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Biological Samples Preparation for Speciation at Cryogenic Temperature using High-Resolution X-Ray Absorption Spectroscopy

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Published on: May 27, 2022

Selenium deficiency risk predicted to increase under future climate change.

Gerrad D Jones¹, Boris Droz¹, Peter Greve²

¹Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Duebendorf, Switzerland.

Proceedings of the National Academy of Sciences of the United States of America

|February 23, 2017

Summary

Global soil Selenium (Se) concentrations are primarily driven by climate-soil interactions, not just soil properties. Climate change may decrease soil Se, increasing deficiency risks worldwide.

Keywords:

climate change global distribution prediction selenium soils

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Area of Science:

Environmental Science
Geochemistry
Nutritional Science

Background:

Micronutrient deficiencies, including trace elements, impact billions globally.
Dietary trace element availability is linked to soil concentrations, but global distribution factors remain unclear.
Small-scale studies suggest soil physicochemical properties govern trace element concentrations.

Purpose of the Study:

To model recent global distributions of Selenium (Se), an essential trace element.
To identify key factors controlling global soil Se concentrations.
To predict the impact of climate change on soil Se and potential deficiency prevalence.

Main Methods:

Utilized 33,241 soil data points for global Se distribution modeling (1980-1999).
Analyzed climate-soil interactions as primary drivers of soil Se concentrations.
Applied moderate climate-change scenarios (2080-2099) to predict future soil Se levels.

Main Results:

Soil Se concentrations are predominantly influenced by climate-soil interactions, contrary to previous small-scale findings.
Projected climate change and altered soil organic carbon content will likely decrease soil Se concentrations globally.
Agricultural areas are predicted to experience significant reductions in soil Se, potentially exacerbating Se deficiency.

Conclusions:

Climate-soil interactions are critical determinants of global Selenium distribution.
Future climate change poses a risk of increased Selenium deficiency due to declining soil Se levels.
Trace elements with similar soil retention mechanisms may be similarly affected by climate change.