ArticleEnvironmental science & technology2026
The Global Ocean Selenium Cycle Shaped by Phytoplankton Uptake and Community Structure.
Article in Environmental science & technology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Selenium (Se) is an essential micronutrient for humans, with seafood as a major dietary source, yet its cycling in the ocean remains poorly understood. Here, we present the first global 3-D ocean Se model, constrained by field observations and laboratory experiments, to identify the processes that control marine Se speciation and distribution. Biological uptake by phytoplankton emerges as the dominant driver of horizontal gradients and vertical nutrient-like profiles of inorganic Se (selenite, Se(IV) + selenate, Se(VI)). Surprisingly, oligotrophic regions dominated by cyanobacteria (
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