Skip to Main Content
Altered climate leads to positive density-dependent feedbacks in a tropical wet forestAuthor(s): Benedicte Bachelot; Aura M. Alonso-Rodríguez; Laura Aldrich-Wolfe; Molly A. Cavaleri; Sasha C. Reed; Tana E. Wood
Source: Global Change Biology
Publication Series: Scientific Journal (JRNL)
Station: International Institute of Tropical Forestry
Download Publication (1.0 MB)
DescriptionAbstract Climate change is predicted to result in warmer and drier Neotropical forests relative to current conditions. Negative density-dependent feedbacks, mediated by natural enemies, are key to maintaining the high diversity of tree species found in the tropics, yet we have little understanding of how projected changes in climate are likely to affect these critical controls. Over three years, we evaluated the effects of a natural drought and in situ experimental warming on density-dependent feedbacks on seedling demography in a wet tropical forest in Puerto Rico. In the +4oC warming treatment, we found that seedling survival increased with increasing density of the same species (conspecific). These positive density-dependent feedbacks were not associated with a decrease in aboveground natural enemy pressure. If positive density-dependent feedbacks are not transient, the diversity of tropical wet forests, which may rely on negative density dependence to drive diversity, could decline in a future warmer, drier world.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationBachelot, Benedicte; Alonso-Rodríguez, Aura M.; Aldrich-Wolfe, Laura; Cavaleri, Molly A.; Reed, Sasha C.; Wood, Tana E. 2020. Altered climate leads to positive density-dependent feedbacks in a tropical wet forest. Global Change Biology. https://doi.org/10.1111/gcb.15087
KeywordsTropical wet forest, Negative density dependence, Positive density dependence, Climate change, Arbuscular mycorrhizal fungi.
- Density-dependent seedling mortality varies with light availability and species abundance in wet and dry Hawaiian forests
- Photosynthetic and Respiratory Acclimation of Understory Shrubs in Response to in situ Experimental Warming of a Wet Tropical Forest
- Plant diversity increases with the strength of negative density dependence at the global scale
XML: View XML