Home⇛NRCP Research Journal⇛vol. 23 no. 2 (2024)

Physicochemical Monitoring and Assessment of the Water Quality in the Mangrove Forest of Del Carmen, Siargao, Philippines

Dimple May Gianne Q. Dumaguit | Allyzxia Venisse H. Navarro | Paulene Anne S. Chen | Dino T Tordesillas

Discipline: environmental sciences

 

Abstract:

Water quality monitoring is essential in determining the basic factors affecting the water’s conditions and identifying monthly trends in the aquatic ecosystem. This study monitored and assessed the water quality in the mangrove forests of Del Carmen, Siargao Island. For a period of four months, five stations were examined for several physicochemical characteristics. Temperature, pH, and dissolved oxygen (DO) were measured using a multiparameter probe, while phosphate and nitrate concentrations were determined using commercially available test kits. Aside from DO, all physicochemical parameters met the standard for marine protected waters, based on the Department of Environmental and Natural Resources Administrative Order 2016–08 (DAO 2016–08). The mangroves’ soil contains bacteria that rely on DO for their metabolic processes, which explains the comparatively low DO levels that are typically measured in these habitats. Appropriate statistical analyses revealed significant temporal changes in the temperature and DO levels, as well as spatial changes in pH levels. The fluctuations brought about by the monsoonal cycles resulted in warmer temperatures in July and August, while October and November had higher DO levels. Additionally, lagoonal stations showed increased pH levels due to reduced freshwater input. Overall, the water quality of the mangrove forests in Del Carmen is within the standard level for marine protected waters and only varies spatiotemporally due to monsoonal cycles and the type of coastal area.



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