Bacteriological examination of the water and sediments in Palhi and Salog rivers in Western Leyte, Philippines
Journal Title: Annals of Tropical Research - Year 2022, Vol 44, Issue 2
Abstract
Rivers around the world are threatened by destruction caused by anthropogenic activities despite the important services they provide for humanity. This study was conducted to determine the water classification and recommended beneficial uses of Palhi and Salog Rivers based on the most probable numbers of total coliforms, and also to evaluate the abundance of heterotrophic bacteria present in the water and sediments of the rivers as potential indicators of environmental disturbance. A Multiple-tube fermentation test was conducted to determine the most probable number of total coliforms in the river waters. Heterotrophic plate count of total aerobic heterotrophic bacteria was determined by counting the colony-forming units that grew on nutrient agar. Geometric most probable number means of total coliforms revealed that only the upstream of Palhi and Salog Rivers could be used for contact recreational activities. The midstream and downstream of both rivers are recommended for non-contact recreational activities only, due to elevated total coliforms. The heterotrophic plate count of total aerobic heterotrophic bacteria of water and sediment samples for the three stations in Palhi River were not significantly different while in Salog River higher numbers of total aerobic heterotrophic bacteria occurred in the downstream compared to the upstream. However, no significant differences on the heterotrophic plate count of total aerobic heterotrophic bacteria levels were found between the water and sediments for the two rivers. The results of this study imply that monitoring and proper management of the rivers should be done by all sectors of the community for the protection of these invaluable resources.
Authors and Affiliations
Rufina Mae C. Lumagbas, Jayzon G. Bitacura
Keywords
Related Articles
- EP ID EP755455
- DOI https://doi.org/10.32945/atr4424.2022
- Views 43
- Downloads 0
Isolation and identification of bacteriocin-producing lactic acid bacteria from plants in Mount Makiling Forest Reserve, Philippines
Sixty-three lactic acid bacteria (LAB) were isolated from trapped or stagnated water in parts of 14 different plant species in Mount Makiling Forest Reserve, Philippines and were screened for bacteriocin production. Thir...
Influence of plant growth regulators and UV light exposure on the formation and phenolic content of stevia rebaudiana bertoni callus: a preliminary study
This study was conducted to evaluate the effect of different combinations and levels of plant growth regulators, 2,4-dichlorophenoxy acetic acid (2,4-D) and 6-benzylaminopurine (BAP), on callus induction of Stevia rebaud...
Participatory extension for empowerment: Paradoxes unboxed in the fishery sector
The study looked at levels of participation in the extension approach of the NGO tapped to implement coastal resource management under the Fishery Sector Program and the Fisheries Resource Management Project (FSP-FRMP) i...
Detection and molecular characterization of phytoplasma affecting vegetables in Eastern Visayas, Philippines
Phytoplasma-like diseases were observed affecting bitter gourd, Loofah, string bean, “Baguio” bean, cucumber, and tomato in Eastern Visayas, Philippines. The infected vegetables commonly show little leaf/witches’ broom s...
Efficacy of Trichoderma harzianum against Fusarium oxysporum and Rhizoctonia solani on bean and tomato plants
Experiments were conducted in the laboratory, greenhouse, and field at the Papua New Guinea University of Technology (PNGUT) to assess the efficacy of Trichoderma harzianum against Rhizoctonia solani and Fusarium oxyspor...