Megaherbivores modify forest structure and increase carbon stocks through multiple pathways. - Université de Bourgogne Accéder directement au contenu
Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2023

Megaherbivores modify forest structure and increase carbon stocks through multiple pathways.

Résumé

Megaherbivores have pervasive ecological effects. In African rainforests, elephants can increase aboveground carbon, though the mechanisms are unclear. Here, we combine a large unpublished dataset of forest elephant feeding with published browsing preferences totaling nearly 200,000 records covering >800 plant species and with nutritional data for 145 species. Elephants increase carbon stocks by: 1) promoting high wood density trees via preferential browsing on leaves from low wood density species, which are more palatable and digestible; and 2) dispersing seeds of trees that are relatively large and have the highest average wood density among tree guilds based on dispersal mode. Loss of forest elephants could cause an increase in abundance of fast-growing low wood density trees and a 6% to 9% decline in aboveground carbon stocks due to regeneration failure of elephant-dispersed trees. These results demonstrate the importance of megaherbivores for maintaining diverse, high-carbon tropical forests. Successful elephant conservation will contribute to climate mitigation at a globally-relevant scale.

Dates et versions

hal-03959769 , version 1 (27-01-2023)

Identifiants

Citer

Fabio Berzaghi, François Bretagnolle, Clémentine Durand-Bessart, Stephen Blake. Megaherbivores modify forest structure and increase carbon stocks through multiple pathways.. Proceedings of the National Academy of Sciences of the United States of America, 2023, 120 (5), pp.e2201832120. ⟨10.1073/pnas.2201832120⟩. ⟨hal-03959769⟩
30 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More