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dc.contributor.authorWyatt, N
dc.contributor.authorBirchill, A
dc.contributor.authorUssher, S
dc.contributor.authorMilne, A
dc.contributor.authorBouman, H
dc.contributor.authorTroein, E
dc.contributor.authorPabortsava, K
dc.contributor.authorWright, A
dc.contributor.authorFlanagan, O
dc.contributor.authorBibby, T
dc.contributor.authorMartin, A
dc.contributor.authorMoore, CM
dc.date.accessioned2023-06-14T13:38:26Z
dc.date.available2023-06-14T13:38:26Z
dc.date.issued2023-07-03
dc.identifier.issn1091-6490
dc.identifier.issn1091-6490
dc.identifier.otherARTN e2220111120
dc.identifier.urihttps://pearl.plymouth.ac.uk/handle/10026.1/20969
dc.description.abstract

The seasonal availability of light and micronutrients strongly regulates productivity in the Southern Ocean, restricting biological utilization of macronutrients and CO2 drawdown. Mineral dust flux is a key conduit for micronutrients to the Southern Ocean and a critical mediator of multimillennial-scale atmospheric CO2 oscillations. While the role of dust-borne iron (Fe) in Southern Ocean biogeochemistry has been examined in detail, manganese (Mn) availability is also emerging as a potential driver of past, present, and future Southern Ocean biogeochemistry. Here, we present results from fifteen bioassay experiments along a north–south transect in the undersampled eastern Pacific sub-Antarctic zone. In addition to widespread Fe limitation of phytoplankton photochemical efficiency, we found further responses following the addition of Mn at our southerly stations, supporting the importance of Fe–Mn co-limitation in the Southern Ocean. Moreover, addition of different Patagonian dusts resulted in enhanced photochemical efficiency with differential responses linked to source region dust characteristics in terms of relative Fe/Mn solubility. Changes in the relative magnitude of dust deposition, combined with source region mineralogy, could hence determine whether Fe or Mn limitation control Southern Ocean productivity under future as well as past climate states.

dc.format.extente2220111120-
dc.format.mediumPrint-Electronic
dc.languageen
dc.publisherNational Academy of Sciences
dc.subjectbiogeochemistry
dc.subjectphytoplankton
dc.subjectecophysiology
dc.titlePhytoplankton responses to dust addition in the FeMn co-limited eastern Pacific sub-Antarctic differ by source region
dc.typejournal-article
dc.typeArticle
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/37399381
plymouth.issue28
plymouth.volume120
plymouth.publisher-urlhttp://dx.doi.org/10.1073/pnas.2220111120
plymouth.publication-statusPublished
plymouth.journalProceedings of the National Academy of Sciences
dc.identifier.doi10.1073/pnas.2220111120
plymouth.organisational-group|Plymouth
plymouth.organisational-group|Plymouth|Research Groups
plymouth.organisational-group|Plymouth|Faculty of Science and Engineering
plymouth.organisational-group|Plymouth|Faculty of Science and Engineering|School of Geography, Earth and Environmental Sciences
plymouth.organisational-group|Plymouth|REF 2021 Researchers by UoA
plymouth.organisational-group|Plymouth|Users by role
plymouth.organisational-group|Plymouth|Users by role|Academics
plymouth.organisational-group|Plymouth|Research Groups|BEACh
plymouth.organisational-group|Plymouth|REF 2021 Researchers by UoA|UoA07 Earth Systems and Environmental Sciences
dc.publisher.placeUnited States
dcterms.dateAccepted2023-05-31
dc.date.updated2023-06-14T13:38:25Z
dc.rights.embargodate2023-7-20
dc.identifier.eissn1091-6490
dc.rights.embargoperiodforever
rioxxterms.versionofrecord10.1073/pnas.2220111120


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