Effect of harmful algal bloom on coastal water properties at Sepanggar Bay, Sabah

Low, Sin Ee (2007) Effect of harmful algal bloom on coastal water properties at Sepanggar Bay, Sabah. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Harmful algal bloom (HAB) becomes a most concerned environmental issue in Sabah recently. HAB caused by Cochlodinium occur more frequent in west coast of Sabah than previous. The water discolouration by high concentration of Cochlodinium in seawater causes mass mortality of fish and invertebrates. Cochlodinium clogging and damaging the fish and invertebrates gills. The coastal water properties play important roles during algal bloom. Algal will bloom when there is an optimum condition. Data analysis was done by using software named PRIMER 6 (Plymouth Routines In Multivariate Ecological Research) consists of a wide range of univariate, graphical and multivariate routines for analyzing the species abundance or biomass matrices that arise in biological monitoring of environmental impact and more fundamental studies in community ecology, together with associated physical-chemical data. From this study, Cochlodinium was found affecting the physical water properties, such as temperature, DO, salinity, pH and water transparency. Bloom of Cochlodinium made the temperature increase due to the rapid metabolic activity. The level of salinity rise because of the high temperature which promotes evaporation. Besides, decreases the light penetration due to the high density of cells in water. It also result low oxygen conditions as the huge activities of bacteria which responsible in decomposition activities. The pH value was found higher during bloom consequence of greater the hydrogen ion concentration in the seawater.

Item Type: Academic Exercise
Uncontrolled Keywords: Harmful algal bloom, Cochlodinium, water discolouration, PRIMER 6, hydrogen ion concentration
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 10 Mar 2014 05:37
Last Modified: 12 Oct 2017 06:08
URI: http://eprints.ums.edu.my/id/eprint/8448

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