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  • Anderson.et.al.main.text.26Sept2017

    Rights statement: Copyright by the Ecological Society of America. Anderson, T.M., Griffith, D.M., Grace, J.B., Lind, E.M., Adler, P.B., Biederman, L.A., Blumenthal, D.M., Daleo, P., Firn, J., Hagenah, N., Harpole, W.S., MacDougall, A.S., McCulley, R.L., Prober, S.M., Risch, A.C., Sankaran, M., Schütz, M., Seabloom, E.W., Stevens, C.J., Sullivan, L.L., Wragg, P.D. and Borer, E.T. (2018), Herbivory and eutrophication mediate grassland plant nutrient responses across a global climatic gradient. Ecology, 99: 822-831. doi:10.1002/ecy.2175

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    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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Herbivory and eutrophication mediate grassland plant nutrient responses across a global climatic gradient

Research output: Contribution to journalJournal article

Published
  • T. Michael Anderson
  • Daniel M. Griffith
  • James B. Grace
  • Eric M. Lind
  • Peter B. Adler
  • Lori A. Biederman
  • Dana M. Blumenthal
  • Pedro Daleo
  • Jennifer Firn
  • Nicole Hagenah
  • W. Stanley Harpole
  • Andrew S. MacDougall
  • Rebecca L. McCulley
  • Suzanne M. Prober
  • Anita C. Risch
  • Mahesh Sankaran
  • Martin Schütz
  • Eric W. Seabloom
  • Lauren L. Sullivan
  • Peter D. Wragg
  • Elizabeth T. Borer
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<mark>Journal publication date</mark>2/04/2018
<mark>Journal</mark>Ecology
Issue number4
Volume99
Number of pages10
Pages (from-to)822-831
Publication StatusPublished
Early online date31/03/18
<mark>Original language</mark>English

Abstract

Plant stoichiometry, the relative concentration of elements, is a key regulator of ecosystem functioning and is also being altered by human activities. In this paper we sought to understand the global drivers of plant stoichiometry and compare the relative contribution of climatic vs. anthropogenic effects. We addressed this goal by measuring plant elemental (C, N, P and K) responses to eutrophication and vertebrate herbivore exclusion at eighteen sites on six continents. Across sites, climate and atmospheric N deposition emerged as strong predictors of plot-level tissue nutrients, mediated by biomass and plant chemistry. Within sites, fertilization increased total plant nutrient pools, but results were contingent on soil fertility and the proportion of grass biomass relative to other functional types. Total plant nutrient pools diverged strongly in response to herbivore exclusion when fertilized; responses were largest in ungrazed plots at low rainfall, whereas herbivore grazing dampened the plant community nutrient responses to fertilization. Our study highlights (1) the importance of climate in determining plant nutrient concentrations mediated through effects on plant biomass, (2) that eutrophication affects grassland nutrient pools via both soil and atmospheric pathways and (3) that interactions among soils, herbivores and eutrophication drive plant nutrient responses at small scales, especially at water-limited sites.

Bibliographic note

Copyright by the Ecological Society of America. Anderson, T.M., Griffith, D.M., Grace, J.B., Lind, E.M., Adler, P.B., Biederman, L.A., Blumenthal, D.M., Daleo, P., Firn, J., Hagenah, N., Harpole, W.S., MacDougall, A.S., McCulley, R.L., Prober, S.M., Risch, A.C., Sankaran, M., Schütz, M., Seabloom, E.W., Stevens, C.J., Sullivan, L.L., Wragg, P.D. and Borer, E.T. (2018), Herbivory and eutrophication mediate grassland plant nutrient responses across a global climatic gradient. Ecology, 99: 822-831. doi:10.1002/ecy.2175