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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Nature
2025
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| Soggetti: | |
| Accesso online: | https://pubmed.ncbi.nlm.nih.gov/40307554/ |
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Sommario:
- Plant diversity dynamics over space and time in a warming Arctic. García Criado, Mariana Myers-Smith, Isla H Bjorkman, Anne D Elmendorf, Sarah C Normand, Signe Aastrup, Peter Aerts, Rien Alatalo, Juha M Baeten, Lander Björk, Robert G Björkman, Mats P Boulanger-Lapointe, Noémie Butler, Ethan E Cooper, Elisabeth J Cornelissen, J Hans C Daskalova, Gergana N Fadrique, Belen Forbes, Bruce C Henry, Greg H R Hollister, Robert D Høye, Toke Thomas Jacobsen, Ida Bomholt Dyrholm Jägerbrand, Annika K Jónsdóttir, Ingibjörg S Kaarlejärvi, Elina Khitun, Olga Klanderud, Kari Kolari, Tiina H M Lang, Simone I Lecomte, Nicolas Lenoir, Jonathan Macek, Petr Messier, Julie Michelsen, Anders Molau, Ulf Muscarella, Robert Nielsen, Marie-Louise Petit Bon, Matteo Post, Eric Raundrup, Katrine Rinnan, Riikka Rixen, Christian Ryde, Ingvild Serra-Diaz, Josep M Schaepman-Strub, Gabriela Schmidt, Niels M Schrodt, Franziska Sjögersten, Sofie Steinbauer, Manuel J Stewart, Lærke Strandberg, Beate Tolvanen, Anne Tweedie, Craig E Vellend, Mark Arctic Regions Biodiversity Plants Global Warming Temperature Time Factors Ecosystem Spatio-Temporal Analysis The Arctic is warming four times faster than the global average and plant communities are responding through shifts in species abundance, composition and distribution. However, the direction and magnitude of local changes in plant diversity in the Arctic have not been quantified. Using a compilation of 42,234 records of 490 vascular plant species from 2,174 plots across the Arctic, here we quantified temporal changes in species richness and composition through repeat surveys between 1981 and 2022. We also identified the geographical, climatic and biotic drivers behind these changes. We found greater species richness at lower latitudes and warmer sites, but no indication that, on average, species richness had changed directionally over time. However, species turnover was widespread, with 59% of plots gaining and/or losing species. Proportions of species gains and losses were greater where temperatures had increased the most. Shrub expansion, particularly of erect shrubs, was associated with greater species losses and decreasing species richness. Despite changes in plant composition, Arctic plant communities did not become more similar to each other, suggesting no biotic homogenization so far. Overall, Arctic plant communities changed in richness and composition in different directions, with temperature and plant-plant interactions emerging as the main drivers of change. Our findings demonstrate how climate and biotic drivers can act in concert to alter plant composition, which could precede future biodiversity changes that are likely to affect ecosystem function, wildlife habitats and the livelihoods of Arctic peoples.