Bakong (Hanguana malayana) associated-species and water quality in Laguna De Cagayan Lake, Northern Philippines

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Research Paper 01/06/2020
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Bakong (Hanguana malayana) associated-species and water quality in Laguna De Cagayan Lake, Northern Philippines

Andy L. Catulin, Engr. Erwin C. Torio
J. Bio. Env. Sci.16( 6), 23-32, June 2020.
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One aquatic plant species are of great interest in the province of Cagayan, Northern Philippines. This is Bakong (Hanguana malayana) species that are dominantly found in Laguna de Cagayan formerly known as Bangalao Lake located 18o14’ 24” N and 121o54’35” E at Barangay Luga, Sta. Teresita, Cagayan. Bakong is locally used for fiber; its’ weaved products being one of the major trade commodity and attraction of Nammunit Ecotourism Festival held annually. It is subsumed that problem will emerge if its harvesting rate is greater than its regeneration capacity. This study was conducted to determine the ecology of Bakong, diversity of different Bakong-associated species, and assess the physicochemical water-soil environment of Laguna de Cagayan Lake. The rapid ecological assessment was employed in the study using both descriptive, qualitative research design for on-site parameters and complete random design for laboratory parameters. The study revealed a total of 20 associated species, belonging to sixteen (16) different plant families; importance value of Bakong plants is 55.56% suggesting that Bakong Species is the most dominant aquatic plant in the lake ecosystem with 0.672 Simpson diversity index (SDI). The high diversity index of the lake may be attributed to its geographical location, land topology, and ecotone to the surrounding ecosystem. The results also showed that the physical properties of the lake such as Total Dissolved So; id (<200ppm), temperature (32oC), pH (7.2) and turbidity index (0.35) passed the environmental standard; chemical properties such as iron (<0.2mg/L) and lead content (<0.2mg/L) is within the required, permissible level while the dissolved oxygen (DO > 10 mg/L) content exceeded the desired amount. This implies that the water of Laguna de Cagayan Lake is still in good condition that permits the growth of floral species thriving in the area. These findings show the need for the lake to be maintained and protected for its sustainable viability for economic, social, environmental, aesthetic and for other beneficial purposes.


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