硒
环境科学
气候变化
硒缺乏症
人类健康
微量元素
环境化学
环境卫生
生态学
生物
化学
医学
有机化学
酶
谷胱甘肽
生物化学
谷胱甘肽过氧化物酶
作者
Gerrad D. Jones,Boris Droz,Peter Greve,Pia Gottschalk,Deyan Poffet,Steve P. McGrath,Sonia I. Seneviratne,Pete Smith,Lenny Winkel
标识
DOI:10.1073/pnas.1611576114
摘要
Significance The trace element selenium is essential for human health and is required in a narrow dietary concentration range. Insufficient selenium intake has been estimated to affect up to 1 billion people worldwide. Dietary selenium availability is controlled by soil–plant interactions, but the mechanisms governing its broad-scale soil distributions are largely unknown. Using data-mining techniques, we modeled recent (1980–1999) distributions and identified climate–soil interactions as main controlling factors. Furthermore, using moderate climate change projections, we predicted future (2080–2099) soil selenium losses from 58% of modeled areas (mean loss = 8.4%). Predicted losses from croplands were even higher, with 66% of croplands predicted to lose 8.7% selenium. These losses could increase the worldwide prevalence of selenium deficiency.
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