Evidence map›Paper›PMID 41986403›Full record

ArticleNature communications2026

Chemical controls on iron distributions across the subsurface South Pacific Ocean.

M Gledhill, K Gosnell, M P Humphreys, L Delaigue, N Helle, K Zhu, P Lodeiro, C Rey-Castro, E P Achterberg

Abstract read
In one paragraph

Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

M GledhillGEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany. mgledhill@geomar.de.ORCID http://orcid.org/0000-0003-3859-2112
K GosnellGEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.ORCID http://orcid.org/0000-0002-0625-2618
M P HumphreysNIOZ Royal Netherlands Institute for Sea Research, Department of Ocean Systems, Texel, the Netherlands.ORCID http://orcid.org/0000-0002-9371-7128
L DelaigueNIOZ Royal Netherlands Institute for Sea Research, Department of Ocean Systems, Texel, the Netherlands.ORCID http://orcid.org/0000-0002-9796-1128
N HelleGEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.
K ZhuGEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.
P LodeiroDepartment of Chemistry, Physics and Environmental and Soil Sciences, University of Lleida and AGROTECNIO-CERCA Centre, Lleida, Spain.ORCID http://orcid.org/0000-0002-2557-5391
C Rey-CastroDepartment of Chemistry, Physics and Environmental and Soil Sciences, University of Lleida and AGROTECNIO-CERCA Centre, Lleida, Spain.ORCID http://orcid.org/0000-0002-9286-4206
E P AchterbergGEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.ORCID http://orcid.org/0000-0002-3061-2767

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Iron and nitrogen are the primary nutrients that limit productivity in the ocean. While nitrogen cycling is largely controlled by biology, iron cycling is strongly determined by chemistry because iron losses are driven by abiotic formation of authigenic mineral iron. Here, we apply a mechanistic approach to examine how organic matter across the dissolved-particulate size spectrum controls authigenic iron formation in subsurface waters (>250 m) of the South Pacific Ocean. We find that accounting for the chemical heterogeneity of organic matter is essential for predicting widespread authigenic iron formation. Predicted dissolved and particulate iron concentrations matched observations in the ocean interior, while discrepancies were linked to kinetic control of authigenic iron formation or inputs of particles from the seafloor. Our work shows the need to represent the complexity of abiotic interactions to better resolve the interplay of chemical and biological controls on ocean iron cycling.

Identifiers

PMID41986403
PMCPMC13087175

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.