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Related Experiment Video

Updated: May 6, 2026

Investigation of Plant Interactions Across Common Mycorrhizal Networks Using Rotated Cores

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Published on: March 26, 2019

Hyperdominance in the Amazonian tree flora.

Hans ter Steege¹, Nigel C A Pitman, Daniel Sabatier

¹Naturalis Biodiversity Center, Leiden, Netherlands.

Science (New York, N.Y.)

|October 19, 2013

Summary

This summary is machine-generated.

A small group of tree species dominates the Amazon rainforest, with just 227 species accounting for half of all trees in Amazonia. This finding highlights the surprising commonness of rare species in the world's most diverse tree community.

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Area of Science:

Ecology
Botany
Biodiversity Science

Background:

Amazon Basin tree community studies traditionally limited by scale.
Vastness of Amazonia necessitates basin-wide ecological assessments.

Purpose of the Study:

To empirically assess tree commonness, rarity, and richness across Amazonia.
To extrapolate species diversity and distribution patterns for Amazonian trees.

Main Methods:

Data collection from 1170 tree plots across major forest types in Amazonia.
Statistical extrapolation to estimate total species numbers and dominance patterns.

Main Results:

Amazonia estimated to host approximately 16,000 tree species.
A mere 227 species (1.4%) constitute 50% of all individual trees.
Dominant species are often habitat specialists with localized dominance.

Conclusions:

A small subset of species disproportionately dominates the Amazonian tree flora.
Findings contrast with the diversity of other major floras, like North America's.
Implications for conservation and understanding hyperdiversity in tropical forests.