Love Thy Neighbour? Tropical Tree Growth and Its Response to Climate Anomalies Is Mediated by Neighbourhood Hierarchy and Dissimilarity in Carbon‐ and Water‐Related Traits

作者：Daniela Nemetschek, Claire Fortunel, Éric Marcon, Johanna Auer, Vincyane Badouard, Christopher Baraloto, Marion Boisseaux, Damien Bonal, Sabrina Coste, Elia Dardevet, Patrick Heuret, Peter Hietz, Sébastien Levionnois, Isabelle Maréchaux, Clément Stahl, Jason Vleminckx, Wolfgang Wanek, Camille Ziegler, Géraldine Derroire · 发表于：Ecology Letters · 年份：2025 · DOI：10.1111/ele.70028 · 被引用次数：9 · 研究领域：Plant Water Relations and Carbon Dynamics、Ecology and Vegetation Dynamics Studies、Remote Sensing in Agriculture

Taxonomic diversity effects on forest productivity and response to climate extremes range from positive to negative, suggesting a key role for complex interactions among neighbouring trees. To elucidate how neutral interactions, hierarchical competition and resource partitioning between neighbours' shape tree growth and climate response in a highly diverse Amazonian forest, we combined 30 years of tree censuses with measurements of water- and carbon-related traits. We modelled individual tree growth response to climate and neighbourhood to disentangle the relative effect of neighbourhood densities, trait hierarchies and dissimilarities. While neighbourhood densities consistently decreased growth, trait dissimilarity increased it, and both had the potential to influence climate response. Greater water conservatism provided a competitive advantage to focal trees in normal years, but water-spender neighbours reduced this effect in dry years. By underlining the importance of density and trait-mediated neighbourhood interactions, our study offers a way towards improving predictions of forest dynamics.