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Drought‐induced increase in tree mortality and corresponding decrease in the carbon sink capacity of Canada's boreal forests from 1970 to 2020

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Type de ressource
Article de revue
Auteurs/contributeurs
  • Liu, Qiuyu (Auteur)
  • Peng, Changhui (Auteur)
  • Schneider, Robert (Auteur)
  • Cyr, Dominic (Auteur)
  • McDowell, Nate G. (Auteur)
  • Kneeshaw, Daniel (Auteur)
Titre
Drought‐induced increase in tree mortality and corresponding decrease in the carbon sink capacity of Canada's boreal forests from 1970 to 2020
Résumé
Abstract Canada's boreal forests, which occupy approximately 30% of boreal forests worldwide, play an important role in the global carbon budget. However, there is little quantitative information available regarding the spatiotemporal changes in the drought‐induced tree mortality of Canada's boreal forests overall and their associated impacts on biomass carbon dynamics. Here, we develop spatiotemporally explicit estimates of drought‐induced tree mortality and corresponding biomass carbon sink capacity changes in Canada's boreal forests from 1970 to 2020. We show that the average annual tree mortality rate is approximately 2.7%. Approximately 43% of Canada's boreal forests have experienced significantly increasing tree mortality trends (71% of which are located in the western region of the country), and these trends have accelerated since 2002. This increase in tree mortality has resulted in significant biomass carbon losses at an approximate rate of 1.51 ± 0.29 MgC ha −1  year −1 (95% confidence interval) with an approximate total loss of 0.46 ± 0.09 PgC year −1 (95% confidence interval). Under the drought condition increases predicted for this century, the capacity of Canada's boreal forests to act as a carbon sink will be further reduced, potentially leading to a significant positive climate feedback effect.
Publication
Global Change Biology
Volume
29
Numéro
8
Pages
2274-2285
Date
04/2023
Abrév. de revue
Global Change Biology
Langue
en
DOI
10.1111/gcb.16599
ISSN
1354-1013, 1365-2486
URL
https://onlinelibrary.wiley.com/doi/10.1111/gcb.16599
Consulté le
11/11/2024 21:38
Catalogue de bibl.
DOI.org (Crossref)
Référence
Liu, Q., Peng, C., Schneider, R., Cyr, D., McDowell, N. G., & Kneeshaw, D. (2023). Drought‐induced increase in tree mortality and corresponding decrease in the carbon sink capacity of Canada’s boreal forests from 1970 to 2020. Global Change Biology, 29(8), 2274–2285. https://doi.org/10.1111/gcb.16599
Auteur·e·s
  • Peng, Changhui
Lien vers cette notice
https://bibliographies.uqam.ca/escer/bibliographie/BNMDEHP6
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