Hordijk I. auteur aut IRD Bialic-Murphy L. auteur aut IRD Lauber T. auteur aut IRD Routh D. auteur aut IRD Poorter L. auteur aut IRD Rivers M. C. auteur aut IRD ter Steege H. auteur aut IRD Liang J. J. auteur aut IRD Reich P. B. auteur aut IRD de-Miguel S. auteur aut IRD Nabuurs G. J. auteur aut IRD Gamarra J. G. P. auteur aut IRD Chen H. Y. H. auteur aut IRD Zhou M. auteur aut IRD Wiser S. K. auteur aut IRD Pretzsch H. auteur aut IRD Paquette A. auteur aut IRD Picard N. auteur aut IRD Hérault B. auteur aut IRD Bastin J. F. auteur aut IRD Alberti G. auteur aut IRD Abegg M. auteur aut IRD Adou Yao Y. C. auteur aut IRD Zambrano A. M. A.. auteur aut IRD Ibanez Thomas auteur aut IRD Maynard D. S. auteur aut IRD Crowther T. W. auteur aut IRD et al. auteur aut IRD text journalArticle eng text/pdf reformatted digital access AimEcological and anthropogenic factors shift the abundances of dominant and rare tree species within local forest communities, thus affecting species composition and ecosystem functioning. To inform forest and conservation management it is important to understand the drivers of dominance and rarity in local tree communities. We answer the following research questions: (1) What are the patterns of dominance and rarity in tree communities? (2) Which ecological and anthropogenic factors predict these patterns? And (3) what is the extinction risk of locally dominant and rare tree species? Location Global.Time period1990-2017. Major taxa studiedTrees. MethodsWe used 1.2 million forest plots and quantified local tree dominance as the relative plot basal area of the single most dominant species and local rarity as the percentage of species that contribute together to the least 10% of plot basal area. We mapped global community dominance and rarity using machine learning models and evaluated the ecological and anthropogenic predictors with linear models. Extinction risk, for example threatened status, of geographically widespread dominant and rare species was evaluated. Results Community dominance and rarity show contrasting latitudinal trends, with boreal forests having high levels of dominance and tropical forests having high levels of rarity. Increasing annual precipitation reduces community dominance, probably because precipitation is related to an increase in tree density and richness. Additionally, stand age is positively related to community dominance, due to stem diameter increase of the most dominant species. Surprisingly, we find that locally dominant and rare species, which are geographically widespread in our data, have an equally high rate of elevated extinction due to declining populations through large-scale land degradation.Main conclusionsBy linking patterns and predictors of community dominance and rarity to extinction risk, our results suggest that also widespread species should be considered in large-scale management and conservation practices. specialized community dominance environmental predictors forests macroecology rarity species abundance species population threats MONDE 082 076 33 10 e13889 [21 ] 2024 1466-822X https://www.documentation.ird.fr/hor/fdi:010091110 10.1111/geb.13889 1466-822X [F B010091110] https://www.documentation.ird.fr/hor/fdi:010091110 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2024-09/010091110.pdf IRD - Base Horizon / Pleins textes 2024-09-27 2025-11-06 fdi:010091110 fre