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dc.contributor.authorRajaneesh, K.M.
dc.contributor.authorMitbavkar, S.
dc.contributor.authorAnil, A.C.
dc.date.accessioned2019/03/31
dc.date.accessioned2019-04-30T12:44:21Z
dc.date.available2018/07/31
dc.date.available2019-04-30T12:44:21Z
dc.date.issued2018
dc.identifier.citationEstuarine, Coastal and Shelf Science, vol.207; 2018; 325-337
dc.identifier.issn0272-7714
dc.identifier.urihttps://doi.org/10.1016/J.ECSS.2018.04.026
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/8035
dc.description.abstractPhytoplankton size-fractionated biomass is an important determinant of the type of food web functioning in aquatic ecosystems. Knowledge about the effect of seasonal salinity gradient on the size-fractionated biomass dynamics is still lacking, especially in tropical estuaries experiencing monsoon. The phytoplankton size-fractionated chlorophyll a biomass (>3--m and <3--m) and picophytoplankton community structure were characterized in the monsoonal Zuari estuary, along the west coast of India, from October 2010 to September 2011 across the salinity gradient (0-35). On an annual scale, >3--m size-fraction was the major contributor to the total phytoplankton chlorophyll a biomass with the ephemeral dominance of <3--m size-fraction. During monsoon season, freshwater runoff and shorter water residence time resulted in a size-independent response. The lowest annual chlorophyll a biomass concentration of both size-fractions showed signs of recovery with increasing salinity downstream towards the end of the monsoon season. In contrast, the chlorophyll a biomass response was size-dependent during the non-monsoon seasons with the sporadic dominance (>50%) of <3--m chlorophyll a biomass during high water temperature episodes from downstream to middle estuary during pre-monsoon and at low salinity and high nutrient conditions upstream during post-monsoon. These conditions also influenced the picophytoplankton community structure with picoeukaryotes dominating during the pre-monsoon, phycoerythrin containing Synechococcus during the monsoon and phycocyanin containing Synechococcus during the post-monsoon. This study highlights switching over of dominance in size-fractionated phytoplankton chlorophyll a biomass at intra, inter-seasonal and spatial scales which will likely govern the estuarine trophodynamics.
dc.languageen
dc.publisherElsevier
dc.relation.isreferencedbySCI
dc.titleDynamics of size-fractionated phytoplankton biomass in a monsoonal estuary: Patterns and drivers for seasonal and spatial variability
dc.typeJournal Article�
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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