Beneficial effects of climate warming on boreal tree growth may be transitory


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D’Orangeville, Loïc, Houle, Daniel, Duchesne, Louis, Phillips, Richard P., Bergeron, Yves et Kneeshaw, Daniel (2018). Beneficial effects of climate warming on boreal tree growth may be transitory. Nature Communications , 9 (1). doi:10.1038/s41467-018-05705-4 Repéré dans Depositum à

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Predicted increases in temperature and aridity across the boreal forest region have the potential to alter timber supply and carbon sequestration. Given the widely-observed variation in species sensitivity to climate, there is an urgent need to develop species-specific predictive models that can account for local conditions. Here, we matched the growth of 270,000 trees across a 761,100 km2 region with detailed site-level data to quantify the growth responses of the seven most common boreal tree species in Eastern Canada to changes in climate. Accounting for spatially-explicit species-specific responses, we find that while 2 °C of warming may increase overall forest productivity by 13 ± 3% (mean ± SE) in the absence of disturbance, additional warming could reverse this trend and lead to substantial declines exacerbated by reductions in water availability. Our results confirm the transitory nature of warming-induced growth benefits in the boreal forest and highlight the vulnerability of the ecosystem to excess warming and drying.

Type de document: Article
Informations complémentaires: Licence d'utilisation : CC-BY 4.0
Mots-clés libres: boreal forest; carbon sequestration; climate change; growth response; hydrocarbon seep; vulnerability; water availability
Divisions: Forêts
Date de dépôt: 11 mai 2020 18:36
Dernière modification: 11 mai 2020 18:36

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