Global fading of the temperature–growth coupling at alpine and polar treelines. Camarero, J. J., Gazol, A., Sánchez-Salguero, R., Fajardo, A., McIntire, E. J. B., Gutiérrez, E., Batllori, E., Boudreau, S., Carrer, M., Diez, J., Dufour-Tremblay, G., Gaire, N. P., Hofgaard, A., Jomelli, V., Kirdyanov, A. V., Lévesque, E., Liang, E., Linares, J. C., Mathisen, I. E., Moiseev, P. A., Sangüesa-Barreda, G., Shrestha, K. B., Toivonen, J. M., Tutubalina, O. V., & Wilmking, M. Global Change Biology, 27(9):1879–1889, 2021. 46 citations (Crossref) [2024-01-10] 31 citations (Semantic Scholar/DOI) [2023-09-19] _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15530
Global fading of the temperature–growth coupling at alpine and polar treelines [link]Paper  doi  abstract   bibtex   
Climate warming is expected to positively alter upward and poleward treelines which are controlled by low temperature and a short growing season. Despite the importance of treelines as a bioassay of climate change, a global field assessment and posterior forecasting of tree growth at annual scales is lacking. Using annually resolved tree-ring data located across Eurasia and the Americas, we quantified and modeled the relationship between temperature and radial growth at treeline during the 20th century. We then tested whether this temperature–growth association will remain stable during the 21st century using a forward model under two climate scenarios (RCP 4.5 and 8.5). During the 20th century, growth enhancements were common in most sites, and temperature and growth showed positive trends. Interestingly, the relationship between temperature and growth trends was contingent on tree age suggesting biogeographic patterns in treeline growth are contingent on local factors besides climate warming. Simulations forecast temperature–growth decoupling during the 21st century. The growing season at treeline is projected to lengthen and growth rates would increase and become less dependent on temperature rise. These forecasts illustrate how growth may decouple from climate warming in cold regions and near the margins of tree existence. Such projected temperature–growth decoupling could impact ecosystem processes in mountain and polar biomes, with feedbacks on climate warming.
@article{camarero_global_2021,
	title = {Global fading of the temperature–growth coupling at alpine and polar treelines},
	volume = {27},
	issn = {1365-2486},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.15530},
	doi = {10.1111/gcb.15530},
	abstract = {Climate warming is expected to positively alter upward and poleward treelines which are controlled by low temperature and a short growing season. Despite the importance of treelines as a bioassay of climate change, a global field assessment and posterior forecasting of tree growth at annual scales is lacking. Using annually resolved tree-ring data located across Eurasia and the Americas, we quantified and modeled the relationship between temperature and radial growth at treeline during the 20th century. We then tested whether this temperature–growth association will remain stable during the 21st century using a forward model under two climate scenarios (RCP 4.5 and 8.5). During the 20th century, growth enhancements were common in most sites, and temperature and growth showed positive trends. Interestingly, the relationship between temperature and growth trends was contingent on tree age suggesting biogeographic patterns in treeline growth are contingent on local factors besides climate warming. Simulations forecast temperature–growth decoupling during the 21st century. The growing season at treeline is projected to lengthen and growth rates would increase and become less dependent on temperature rise. These forecasts illustrate how growth may decouple from climate warming in cold regions and near the margins of tree existence. Such projected temperature–growth decoupling could impact ecosystem processes in mountain and polar biomes, with feedbacks on climate warming.},
	language = {en},
	number = {9},
	urldate = {2021-11-15},
	journal = {Global Change Biology},
	author = {Camarero, Jesús Julio and Gazol, Antonio and Sánchez-Salguero, Raúl and Fajardo, Alex and McIntire, Eliot J. B. and Gutiérrez, Emilia and Batllori, Enric and Boudreau, Stéphane and Carrer, Marco and Diez, Jeff and Dufour-Tremblay, Geneviève and Gaire, Narayan P. and Hofgaard, Annika and Jomelli, Vincent and Kirdyanov, Alexander V. and Lévesque, Esther and Liang, Eryuan and Linares, Juan Carlos and Mathisen, Ingrid E. and Moiseev, Pavel A. and Sangüesa-Barreda, Gabriel and Shrestha, Krishna B. and Toivonen, Johanna M. and Tutubalina, Olga V. and Wilmking, Martin},
	year = {2021},
	note = {46 citations (Crossref) [2024-01-10]
31 citations (Semantic Scholar/DOI) [2023-09-19]
\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15530},
	keywords = {climate warming, forest limit, growth model, mountain ecosystems, tree rings},
	pages = {1879--1889},
}
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