Soil and water quality in relation to the abundance of nipa palm (Nypa fruticans) at Labac freshwater ecosystem, Naic, Cavite/
Irish John A. Avis and Olive Jane D. Carosino .--
- Manila: Technological University of the Philippines, 2019.
- x, 121pages: 29cm. +1 CD-ROM (4 3/4in.)
Thesis (undergraduate)
College of Engineering .--
Includes bibliography:
The study was conducted to determine the anthropogenic activities, assessed the soil and water quality, and the abundance of Nipa palm in Labac Freshwater Ecosystem in Naic, Cavite, during the months of July to November2018. The physico-chemical and biological properties of soil were determined in terms of soil pH, nitrogen, phosphorus, potassium and organic matter, and for the water quality determination were the temperature, turbidity, pH, salinity, conductivity, dissolved oxygen, nitrates, phosphates, and total coliform. Composite sampling technique was used in the collection of soil and water samples on two selected sites in the said riverine ecosystem; the first site was on the downstream region, near the port of boats, while the second site was on the upstream portion, near the Carcucia place. ACUR method was used to measure the abundance of Nipa palm in the upstream region, since the said species no longer thrive on the downstream part. Survey questionnaires were administered to the respondents to determine the anthropogenic activities and the perception of the residents on the protection and conservation measures of the river. Based on the findings, the most common anthropogenic activities that affect the water quality of the Labac river are fishing and aquaculture practices. The assessment of soil quality, experimental analyses showed that the pH from soils in both sites ranges from 4.21-9.8. Soil in Naic in terms of organic matter content ranges from 0.13 kg/ha-0.22 kg/ha in downstream, and 1.79-2.81 in upstream. The nitrogen level is considerably low (0.0065kg/ha-0.011kg/ha in downstream, and 0.0895 kg/ha-0.1405kg/ha in upstream), phosphorus content is low in downstream (4.21kg/ha-5.01kg/ha), and excessive in upstream (56.49kg/ha-190.23kg/ha), potassium level is high in downstream (0.7kg/ha-0.89kg/ha), and excessive in upstream (1.46kg/ha-3.49kg/ha). Assessing the water quality, all the parameters were within the standard criterion set by DENR for Class C waters, except for the total coliform. Based on the ACUR method, the Nipa palm count on the upstream region is abundant.