Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

A latitudinal gradient in tree community assembly processes evidenced in forests of China

Abstract : Aim :Most studies on latitudinal gradients of biodiversity have focused on gradients of species richness. Here we aim to test whether, on top of these strong diversity gradients, processes of community assembly vary along a latitudinal gradient of more than 33°. Location :China, latitude 18.67–51.86°N. Methods : We used species abundance distribution (SAD) data collected in 32 forest tree plots, and fitted a non-neutral model of community assembly to these SADs. We then calculated the fitted deviation from neutrality, delta, and looked for correlations between delta and geographical and environmental data. Results : The fitted parameter delta was positive in most plots, and was furthermore positively correlated with latitude and negatively with temperature, indicating a less even abundance distribution and a likely increase in the strength of environmental filtering in regions further from the tropics and with decreasing temperatures. These results imply that on top of reducing the species richness, cold temperature may impact community assembly processes by strengthening local environmental filtering. Main conclusions : Our results suggest a latitudinal gradient in tree community assembly process in Chinese forests, in which deviations from neutrality increase with latitude, probably because of an increase in environmental harshness.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal.inrae.fr/hal-02601371
Déposant : Migration Irstea Publications <>
Soumis le : samedi 16 mai 2020 - 06:35:50
Dernière modification le : lundi 18 mai 2020 - 14:44:08

Identifiants

Collections

Citation

X. Qiao, Franck Jabot, Z. Tang, Ming Jiang, J. Fang. A latitudinal gradient in tree community assembly processes evidenced in forests of China. Global Ecology and Biogeography, Wiley, 2015, 24 (3), pp.314-323. ⟨10.1111/geb.12778⟩. ⟨hal-02601371⟩

Partager

Métriques

Consultations de la notice

12