Relationships between charcoal property and post fire productivity in the boreal forest  

作　　者：Lei Gao David Pare Flavia Lega Braghiroli Mathieu Lamarche Yves Bergeron 

机构地区：[1]Forest Research Institute,Universite du Quebec en Abitibi-Temiscamingue,Rouyn-Noranda,QC,J9X 5E4,Canada [2]Forest Research Center,Universite du Quebec a Montreal,Montreal,QC,H3C 3P8,Canada [3]Canadian Forest Service,Natural Resources Canada,Laurentian Forestry Centre,Quebec City,QC,G1V 4C7,Canada [4]Department of Biological Sciences,Universite du Quebec a Montreal,Montreal,QC,H3C 3P8,Canada

出　　处：《Forest Ecosystems》2025年第2期201-208,共8页森林生态系统(英文版)

基　　金：supported by the MITACS Accelerate grant with Greenfirst,industry partner in La Sarre,QC,Canada.

摘　　要：Fire disturbances are increasing under global climate change and ecological transformations of forests are occurring.Specifically,shifts from productive closed-canopy feather moss forests to low-productivity open-canopy lichen(Cladonia spp.)woodlands have been observed in boreal forests of eastern Canada.It has been hypothesized that high severity of fires would be the cause of this change,but this is difficult to validate a posteriori on mature forest stands.Because charcoal properties are affected by fire severity,we have put forward the hypothesis that the amount and physicochemical properties of charcoal(C,N,H,O,ash,surface area)would be different and indicative of a greater fire severity for open-canopy forests compared to closed canopy ones.Our hypothesis was partly validated in that the amount of charcoal found on the ground of closed-canopy forests was greater than that of open-canopy forests.However,the physicochemical properties were not different,albeit a greater variability of charcoal properties for open canopy stands.These results do not allow us to fully validate or reject our hypothesis on the role of fire severity in the shift between open and closed canopy stands.However,they suggest that the variability in fire conditions as well as the amounts of charcoal produced are different between the two ecosystem types.Furthermore,considering the role that biochar may play in improving soil conditions and promoting vegetation restoration,our results suggest that charcoal may play a role in maintaining these two stable alternative ecosystem states.

关 键 词：Charcoal Feather moss LICHEN Fire legacy Forest ecosystem Boreal fores 

分 类 号：S762.3[农业科学—森林保护学]