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Time series monitoring of water quality and microalgal diversity in a tropical bay under intense anthropogenic interference (SW coast of the Bay of Bengal, India)

DRS at CSIR-National Institute of Oceanography

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Title Time series monitoring of water quality and microalgal diversity in a tropical bay under intense anthropogenic interference (SW coast of the Bay of Bengal, India)
 
Creator Shaik, A.R.
Biswas, H.
Reddy, N.P.C.
Rao, V.S.
Bharathi, M.D.
Subbaiah, Ch.V.
 
Subject BOTANY
AQUATIC COMMUNITIES
AQUATIC COMMUNITIES
CHEMISTRY AND BIOGEOCHEMISTRY
AQUATIC COMMUNITIES
AQUATIC ECOLOGY, PRODUCTIVITY
AQUATIC POLLUTION
POPULATION STUDIES
 
Description In recent decades, material fluxes to coastal waters from various land based anthropogenic activities have signifi- cantly been enhanced around the globe which can considerably impact the coastal water quality and ecosystem health. Hence, there is a critical need to understand the links between anthropogenic activities in watersheds and its health. Kakinada Bay is situated at the SW part of the Bay of Bengal, near to the second largest mangrove cover in India with several fertilizer industries along its bank and could be highly vulnerable to different types of pollutants. However, virtually, no data is available so far reporting its physicochemical status and microalgal diversity at this bay. In order to fill this gap, we conducted three time series observations at a fixed station during January, December and June 2012, at this bay measuring more than 15 physical, chemical and biological parameters in every 3 h over a period of 36 h in both surface (0 m) and subsurface (4.5 m) waters. Our results clearly depict a strong seasonality between three sampling months; however, any abnormal values of nutrients, biological oxygen demand or dissolved oxygen level was not observed. A Skeletonema costatum bloom was observed in December which was probably influenced by low saline, high turbid and high Si input through the river discharge. Otherwise, smaller diatoms like Thalassiosira decipiens, Thalassiothrix frauenfeldii, and Thalassionema nitzschioides dominated the bay. It is likely that the material loading can be high at the point sources due to intense anthropogenic activities, however, gets diluted with biological, chemical and physical processes in the offshore waters
 
Date 2015-10-27T11:41:19Z
2015-10-27T11:41:19Z
2015
 
Type Journal Article
 
Identifier Environmental Impact Assessment Review, vol.55; 2015; 169-181
http://drs.nio.org/drs/handle/2264/4837
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2015] Elsevier
 
Publisher Elsevier