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Resultant coherent large-scale patterns in diagnosed deficiency can be linked to the interacting physical\u2013chemical\u2013biological processes which drive upper ocean nutrient biogeochemistry. Calculations of ranked deficiencies across multiple elements further highlight important remaining uncertainties in the stoichiometric plasticity of nutrient ratios within oceanic microbial systems and caveats with regards to linkages to upper ocean nutrient limitation.<\/jats:p>\n                  <jats:p>This article is part of the themed issue \u2018Biological and climatic impacts of ocean trace element chemistry\u2019.<\/jats:p>","DOI":"10.1098\/rsta.2015.0290","type":"journal-article","created":{"date-parts":[[2016,10,18]],"date-time":"2016-10-18T08:04:41Z","timestamp":1476777881000},"page":"20150290","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":39,"title":["Diagnosing oceanic nutrient deficiency"],"prefix":"10.1098","volume":"374","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9541-6046","authenticated-orcid":false,"given":"C. 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