Selenium deficiency risk predicted to increase under future climate change

Gerrad D. Jones, Boris Droz, Peter Greve, Pia Gottschalk, Deyan Poffet, Steve P. McGrath, Sonia I. Seneviratne, Pete Smith, Lenny H.E. Winkel

Research output: Contribution to journalArticle

71 Citations (Scopus)
8 Downloads (Pure)

Abstract

Deficiencies of micronutrients, including essential trace elements, affect up to 3 billion people worldwide. The dietary availability of trace elements is determined largely by their soil concentrations. Until now, the mechanisms governing soil concentrations have been evaluated in small-scale studies, which identify soil physicochemical properties as governing variables. However, global concentrations of trace elements and the factors controlling their distributions are virtually unknown. We used 33,241 soil data points to model recent (1980–1999) global distributions of Selenium (Se), an essential trace element that is required for humans. Worldwide, up to one in seven people have been estimated to have low dietary Se intake. Contrary to small-scale studies, soil Se concentrations were dominated by climate–soil interactions. Using moderate climate-change scenarios for 2080–2099, we predicted that changes in climate and soil organic carbon content will lead to overall decreased soil Se concentrations, particularly in agricultural areas; these decreases could increase the prevalence of Se deficiency. The importance of climate–soil interactions to Se distributions suggests that other trace elements with similar retention mechanisms will be similarly affected by climate change.
Original languageEnglish
Pages (from-to)2848-2853
Number of pages6
JournalPNAS
Volume114
Issue number11
Early online date21 Feb 2017
DOIs
Publication statusPublished - 14 Mar 2017

Keywords

  • selenium
  • soils
  • global distribution
  • prediction
  • climate change

Fingerprint Dive into the research topics of 'Selenium deficiency risk predicted to increase under future climate change'. Together they form a unique fingerprint.

  • Datasets

    Ionomics HUB

    Salt, D. (Creator), University of Aberdeen, 1 Jan 2007

    Dataset

    Cite this

    Jones, G. D., Droz, B., Greve, P., Gottschalk, P., Poffet, D., McGrath, S. P., Seneviratne, S. I., Smith, P., & Winkel, L. H. E. (2017). Selenium deficiency risk predicted to increase under future climate change. PNAS, 114(11), 2848-2853. https://doi.org/10.1073/pnas.1611576114