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dc.contributor.authorKarnan, C.
dc.contributor.authorJyothibabu, R.
dc.contributor.authorArunpandi, N.
dc.contributor.authorAlbin, K.J.
dc.contributor.authorParthasarathi, S.
dc.date.accessioned2021-01-31
dc.date.accessioned2021-02-09T10:13:08Z
dc.date.available2021-01-01
dc.date.available2021-02-09T10:13:08Z
dc.date.issued2021
dc.identifier.citationEstuarine, Coastal and Shelf Science, vol.250; 2021; Article no:� 107149
dc.identifier.issn0272-7714
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S0272771420308805
dc.identifier.urihttps://doi.org/10.1016/j.ecss.2020.107149
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/8354
dc.descriptionIF2019 - 2.333
dc.description.abstractThis study presents how seasonal hydrographical changes affect the size structure of the micro-plankton community and thereby the availability of micro-detritus in the Kochi backwaters (KBW). Advanced quantification of plankton and detritus has been conducted using a FlowCAM, and we tested here the hypothesis that floodwater considerably increases the detritus availability in the KBW. Fortnightly time-series sampling was carried out over a year (2013-14) in a downstream location of the KBW. The water column in the study region was moderately rich in nutrients throughout the year (NO3: >1.4 mu M; PO4: >0.3 mu M; SiO4: >3 mu M), showing the maximum levels during the Southwest Monsoon (SWM; June to September) followed by the Northeast Monsoon (NEM; November to February) and the Pre-Southwest Monsoon (PSWM; March-May). Following the above, the abundance and biomass of micro-autotrophs increased from the SWM (av. 1827 � 1056 L-1 and av. 8 � 2.53 mu gC L-1) and peaked during the PSWM (av. 23963 � 17142 L-1 and av. 16 � 9.49 mu gC L-1, respectively). The micro-heterotrophs (mean size and abundance) also remained high during the PSWM, followed by NEM. However, the micro-autotroph mean size was minimum during the PSWM (av. 20883 � 2239 mu m3), which increased during the SWM (av. 43510 � 3611 mu m3) and NEM (av. 35245 � 8655 mu m3). The micro-detritus was found highly abundant during both the PSWM and the NEM following the temporal trend in the abundance and biomass of micro-autotrophs and micro-heterotrophs in the study region, suggesting the active transfer of energy to the next trophic levels through smaller plankton as well as detritus. Also, the positive interrelationship of these components indicates that the primary source of micro-detritus is the dead plankton materials, which is an apparent deviation from the traditional belief that KBW possibly gets loaded with more detritus during the SWM due to the floodwaters.
dc.languageen
dc.publisherElsevier Ltd
dc.relation.ispartofEstuar Coast Shelf Sci
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.titleImplications of micro-plankton and micro-detritus on the food web in the largest monsoonal estuary along the west coast of India
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Kochi, Kerala, India


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