Studies on water quality and pathogenic bacteria in coastal water Langkawi, Malaysia

Khan Chowdhury, Ahmed Jalal and Nordin, Noor Faizul Hadry and M., Azrul Naim and John, Akbar and Yunus, Kamaruzzaman (2012) Studies on water quality and pathogenic bacteria in coastal water Langkawi, Malaysia. Journal of Environmental Biology, 33 (4). pp. 831-835. ISSN 0254-8704 (P)

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Abstract

A study on physico-chemical parameters and pathogenic bacterial community was carried out at the coastal waters of Pulau Tuba island, Langkawi. The physico-chemical parameters such as temperature (27.43-28.88 degrees C), dissolved oxygen (3.79-6.49 mg l(-1)), pH (7.72-8.20), salinity (33.10-33.96 ppt), total dissolved solids (32.27-32.77 g l(-1)) and specific conductivity (49.83-51.63 mS cm(-1)) were observed. Station 3 and station 4 showed highest amount of nitrates (26.93 and 14.61 microg at N l(-1)) than station 1 (2.04 microg at N l(-1)) and station 2 (4.18 microg at N l(-1)). The highest concentration (12.4 +/- microg l(-1)) of chlorophyll a was observed in station 4 in October 2005. High phosphorus content (561 microg P l(-1)) was found in the station 2. Thirteen bacterial isolates were successfully identified using API 20E system. The highest amount of bacteria was observed at Station 4 (3400 CFU ml(-1)) and the lowest numberwas at Station 2 (890 CFU ml(-1)). Out of identified 13 Gram-negative bacterial isolates dominant species were Aeromonas hydrophila, Klebsiella oxytoca, Pseudomonas baumannii, Vibrio vulnificus, Proteus mirabilis, Providencia alcalifaciens and Serratia liquefaciens. Apart from this, oil biodegrading Pseudomonas putida were also identified. The study reveals the existing status of water quality is still conducive and the reasonably diverse with Gram-negative bacteria along the Pulau Tuba Langkawi.

Item Type:	Article (Journal)
Additional Information:	3575/29254
Subjects:	Q Science > Q Science (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Marine Science Kulliyyah of Engineering
Depositing User:	Professor Dr. Kamaruzzaman Yunus
Date Deposited:	01 Mar 2013 09:15
Last Modified:	15 Jan 2018 18:05
URI:	http://irep.iium.edu.my/id/eprint/29254

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