Productivity and global climate revisited: The sensitivity of tropical forest growth to precipitation

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246 Scopus citations

Abstract

The response of tropical forest carbon balance to global change is highly dependent on the factors limiting net primary productivity (NPP) in this biome. Current empirical global NPP-climate relationships predict that the response of NPP to climate diminishes at higher levels of mean annual precipitation (MAP) and mean annual temperature (MAT), but data have been relatively scarce in warm and wet tropical ecosystems. By integrating data from a new comprehensive global survey of NPP from tropical forests and a climate gradient from Maui, Hawaii, along with data previously used to develop NPP-climate relationships, I show that there is a strong negative relationship between MAP and NPP in humid ecosystems. The relationships derived here clearly demonstrate that NPP in wet tropical forests is sensitive to climate, and that future forest growth may be limited by increased precipitation forecast by global climate models for the wet tropics.

Original languageEnglish (US)
Pages (from-to)1165-1170
Number of pages6
JournalEcology
Volume84
Issue number5
DOIs
StatePublished - May 2003
Externally publishedYes

Keywords

  • Carbon
  • Global climate
  • Mean annual precipitation
  • Mean annual temperature
  • Net primary productivity
  • Tropical forest
  • Tropics

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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