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A comparative investigation of physicochemical and biological variables of Aerial & Port Blair Bays, Andaman Islands with focus on the anthropogenic influence

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Title A comparative investigation of physicochemical and biological variables of Aerial & Port Blair Bays, Andaman Islands with focus on the anthropogenic influence
 
Creator Sahu, B K
Goswami, P
Begum, M
Jha, D K
Vinithkumar, N V
Dharani, G
 
Subject Biomass
Chlorophyll-a
Physicochemical parameters
Phytoplankton
Oceanic island
Zooplankton
 
Description 79-90
Major anthropogenic activities surround the Port Blair Bay, while Aerial Bay remains as a pristine environment. A field study was carried out during the south-west monsoon season (July – August, 2011) in the two bays to compare the physico-chemical parameters and their effect on phytoplankton community structure. Among the physico-chemical parameters, water temperature (p < 0.01, n = 18), DO (p < 0.01, n = 18) and TP (p < 0.05, n = 18) showed significant variation between the Bays. Salinity and Redfield ratio (N:P) was lower in Aerial Bay as compared to Port Blair Bay; while the Si:N ratio was higher in the Aerial Bay. The average chlorophyll-a concentration as well as species richness was found to be higher in the Port Blair Bay as compared to the Aerial Bay. The highest phytoplankton density and centric diatom abundance were observed in Port Blair Bay. In Aerial Bay, the centric diatoms like Dactyliosolen fragilissimus (44.5 %) and Guinardia flaccida (7.1 %) dominated, while in the Port Blair Bay, the centric diatom Skeletonema costatum (25.0 %) and a pennate diatom Nitzschia closterium (24.3 %) dominated the phytoplankton. The phytoplankton community was influenced by the nutrients from the tidal mud flats and rain-fed rivulets in the Aerial Bay; while, in the Port Blair Bay, the phytoplankton abundance was influenced by nutrients from land runoff, inundated areas and anthropogenic sources.
 
Date 2024-03-04T05:59:08Z
2024-03-04T05:59:08Z
2024-02
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscpr.res.in/handle/123456789/63521
https://doi.org/10.56042/ijms.v52i02.6930
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJMS Vol.52(02) [February 2023]