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Dinoflagellate cyst assemblages in recent sediments of Visakhapatnam harbour, east coast of India: Influence of environmental characteristics

DRS at CSIR-National Institute of Oceanography

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Title Dinoflagellate cyst assemblages in recent sediments of Visakhapatnam harbour, east coast of India: Influence of environmental characteristics
 
Creator DeSilva, M.S.
Anil, A.C.
Sawant, S.S.
 
Subject cysts
ecological distribution
physicochemical properties
water column
 
Description The distribution and abundance of dinoflagellate cysts in recent sediments from Visakhapatnam harbour, east coast of India was investigated and compared with sediment characteristics and physico-chemical variables of the overlying water column. The cyst abundance varied from 11 to 1218 cysts g sup(-1) dry sediment. Changes in the cyst assemblages from phototrophic to heterotrophic forms were observed from inner to outer harbour stations, and related to changes in environmental characteristics. Enhanced cyst production of potentially harmful dinoflagellate Protoceratium reticulatum was recorded in the inner harbour stations with higher nutrient concentrations. Protoperidinium cysts were the most diversified group, and were dominant in the outer harbour stations having improved water conditions and circulation. This study points out the potential use of dinoflagellate cyst populations in providing information on environmental conditions.
 
Date 2013-02-04T04:41:19Z
2013-02-04T04:41:19Z
2013
 
Type Journal Article
 
Identifier Marine Pollution Bulletin, vol.66; 2013; 59-72
no
http://drs.nio.org/drs/handle/2264/4239
 
Language en
 
Relation Mar_Pollut_Bull_66_59.jpg
 
Rights An edited version of this paper was published by Elsevier. Copyright [2012] Elsevier
 
Publisher Elsevier