Nearshore and offshore comparison of marine water quality variables measured during SESMA 1

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Chui, Wei Bong
Choon, Weng Lee

Abstract

Total suspended solids (TSS), dissolved oxygen (DO) and dissolved inorganic nutrient concentrations [ammonium (NH4), nitrite (NO2), nitrate (NO3), phosphorus (PO4) and silicate (SiO4)] were measured in offshore sites covered by the first Scientific Expedition to the Straits of Malacca or SESMA 1 cruise. Both TSS and DO showed striking differences between nearshore and offshore sites. TSS was elevated nearshore (> 250 mg l-1) but was < 100 mg l-1 offshore. DO was at healthy levels (> 300 µM or 9.6 mg l-1) offshore but were low and sometimes exhibited hypoxia (< 125 µM or 4 mg l-1) nearshore. Dissolved inorganic nutrients were generally higher nearshore and this reflected eutrophication. High TSS, low DO and eutrophication showed that anthropogenic activities are affecting the marine water quality in Malaysia

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How to Cite
Wei Bong, C., & Weng Lee, C. (2008). Nearshore and offshore comparison of marine water quality variables measured during SESMA 1. Malaysian Journal of Science, 27, 25–31. Retrieved from https://sare.um.edu.my/index.php/MJS/article/view/8746
Section
Original Articles