Productivity is a poor predictor of plant species richness.
نویسندگان
چکیده
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.
منابع مشابه
Comment on "Productivity is a poor predictor of plant species richness".
Adler et al. (Reports, 23 September 2011, p. 1750) analyzed the standardized sampling data from 48 herbaceous-dominated plant communities and concluded that "Productivity is a poor predictor of plant species richness" at fine-scale. However, their method was biased toward site-number-dominated plant communities. They also failed to provide enough data for regional analysis and detailed informat...
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Pan et al. claim that the results by Adler et al. actually show a strong linear positive relationship between productivity and richness, while Fridley et al. contend that the data show a strong humped relationship. These responses illustrate how the preoccupation with bivariate patterns distracts from a deeper understanding of the multivariate mechanisms that control these important ecosystem p...
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ورودعنوان ژورنال:
- Science
دوره 333 6050 شماره
صفحات -
تاریخ انتشار 2011