气候变化领域集成服务门户(CCPortal): Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide

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DOI	10.1073/pnas.2023718118
	Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide
	Tognetti P.M.; Prober S.M.; Báez S.; Chaneton E.J.; Firn J.; Risch A.C.; Schuetz M.; Simonsen A.K.; Yahdjian L.; Borer E.T.; Seabloom E.W.; Arnillas C.A.; Bakker J.D.; Brown C.S.; Cadotte M.W.; Caldeira M.C.; Daleo P.; Dwyer J.M.; Fay P.A.; Gherardi L.A.; Hagenah N.; Hautier Y.; Komatsu K.J.; McCulley R.L.; Price J.N.; Standish R.J.; Stevens C.J.; Wragg P.D.; Sankaran M.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:28
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 lownutrient 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-nitrogenfixing 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. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Eutrophication; Fabaceae; Legumes; N deposition; Nutrient Network
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238689
作者单位	Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura-Consejo Nacional de Investigaciones Científicas y Técnicas, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, C1417DSE, Argentina; Land and Water Commonwealth Scientific, Industrial Research Organisation, Wembley, WA 6913, Australia; Department of Biology, Escuela Politécnica Nacional del Ecuador, Quito, 17-01-2759, Ecuador; Centre for the Environment, School of Biological and Environmental Sciences, Queensland University of Technology, Brisbane, QLD 4001, Australia; Community Ecology, Swiss Federal Institute for Forest Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Research School of Biology, Australian National University, Canberra, ACT 2601, Australia; Department of Biological Sciences, Florida International University, Miami, FL 33199, United States; Department of Ecology Evolution and Behavior, University of Minnesota, St. Paul, MN 55108, United States; Department o...
推荐引用方式 GB/T 7714	Tognetti P.M.,Prober S.M.,Báez S.,et al. Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide[J],2021,118(28).
APA	Tognetti P.M..,Prober S.M..,Báez S..,Chaneton E.J..,Firn J..,...&Sankaran M..(2021).Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide.Proceedings of the National Academy of Sciences of the United States of America,118(28).
MLA	Tognetti P.M.,et al."Negative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide".Proceedings of the National Academy of Sciences of the United States of America 118.28(2021).