Soil properties as key predictors of global grassland production: Have we overlooked micronutrients? - Archive ouverte HAL Access content directly
Journal Articles Ecology Letters Year : 2021

Soil properties as key predictors of global grassland production: Have we overlooked micronutrients?

Dajana Radujković
Erik Verbruggen
Eric Seabloom
Michael Bahn
Lori Biederman
Elizabeth Borer
Elizabeth Boughton
Jane Catford
Matteo Campioli
  • Function : Author
Ian Donohue
Anne Ebeling
Anu Eskelinen
Philip Fay
Johannes Knops
Andrew Macdougall
  • Function : Author
Timothy Ohlert
Harry Olde Venterink
Anita Risch
Christiane Roscher
  • Function : Author
Martin Schütz
  • Function : Author
Maria Lucia Silveira
Carly Stevens
Kevin van Sundert
Risto Virtanen
Glenda Wardle
Peter Wragg
  • Function : Author
Sara Vicca

Abstract

Fertilisation experiments have demonstrated that nutrient availability is a key determinant of biomass production and carbon sequestration in grasslands. However, the influence of nutrients in explaining spatial variation in grassland biomass production has rarely been assessed. Using a global dataset comprising 72 sites on six continents, we investigated which of 16 soil factors that shape nutrient availability associate most strongly with variation in grassland aboveground biomass. Climate and N deposition were also considered. Based on theory-driven structural equation modelling, we found that soil micronutrients (particularly Zn and Fe) were important predictors of biomass and, together with soil physicochemical properties and C:N, they explained more unique variation (32%) than climate and N deposition (24%). However, the association between micronutrients and biomass was absent in grasslands limited by NP. These results highlight soil properties as key predictors of global grassland biomass production and point to serial co-limitation by NP and micronutrients.
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Dates and versions

hal-03410070 , version 1 (08-12-2023)

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Dajana Radujković, Erik Verbruggen, Eric Seabloom, Michael Bahn, Lori Biederman, et al.. Soil properties as key predictors of global grassland production: Have we overlooked micronutrients?. Ecology Letters, 2021, 24 (12), pp.2713-2725. ⟨10.1111/ele.13894⟩. ⟨hal-03410070⟩
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