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dc.contributor.authorShetye, S.S.
dc.contributor.authorRahul, M.
dc.contributor.authorPatil, Shramik
dc.contributor.authorAvinash, Kumar
dc.date.accessioned2022-04-01
dc.date.accessioned2022-06-20T10:40:49Z
dc.date.available2021-12-01
dc.date.available2022-06-20T10:40:49Z
dc.date.issued2021
dc.identifier.citationPolar Science, vol.30; 2021; Article no: 100748
dc.identifier.issn1873-9652
dc.identifier.otherhttps://www.sciencedirect.com/science/article/abs/pii/S1873965221001353
dc.identifier.urihttps://doi.org/10.1016/J.POLAR.2021.100748
dc.identifier.urihttps://drs.nio.org/drs/handle/2264/8789
dc.description1.927
dc.description.abstractThe distribution of diatom taxa was studied in the Enderby Basin, East Antarctica during the austral summer of 2010. In this study, the influence of freshwater at east of the 55�E was observed due to the melting of sea-ice, resulting in stratified (shallow Mixed Layer Depth (MLD)) and low saline conditions. This decrease in sea-surface salinity was associated with an increase in pCO2 and decrease in total diatom abundance. Corethron criophilum was recognized as the most abundant diatom (absolute abundance up to 30 � 104 cells L-1; 35% contribution to total diatom taxa) and its elevated abundances recorded at west of the 55�E. Reduced C. criophilum and increased abundances of Fragilariopsis curta and Thalassiothrix antarctica were documented at east of the 55oE. This study shows that despite shallow MLD and macronutrient availability, the diatom abundance at east of 55oE was low. We suspect that, the factors such as micronutrient unavailability, freshening of the upper water column, transportation by water masses, and photoinhibition possibly affect the production of diatoms at east of the 55oE. The elevated abundance of diatoms to the west of the 55�E resulted in low pCO2 levels and high meso-zooplankton abundance. This study suggests the need of long term monitoring of phytoplankton community structure and factors influencing their production in the East Antarctic region. This is essential to better understand the projected effects of physico-chemical conditions (especially pCO2 and temperature) on Southern Ocean phytoplankton and thus biological carbon pump.
dc.languageen
dc.publisherElsevier
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleDiatom distribution in the Enderby Basin, East Antarctica
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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