Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2023718118 |
Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide | |
Pedro M. Tognetti; Suzanne M. Prober; Selene Báez; Enrique J. Chaneton; Jennifer Firn; Anita C. Risch; Martin Schuetz; Anna K. Simonsen; Laura Yahdjian; Elizabeth T. Borer; Eric W. Seabloom; Carlos Alberto Arnillas; Jonathan D. Bakker; Cynthia S. Brown; Marc W. Cadotte; Maria C. Caldeira; Pedro Daleo; John M. Dwyer; Philip A. Fay; Laureano A. Gherardi; Nicole Hagenah; Yann Hautier; Kimberly J. Komatsu; Rebecca L. McCulley; Jodi N. Price; Rachel J. Standish; Carly J. Stevens; Peter D. Wragg; Mahesh Sankaran | |
2021-07-13 | |
发表期刊 | Proceedings of the National Academy of Sciences |
出版年 | 2021 |
英文摘要 | Anthropogenic nutrient enrichment is driving global biodiversity decline and modifying ecosystem functions. Theory suggests that plant functional types that fix atmospheric nitrogen have a competitive advantage in nitrogen-poor soils, but lose this advantage with increasing nitrogen supply. By contrast, the addition of phosphorus, potassium, and other nutrients may benefit such species in low-nutrient environments by enhancing their nitrogen-fixing capacity. We present a global-scale experiment confirming these predictions for nitrogen-fixing legumes (Fabaceae) across 45 grasslands on six continents. Nitrogen addition reduced legume cover, richness, and biomass, particularly in nitrogen-poor soils, while cover of non–nitrogen-fixing plants increased. The addition of phosphorous, potassium, and other nutrients enhanced legume abundance, but did not mitigate the negative effects of nitrogen addition. Increasing nitrogen supply thus has the potential to decrease the diversity and abundance of grassland legumes worldwide regardless of the availability of other nutrients, with consequences for biodiversity, food webs, ecosystem resilience, and genetic improvement of protein-rich agricultural plant species. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/334031 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Pedro M. Tognetti,Suzanne M. Prober,Selene Báez,et al. Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide[J]. Proceedings of the National Academy of Sciences,2021. |
APA | Pedro M. Tognetti.,Suzanne M. Prober.,Selene Báez.,Enrique J. Chaneton.,Jennifer Firn.,...&Mahesh Sankaran.(2021).Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide.Proceedings of the National Academy of Sciences. |
MLA | Pedro M. Tognetti,et al."Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide".Proceedings of the National Academy of Sciences (2021). |
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