Ecology: A few species dominate forest tree abundance pan-tropically.

An analysis of over 1 million old-growth tropical forest trees reveals that ∼2.2% of species comprise 50% of the individuals in Africa, Amazonia, and Southeast Asia, suggesting that the ecological mechanisms underpinning tree community assembly are ubiquitous across the tropics.
Competing Interests: Declaration of interests The authors declare no competing interests.
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