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For more than 30 years, the relationship between net primary productivity and species richness has generated intense debate in ecology about the processes regulating local diversity. The original view, which is still widely accepted, holds that the relationship is hump-shaped, with richness first rising and then declining with increasing productivity. Although recent meta-analyses questioned the generality of hump-shaped patterns, these syntheses have been criticized for failing to account for methodological differences among studies. We addressed such concerns by conducting standardized sampling in 48 herbaceous-dominated plant communities on five continents. We found no clear relationship between productivity and fine-scale (meters(-2)) richness within sites, within regions, or across the globe. Ecologists should focus on fresh, mechanistic approaches to understanding the multivariate links between productivity and richness.

Original publication

DOI

10.1126/science.1204498

Type

Journal article

Journal

Science

Publication Date

23/09/2011

Volume

333

Pages

1750 - 1753

Keywords

Africa, Australia, Biodiversity, Biomass, China, Ecosystem, Europe, Models, Biological, Models, Statistical, North America, Plant Development, Plant Physiological Phenomena, Plants, Regression Analysis