Positive feedbacks and alternative stable states in forest leaf types

Zou Yibiao, Zohner Constantin M., Averill Colin, Ma Haozhi, Merder Julian, Berdugo Miguel, Bialic-Murphy Lalasia, Mo Lidong, Brun Philipp, Zimmermann Niklaus E., Liang Jingjing, de-Miguel Sergio, Nabuurs Gert-Jan, Reich Peter B., Niinements Ulo, Dahlgren Jonas, Kändler Gerald, Ratcliffe Sophia, Ruiz-Benito Paloma, De Zaval Miguel Angel, GFBI consortium, Crowther Thomas W., Birnbaum Philippe, Derroire Géraldine, Dourdain Aurélie, Herault Bruno, Sist Plinio, Marcon Eric, et al.. 2024. Positive feedbacks and alternative stable states in forest leaf types. Nature Communications, 15:4658, 15 p.

Url - jeu de données - Entrepôt autre : https://doi.org/10.5281/zenodo.11038631

Résumé : The emergence of alternative stable states in forest systems has significant implications for the functioning and structure of the terrestrial biosphere, yet empirical evidence remains scarce. Here, we combine global forest biodiversity observations and simulations to test for alternative stable states in the presence of evergreen and deciduous forest types. We reveal a bimodal distribution of forest leaf types across temperate regions of the Northern Hemisphere that cannot be explained by the environment alone, suggesting signatures of alternative forest states. Moreover, we empirically demonstrate the existence of positive feedbacks in tree growth, recruitment and mortality, with trees having 4–43% higher growth rates, 14–17% higher survival rates and 4–7 times higher recruitment rates when they are surrounded by trees of their own leaf type. Simulations show that the observed positive feedbacks are necessary and sufficient to generate alternative forest states, which also lead to dependency on history (hysteresis) during ecosystem transition from evergreen to deciduous forests and vice versa. We identify hotspots of bistable forest types in evergreen-deciduous ecotones, which are likely driven by soil-related positive feedbacks. These findings are integral to predicting the distribution of forest biomes, and aid to our understanding of biodiversity, carbon turnover, and terrestrial climate feedbacks.

Mots-clés Agrovoc : biodiversité, modélisation environnementale, modèle de simulation, impact sur l'environnement, biodiversité forestière, phénologie, séquestration du carbone, forêt, écosystème forestier, forêt tropicale humide, écotone, inventaire forestier, facteur du milieu, accroissement du diamètre

Mots-clés géographiques Agrovoc : France

Auteurs et affiliations

• Zou Yibiao, ETH (CHE) - auteur correspondant
• Zohner Constantin M., ETH (CHE)
• Averill Colin, ETH (CHE)
• Ma Haozhi, ETH (CHE)
• Merder Julian, Carnegie Institution for Science (USA)
• Berdugo Miguel, ETH (CHE)
• Bialic-Murphy Lalasia, ETH (CHE)
• Mo Lidong, ETH (CHE)
• Brun Philipp, WSL (CHE)
• Zimmermann Niklaus E., Swiss Federal Research Institute (CHE)
• Liang Jingjing, Purdue University (USA)
• de-Miguel Sergio, Universitat de Lleida (ESP)
• Nabuurs Gert-Jan, Wageningen University (NLD)
• Reich Peter B., University of Minnesota (USA)
• Niinements Ulo, Estonian University of Life Sciences (EST)
• Dahlgren Jonas, Swedish University of Agricultural Sciences (SWE)
• Kändler Gerald, Forstliche Versuchs- und Forschungsanstalt Baden-Württemberg (DEU)
• Ratcliffe Sophia, NBN Trust (GBR)
• Ruiz-Benito Paloma, Universidad de Alcalá (ESP)
• De Zaval Miguel Angel, Universidad de Alcalá (ESP)
• GFBI consortium
• Crowther Thomas W., ETH (CHE)
• Birnbaum Philippe, CIRAD-BIOS-UMR AMAP (FRA)
• Derroire Géraldine, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0001-7239-2881
• Dourdain Aurélie, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0002-6847-0434
• Herault Bruno, CIRAD-ES-UPR Forêts et sociétés (FRA) ORCID: 0000-0002-6950-7286
• Sist Plinio, CIRAD-ES-UPR Forêts et sociétés (FRA)
• Marcon Eric, CIRAD-BIOS-UMR AMAP (FRA)
• et al.

Source : Cirad-Agritrop (https://agritrop.cirad.fr/610154/)

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