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Phytoplankton community structure in local water types at a coastal site in north-western Bay of Bengal

Baliarsingh, SK and Suchismita, S and Lotliker, AA and Sahu, KC and Srinivasa Kumar, T (2016) Phytoplankton community structure in local water types at a coastal site in north-western Bay of Bengal. Environmental Monitoring and Assessment, 188 (427). pp. 1-15.

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Abstract

A comprehensive analysis on seasonal distribution of phytoplankton community structure and their interaction with environmental variables was carried out in two local water types (type 1 < 30 m isobath and Type 2 > 30 m isobath) at a coastal site in north-western Bay of Bengal. Phytoplankton community was represented by 211 taxa (146 marine, 37 fresh, 2 brackish, 20 marine–fresh, and 6 marine–brackish–fresh) belonging to seven major groups including 45 potential bloom forming and 22 potential toxin producing species. The seasonal variability depicted enrichment of phytoplankton during pre-monsoon in both water types. Total phytoplankton abundance pattern observed with inter-annual shift during monsoon and post-monsoon period at both water types. In both water types, diatom predominance was observed in terms of species richness and abundance comprising of centric (82 sp.) and pennate (58 sp.) forms. Pennate diatoms, Thalassiothrix longissima and Skeletonema costatum preponderated in both the water types. The diatom abundance was higher in type 1 in comparison to type 2. In general, SiO4 found to fuel growth of the dominant phytoplankton group, diatom in both the water types despite comparative lower concentration of other macronutrients in type 2

Item Type: Article
Additional Information: Copyright of this article belongs to Springer
Uncontrolled Keywords: Phytoplankton Diatom Nutrient Bay of Bengal Water type Chlorophyll-a
Subjects: Oceanography > oceanography
Depositing User: INCOIS Library
Date Deposited: 07 Jul 2016 05:39
Last Modified: 07 Jul 2016 05:39
URI: http://moeseprints.incois.gov.in/id/eprint/4080

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