SciCombinator

Discover the most talked about and latest scientific content & concepts.

AM Osuri, J Ratnam, V Varma, P Alvarez-Loayza, J Hurtado Astaiza, M Bradford, C Fletcher, M Ndoundou-Hockemba, PA Jansen, D Kenfack, AR Marshall, BR Ramesh, F Rovero and M Sankaran
Abstract
Defaunation is causing declines of large-seeded animal-dispersed trees in tropical forests worldwide, but whether and how these declines will affect carbon storage across this biome is unclear. Here we show, using a pan-tropical data set, that simulated declines of large-seeded animal-dispersed trees have contrasting effects on aboveground carbon stocks across Earth’s tropical forests. In our simulations, African, American and South Asian forests, which have high proportions of animal-dispersed species, consistently show carbon losses (2-12%), but Southeast Asian and Australian forests, where there are more abiotically dispersed species, show little to no carbon losses or marginal gains (±1%). These patterns result primarily from changes in wood volume, and are underlain by consistent relationships in our empirical data (∼2,100 species), wherein, large-seeded animal-dispersed species are larger as adults than small-seeded animal-dispersed species, but are smaller than abiotically dispersed species. Thus, floristic differences and distinct dispersal mode-seed size-adult size combinations can drive contrasting regional responses to defaunation.
Tweets*
81
Facebook likes*
4
Reddit*
1
News coverage*
23
Blogs*
9
SC clicks
0
Concepts
Tropics, Tropical rainforest, Tropical and subtropical moist broadleaf forests, Plant, Asia, Rainforest, Southeast Asia, Biodiversity
MeSH headings
-
comments powered by Disqus

* Data courtesy of Altmetric.com