Beta-diversity in tropical forest trees.

Published

Journal Article

The high alpha-diversity of tropical forests has been amply documented, but beta-diversity-how species composition changes with distance-has seldom been studied. We present quantitative estimates of beta-diversity for tropical trees by comparing species composition of plots in lowland terra firme forest in Panama, Ecuador, and Peru. We compare observations with predictions derived from a neutral model in which habitat is uniform and only dispersal and speciation influence species turnover. We find that beta-diversity is higher in Panama than in western Amazonia and that patterns in both areas are inconsistent with the neutral model. In Panama, habitat variation appears to increase species turnover relative to Amazonia, where unexpectedly low turnover over great distances suggests that population densities of some species are bounded by as yet unidentified processes. At intermediate scales in both regions, observations can be matched by theory, suggesting that dispersal limitation, with speciation, influences species turnover.

Full Text

Duke Authors

Cited Authors

  • Condit, R; Pitman, N; Leigh, EG; Chave, J; Terborgh, J; Foster, RB; Núñez, P; Aguilar, S; Valencia, R; Villa, G; Muller-Landau, HC; Losos, E; Hubbell, SP

Published Date

  • January 2002

Published In

Volume / Issue

  • 295 / 5555

Start / End Page

  • 666 - 669

PubMed ID

  • 11809969

Pubmed Central ID

  • 11809969

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.1066854

Language

  • eng