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How can the forest sector mitigate climate change in a changing climate? Case studies of boreal and northern temperate forests in eastern Canada

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forest Ecosystems 2022年第2期9卷 267-287页

作者： Lucas Moreau Evelyne Thiffault Dominic Cyr Yan Boulanger Robert Beauregard Departement des sciences du bois et de la foret Universite LavalQuebecCanada Science and Technology Branch Environment and Climate Change CanadaGatineauCanada Laurentian forestry Centre Natural Resources CanadaQuebecCanada

Background:forest based climate mitigation emerged as a key component of the Paris Agreement,and thus re-quires robust science to reduce uncertainties related to such *** aim of this study was to assess and compare the cumulative effects on carbon dynamics of forest management and climate change on boreal and northern temperate forest sector in eastern Canada for the 2020–2100 ***:We used the spatially explicit forest landscape model LANDIS-II and its extension forest Carbon Suc-cession,in conjunction with the Carbon Budget Model for Harvested Wood Products *** simulated the dynamics of forest composition and carbon flows from forest ecosystems to wood products and their substitution effect on markets under increasing climate forcing,according to a tonne-year *** were con-ducted for a series of forest management scenarios based on realistic practices principally by clearcut in the boreal territory and continuous-cover forestry in the northern temperate *** scenarios included:i)a business-as-usual scenario(BaU),representing the current management strategy,ii)increased harvesting by 6.3%to 13.9%,iii)increased conservation(*** harvesting by 11.1%to 49.8%),iiii)and a scenario representing the natural evolution of the forest landscape(*** any management activity).Results:Our study revealed that increasing harvesting levels had contrasting effects on the mitigation potential in northern temperate(enhance net sequestration)and boreal forest sector(enhance net emissions)in comparison to the BaU from 2040 onwards,regardless of the future *** storage in wood products and the substi-tution effect were not sufficient to offset carbon emissions from ***,climate change had a strong impact on the capacity of both landscapes to act as carbon *** temperate landscapes became a net source of carbon over time due to their greater vulnerability to climate change than boreal landsc

关键词： Climate change Carbon forest sector forest management Boreal landscapes Northern temperate landscape Mitigation potential

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