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[an error occurred while processing this directive]Forest succession trajectories after fires in valleys and on slopes in the Greater Khingan Mountains, China
Received date: 2022-10-12
Accepted date: 2022-12-19
Online published: 2024-10-16
Copyright
Chao Zhong , Meng Guo , Fenfen Zhou , Jianuo Li , Fangbing Yu , Futao Guo , Wenshan Li . [J]. 林业研究(英文版), 2023 , 34(3) : 623 -640 . DOI: 10.1007/s11676-023-01602-9
Accurate assessment of postfire vegetation recovery is important for forest management and the conservation of species diversity. Topography is an important factor affecting vegetation recovery but whether species composition varies with different recovery stages and between valleys and slopes is unclear. Using field data and a space-for-time substitution method, we quantified 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 postfire 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 fire. However, it maximized 17–18 years after fire on the slopes. Numerous shade-tolerant species were present in the valleys 11 years after fire but not until after 18 years on slopes. Larch appeared earlier than 11 years after fire 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 fire at local scales. After fire, the vegetation recovery processes differ with topography and it affects the initial rate of recovery and species composition at different successional stages.
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