys and slopes.We surveyed the species of 10 burned areas from 1986 to 2010 in the Greater Khingan Mountains in northeastern China,and found that with increasing postfi re recovery time,species richness in both valleys and slopes gradually decreased.However,species richness in valleys was relatively higher.Shrubs recovered rapidly in the valleys,and species diversity maximized approximately 11 years after fi re.However,it maximized 17–18 years after fi re on the slopes.Numerous shade-tolerant species were present in the valleys 11 years after fi re but not until after 18 years on slopes.Larch appeared earlier than 11 years after fi re and its recovery was slow in the valleys but appeared quickly on slopes and established dominance early.Our study provides some new insights into vegetation succession after fi re at local scales.After fi re,the vegetation recovery processes diff er with topography and it aff ects the initial rate of recovery and species composition at diff erent successional stages.

关 键 词：Vegetation recovery Valleys and slopes Space-for-time substitution Species richness/diversity/composition Greater Khingan Mountains 

分 类 号：S762[农业科学—森林保护学]