Plant diversity increases with the strength of negative density dependence at the global scale

Science
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Abstract

Theory predicts that higher biodiversity in the tropics is maintained by specialized interactions among plants and their natural enemies that result in conspecific negative density dependence (CNDD). By using more than 3000 species and nearly 2.4 million trees across 24 forest plots worldwide, we show that global patterns in tree species diversity reflect not only stronger CNDD at tropical versus temperate latitudes but also a latitudinal shift in the relationship between CNDD and species abundance. CNDD was stronger for rare species at tropical versus temperate latitudes, potentially causing the persistence of greater numbers of rare species in the tropics. Our study reveals fundamental differences in the nature of local-scale biotic interactions that contribute to the maintenance of species diversity across temperate and tropical communities.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Plant diversity increases with the strength of negative density dependence at the global scale
Series title Science
DOI 10.1126/science.aam5678
Volume 356
Issue 6345
Year Published 2017
Language English
Publisher American Association for the Advancement of Science
Contributing office(s) National Research Program - Eastern Branch
Description 4 p.
First page 1389
Last page 1392
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