Assessment of Spatial and Temporal Variationsof Water Quality for Future MaricultureOperation in Ambong Bay, Sabah, Malaysia

Fang Sing Ong, and Julian Ransangan, (2018) Assessment of Spatial and Temporal Variationsof Water Quality for Future MaricultureOperation in Ambong Bay, Sabah, Malaysia. Open Journal of Marine Science, 8 (1). pp. 1-19. ISSN 2161-7392

[img] Text
Assessment of Spatial and Temporal Variationsof Water Quality for Future MaricultureOperation in Ambong Bay, Sabah, Malaysia.pdf

Download (216kB)

Abstract

Study was conducted with the aim to understand the temporal and spatial variations of water quality parameters (temperature, salinity, pH, DO, TSS, NO3-, NO2-, NH3-N and PO4-P, and phytoplankton cell density) in Ambong Bay, Sabah, Malaysia in order to provide reference for future mariculture development in the bay. Samplings were carried out once a month in two stations (coastal and open sea) within the bay for 12 months period from September 2015 to August 2016. Results showed that there were significant differences in pH and NO2- when compared spatially, whereas salinity, DO, TSS, phytoplankton cell density, NO3-, NH3-N, and PO4-P were temporally significant. The fermentation processes by anaerobic bacteria, organic acids from decaying vegetation and acidic clays in the mangrove soils might explain the significant spatial differences in pH and NO2-. The bay was dominated by dinoflagellate, Prorocentrum spp. (mean abundance of 16.23% and 24.44%, respectively) a potentially toxic algae species. Correlation matrix showed that NH3-N was positively correlated with PO4-P (r = 0.475, p < 0.05) but negatively correlated with salinity (r = –0.517, p < 0.01). Besides, salinity was positively correlated with DO (r = 0.505, p < 0.05) and TSS (r = 0.408, p < 0.05). In addition, DO and TSS were also positively correlated (r = 0.451, p < 0.05). Phytoplankton cell density was positively correlated with TSS (r = 0.644, p < 0.01). In general, the water quality in Ambong Bay is within the standard values permitted by the Malaysia Marine Water Quality standard for marine life, fisheries, coral reefs, recreational and mariculture (Class 2), except for NO3-. In conclusion, any mariculture operation to take place in Ambong Bay in the near future should take the temporal variation of the water quality into account. Moreover, effects of toxic phytoplankton to culture fishes should also be taken care and monitored frequently.

Item Type: Article
Uncontrolled Keywords: Water Parameters, Spatial and Temporal Variations, Ambong Bay, Aquaculture
Subjects: Q Science > QD Chemistry
Depositing User: Puan Dg Masniah Ahmad
Date Deposited: 30 Apr 2019 05:22
Last Modified: 30 Apr 2019 05:22
URI: http://eprints.ums.edu.my/id/eprint/21880

Actions (login required)

View Item View Item