Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/87435
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dc.contributor.authorMartin, Patricken
dc.contributor.authorLauro, Federico M.en
dc.contributor.authorSarkar, Amiten
dc.contributor.authorPrakash, Satyaen
dc.contributor.authorVinayachandran, P. N.en
dc.contributor.authorGoodkin, Nathalie Fairbanken
dc.date.accessioned2018-02-06T07:01:18Zen
dc.date.accessioned2019-12-06T16:41:50Z-
dc.date.available2018-02-06T07:01:18Zen
dc.date.available2019-12-06T16:41:50Z-
dc.date.issued2018en
dc.identifier.citationMartin, P., Lauro, F. M., Sarkar, A., Goodkin, N., Prakash, S., & Vinayachandran, P. N. (2018). Particulate polyphosphate and alkaline phosphatase activity across a latitudinal transect in the tropical Indian Ocean. Limnology and Oceanography, 63(3), 1395-1406.en
dc.identifier.issn0024-3590en
dc.identifier.urihttps://hdl.handle.net/10356/87435-
dc.identifier.urihttp://hdl.handle.net/10220/44411en
dc.description.abstractPolyphosphate (polyP) is an essential chemical constituent of microbial cells, and is hypothesized to play important roles in the marine biogeochemistry of phosphorus. However, polyP has only rarely been measured in the oceans. Here, we present data on the distribution of polyP across a latitudinal transect in the tropical Indian Ocean. PolyP concentrations (quantified as molar equivalents of a synthetic polyP standard) and ratios of polyP to total particulate phosphorus (TPP) along the transect ranged between 3–7 nmol eq. L−1 (polyP concentration) and 0.2–0.4 nmol eq. nmol−1 (polyP : TPP ratio), which is very similar to values reported from the North Pacific Subtropical Gyre. Yet unlike in the North Pacific, soluble reactive phosphorus was depleted to low concentrations (≤ 0.03 μmol L−1), and alkaline phosphatase activity was relatively high (1–4 nmol P L−1 h−1) along our cruise track. We attribute these results to the unique seasonal changes in iron and macronutrient supply in the Indian Ocean, which are caused by the monsoonal reversal in ocean currents. PolyP concentrations and polyP : TPP ratios decreased sharply with depth down to 150 m, suggesting that polyP was preferentially recycled relative to TPP, unlike in the North Pacific Subtropical Gyre. We hypothesize that alkaline phosphatase exerts a significant control over marine polyP biogeochemistry.en
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.format.extent12 p.en
dc.language.isoenen
dc.relation.ispartofseriesLimnology and Oceanographyen
dc.rights© 2018 The Authors, published by Wiley Periodicals, Inc. on behalf of Association for the Sciences of Limnology and Oceanography. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.subjectPolyphosphateen
dc.subjectMarine Biogeochemistryen
dc.titleParticulate polyphosphate and alkaline phosphatase activity across a latitudinal transect in the tropical Indian Oceanen
dc.typeJournal Articleen
dc.contributor.schoolAsian School of the Environmenten
dc.contributor.organizationSingapore Centre for Environmental Life Sciences Engineeringen
dc.contributor.researchEarth Observatory of Singaporeen
dc.identifier.doihttp://dx.doi.org/10.1002/lno.10780en
dc.description.versionPublished versionen
item.grantfulltextopen-
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