dc.contributor.author | Bemal, S. | |
dc.contributor.author | Anil, A.C. | |
dc.contributor.author | Amol, P. | |
dc.date.accessioned | 2019-12-31 | |
dc.date.accessioned | 2020-02-04T09:38:25Z | |
dc.date.available | 2019-11-01 | |
dc.date.available | 2020-02-04T09:38:25Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Journal of Marine Systems, vol.199; 2019; Article no: 103221 | |
dc.identifier.uri | https://doi.org/10.1016/j.jmarsys.2019.103221 | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/8273 | |
dc.description.abstract | The westward propagating Rossby waves and associated currents transport low salinity nutrient-rich
water mass from the Bay of Bengal into the southeastern Arabian Sea (SEAS) during winter
monsoon, and ensuing changes in physicochemical properties of water column regulate
phytoplankton distribution in the latter region. Herein, we elucidate the influence of Rossby wave
propagation on picophytoplankton community composition in the SEAS. We compare the
picophytoplankton community structure between the Rossby front (low saline, high nitrate
concentration and strong current) and the surrounding non-frontal regions (high saline, low nitrate
and weak current) along a cruise track in the SEAS during early winter monsoon (November, 2016).
The higher abundance of phycoerythrin-rich Synechococcus (‘dim’ and ‘bright’ types) and lower
abundance of Prochlorococcus in the frontal region than the non-frontal regions suggest that salinity
and nitrate concentration in the water column significantly influence the picophytoplankton
community dynamics. We argue that the advection of low saline water mass from the Bay of Bengal
associated with Rossby wave propagation introduces a ‘dim’ phycoerythrin-rich Synechococcus
group in the frontal region, and the ensuing physicochemical changes in water column favor their
growth, whereas low cell abundance of Prochlorococcus and Phycocyanin-rich Synechococcus
suggests restricted growth of both the groups. These inferences indicate that Rossby wave associated
circulation pattern and physicochemical changes in the water column regulate picophytoplankton
community composition and its contribution to food web dynamics in the SEAS. | |
dc.language | en | |
dc.relation.isreferencedby | SCI | |
dc.rights | Only the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations | |
dc.title | Picophytoplankton variability: Influence of Rossby wave propagation in the southeastern Arabian Sea | |
dc.type | Journal Article | |
dc.affiliation.author | CSIR-National Institute of Oceanography, Dona Paula, Goa, India | |