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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Nov 2012, 33 (6)                                     Back


nstantaneous and historical temperature effects on a-pinene

Phytoplankton diversity in the Parangipettai coastal waters, southeast coast of India

 

Author Details

 

M. Rajkumar

Institute of Oceanology, Chinese Academy of Sciences, Qingdao-266071, China

K. Thillai Rajasekar

Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai?608 502, India

Jun Sun

(Corresponding author)

College of Marine Science and Engineering, Tianjin University of Science and Technology,

Tianjin - 300457, China

e-mail : sunjun@qdio.ac.cn

I.R. Jenkinson

Institute of Oceanology, Chinese Academy of Sciences, Qingdao-266071, China

V. Ashok Prabu

Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai ? 608 502, India

P. Perumal

Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai ? 608 502, India

 

 

Publication Data

Paper received:

29 October 2009

 

Revised received:

15 May 2010

 

Re-revised received:

10 November 2010

 

Accepted:

15 August 2011

 

Abstract

An investigation was carried out during June 2005 to May 2007 on hydrography, composition and community structure of phytoplankton including chlorophyll a in Parangipettai coastal waters (southeast coast of India). Air and surface water temperatures varied from 25.5 to 31.2 ?C and from 25 to 29.3?C, respectively. Salinity values varied from 5 to 33.1? and the pH ranged between 7.2 and 8.3. Dissolved oxygen content varied from 3.1 to 7.9 mg l-1 while the light extinction coefficient values (LEC) ranged between 1.8 and 11.0 cm. The range of inorganic nutrients viz., nitrate, nitrite, phosphate and silicate were: 6.5 - 27.0 ?M; 1.0 - 8.9 ?M; 0.1 - 3.0 ?M and 15.0 - 140 ?M, respectively. The range of chlorophyll a was: 2.0 - 7.5 ?g l-1. Presently, 117 phytoplankton species representing different classes viz: Bacillariophyceae (66); Dinophyceae (22); Cyanophyceae (19); Chlorophyceae (7) and Chrysophyceae (3) were recorded. The phytoplankton cell abundance varied from 0.14 to 132 cells ml-1, with peak diversity (3.52 bits ind.-1) during summer season. The maximum abundance was found during summer season coinciding with the stable hydrographical conditions. Canonical Correspondence Analysis was applied in this study for discriminating environmental factors effecting on phytoplankton community at species level.

 

Key words

Phytoplankton diversity, Canonical correspondence analysis, Parangipettai coastal waters

 

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