TY - JOUR

T1 - Intraspecific and intraindividual trait variability decrease with tree richness in a subtropical tree biodiversity experiment

AU - Castro Sánchez-Bermejo, Pablo

AU - Carmona, Carlos P.

AU - Schuman, Meredith Christine

AU - Benavides, Raquel

AU - Sachsenmaier, Lena

AU - Li, Shan

AU - Liu, Xiaojuan

AU - Haider, Sylvia

N1 - Publisher Copyright: © The Author(s) 2025.

PY - 2025/12

Y1 - 2025/12

N2 - Phenotypic variability within tree species responds to local tree species richness. However, we lack evidence on how different sources of trait variation shape tree-tree interactions. Along a diversity gradient from one to eight tree species, here we collect 4568 leaves from 381 trees to study changes in intraspecific and intraindividual leaf trait variability, and assess their contribution to community functional diversity. Intraspecific trait variability in functional traits decreases with tree species richness, while similar responses for intraindividual variability are revealed by spectral traits. Functional overlap between conspecific trees increases through intraindividual variation, but is reduced through intraspecific variability, meaning that intraspecific variability may reduce intraspecific competitive interactions while intraindividual variability could arise due to varying light within the canopy. Last, intraspecific and intraindividual variability explain high community functional richness and divergence, respectively, especially in mixtures. Our findings emphasize that fine-scale variability influences tree-tree interactions and drive local functional diversity.

AB - Phenotypic variability within tree species responds to local tree species richness. However, we lack evidence on how different sources of trait variation shape tree-tree interactions. Along a diversity gradient from one to eight tree species, here we collect 4568 leaves from 381 trees to study changes in intraspecific and intraindividual leaf trait variability, and assess their contribution to community functional diversity. Intraspecific trait variability in functional traits decreases with tree species richness, while similar responses for intraindividual variability are revealed by spectral traits. Functional overlap between conspecific trees increases through intraindividual variation, but is reduced through intraspecific variability, meaning that intraspecific variability may reduce intraspecific competitive interactions while intraindividual variability could arise due to varying light within the canopy. Last, intraspecific and intraindividual variability explain high community functional richness and divergence, respectively, especially in mixtures. Our findings emphasize that fine-scale variability influences tree-tree interactions and drive local functional diversity.

KW - Ecosystems Research

KW - Biology

UR - http://www.scopus.com/inward/record.url?scp=105024746349&partnerID=8YFLogxK

U2 - 10.1038/s41467-025-67265-8

DO - 10.1038/s41467-025-67265-8

M3 - Journal articles

C2 - 41381495

AN - SCOPUS:105024746349

VL - 16

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 11009

ER -