UDTR — Radar mondial des droits de la Nature

Data and code from: Scale dependence of woody plant β-diversity in a tropical rainforest metacommunity

Identification

Clé publique

radar:r-4a98d3bba5dd156eade9aec03f897eaf

Auteurs

Zang, Runguo · Yao, Jie

Année déclarée

2026

Langue déclarée

en

Type source

Dataset

Première détection

2026-11-13T08:57:07.153164+00:00

Dernière observation des métadonnées

2026-11-13T08:57:07.153164+00:00

Dernière vérification HTTP

Non effectuée

Institutions déclarées par la source

Chinese Academy of Forestry · Ecology and Nature Conservation Institute, Chinese Academy of Forestry

Résumé documentaire — langue originale

β-diversity is a central concept to understanding community assembly, yet how its decomposition components and underlying drivers vary with spatial extent remains insufficiently understood. We used a nested metacommunity framework to examine the scale dependence of total β-diversity and its species replacement and richness difference components, and to identify how environmental and spatial predictors contribute across scales. We analyzed woody plant diversity in 250 plots arranged on a contiguous 1×1km grid in a tropical rainforest on Hainan, China. By aggregating nearest-neighbor plots into metacommunities, we constructed a continuous gradient of spatial extent and quantified total β-diversity (BDtotal), species replacement (Repl), and richness difference (RichDif) for each metacommunity realization. β-diversity increased modestly with spatial extent, but its internal structure was remarkably stable: species replacement consistently dominated total β-diversity, whereas richness differences contributed less and changed little across scales. Environmental heterogeneity was positively associated with β-diversity, primarily through replacement rather than richness differences. The variation explained by both environmental predictors and spatial structure increased with extent before approaching a plateau. Spatial structure explained the largest share of variation in BDtotal, Repl, and RichDif, while the relative importance of environmental predictors shifted with scale: soil variables were more influential at finer extents, whereas bioclimatic variables gained importance at broader extents. Environmental predictors were more strongly associated with species replacement than with richness differences, whereas spatial structure explained both components to a similar degree. Overall, increasing spatial extent amplified the magnitude of β-diversity more than it altered the balance between its components, revealing species replacement as a scale-robust feature of tropical forest metacommunities. These findings show that tropical forest β-diversity emerges from the joint effects of environmental heterogeneity and spatial structure, and they highlight the need to conserve spatially dispersed, compositionally complementary habitat mosaics rather than focusing solely on local richness hotspots.

Identifiants

DOI

10.5061/dryad.1c59zw4bz

Repères documentaires

Famille documentaire

dataset

Types déclarés par les sources

Dataset

Éditeurs

Dryad

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Sources

DataCite · Document 1

• Document · https://datadryad.org/dataset/doi:10.5061/dryad.1c59zw4bz

Statut documentaire

Pertinence à examiner

Bibliothèque

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