Tree and mycorrhizal fungal diversity drive intraspecific and intraindividual trait variation in temperate forests: Evidence from a tree diversity experiment

作者：Pablo Castro Sánchez‐Bermejo, Tilo Monjau, Kezia Goldmann, Olga Ferlian, Nico Eisenhauer, Helge Bruelheide, Zeqing Ma, Sylvia Haider · 发表于：Functional Ecology · 年份：2024 · DOI：10.1111/1365-2435.14549 · 被引用次数：16 · 研究领域：Ecology and Vegetation Dynamics Studies、Forest Ecology and Biodiversity Studies、Mycorrhizal Fungi and Plant Interactions

Abstract The study of tree species coexistence is crucial to understand the assembly of forest communities. In this context, trees adjust their traits in response to the interactions with other trees and, specifically, as a result of the competition for resources. Further, mycorrhizal fungal diversity and associations are important drivers of ecosystem functioning in forests, but their role as drivers of intraspecific trait variation has been disregarded. Here, we studied intraspecific trait variation of trees in response to tree and mycorrhizal fungal diversity. We sampled 3200 leaves from 640 trees belonging to 10 native, deciduous species in a tree diversity experiment in Central Germany. This experiment relies on the combination of gradients of tree richness and mycorrhizal associations. To handle large amounts of leaf samples, we acquired leaf‐level spectral data and used deep learning to predict values for five leaf traits from the leaf economics spectrum (LES): specific leaf area, leaf dry matter content, carbon to nitrogen ratio, carbon content and phosphorus content. For every tree, we calculated the mean value for every trait and two multi‐trait functional indices (functional richness and functional dispersion) based on values for individual leaves. Finally, we used sequencing‐based data to assess the richness of mycorrhizal fungi associated with the trees. We found that tree and mycorrhizal fungi richness had an effect on different leaf functional traits. Specifica...