Nearshore and Offshore Comparison of Marine Water Quality Variables Measured During SESMA 1
Bong, Chui Wei, and Lee, Choon Weng, (2008) Nearshore and Offshore Comparison of Marine Water Quality Variables Measured During SESMA 1. Malaysian Journal of Science, 27 (3). pp. 25-31. ISSN 13943065
Laboratory of Microbial Ecology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 KUALA LUMPUR, Malaysia
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 we measured in offshore sites sampled 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 how anthropogenic activities are affecting the marine water quality in Malaysia.
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