02. DSSC Electronic Theses and Dissertations
Permanent URI for this communityhttps://hdl.handle.net/20.500.14578/3
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Item Species composition, diversity, abundance, and microhabitat preferences of anuran species in the Miral river, Bansalan, Davao del SurUbat, Drahcir E. (Davao del Sur State College, 2025-05)A comprehensive anuran survey was conducted across three sites along the Miral River in Bansalan, Davao del Sur—Barangay Managa (upstream), Barangay Tubod (midstream), and Barangay Poblacion Uno (downstream). Using 270 man-hours of cruising and mark-release-technique, the survey documented anuran species, assessed habitat associations, and generated baseline data on Mindanao's amphibian diversity. A total of 104 anuran individuals were recorded, representing six species and four families, with 67% being non-endemics and 33% endemic to the Mindanao faunal region. Limnonectes magnus was noted as nearly threatened. Species diversity was highest upstream (H' = 1.52, S = 6), moderate midstream (H' = 1.05, S = 4), and lowest downstream (H = 0.43, S = 2), but were not statistically significant (p = 0.2193). While species composition varied between sites (p = 0.1875). Most anurans utilized both aquatic and terrestrial microhabitats, indicating microhabitat overlap. This study revealed that Rhinella marina was strongly linked to warmer water, higher pH, and elevated air temperature—conditions typical of downstream habitats. Conversely, upstream habitats, with dense canopy, abundant moss, leaf litter, and minimal disturbance, supported species like Polypedates leucomystax and Kaloula pulchra. Obviously, principal component analysis revealed that elevation was the most influential environmental factor with strong association habitat variables affecting anuran preferences. Endemic species were associated with intact forest areas, though signs of forest clearing for agriculture indicated environmental stress. The dominance of invasive species and the low presence of the near-threatened Limnonectes magnus underscore the urgent need for conservation efforts to protect native amphibians and restore natural habitats in the Miral River ecosystem.Item Evaluation of design greywater filtration system with treatment component using Moringa oleifera seed powderDe Manuel, Charisse B. (Davao del Sur State College, 2024-06)The study on the "Evaluation of Designed Filtration System with Treatment Component Using Moringa oleifera Seed Powder" was conducted last February- April 2024 at Sinaragan, Matanao, Davao del Sur. A Completely Randomized Design (CRD) was used in the study. There were three treatments: T1 - 5mL/L MO seed powder stock solution, T2 - 7.5 mL/L MO seed powder stock solution, and T3 - 10 mL/L MOS seed powder stock solution, which were replicated three times. The performance of the combined grease trap, biosand filter, and Moringa oleifera seeds greywater filtration system was assessed based on the Biochemical Oxygen Demand (BOD), Total Suspended Solids (TSS), Electrical Conductivity (EC), and pH of the treated greywater. The filtration system, utilizing various MOSP dosages as a treatment component, effectively enhanced wastewater quality. The results indicated that varying the MOSP dosage significantly affected the system's performance regarding Electrical Conductivity (EC). Analysis using the Least Significant Difference (LSD) test revealed that the greywater produced by using the developed filtration system with the application of T1 notably differed from that applied with T3, with treated greywater applied with T1 achieving the lowest EC, reducing the untreated greywater's EC by 14.78%. The developed system also contributed to substantial reductions in Biochemical Oxygen Demand (BDO) and Total Suspended Solids (TSS) of greywater, achieving reductions of 73.65% to 80.68% and 86.17% to 87.88%, respectively. The system was also able to maintain the pH of treated greywater at neutral level. Treatment of greywater in the developed filtration system applied with different levels of MOSP at 5 ml/L, 7.5 ml/L, and 19 ml/L can produce a similar reduction effect in BOD, TSS, and pH levels. The system was able to reduce BOD, TSS, and EC, and retained neutral pH of treated greywater, meeting regularly standards set by DAO 2016-08 and PAES 232:2017, confirming its overall effectiveness in treating greywater.Item Water consumption and growth of spring onion (Allium fistulusom L.) under different nutrient solution depths in kratky hydroponics under shaded conditionsDabalos, Marc Jay P. (Davao del Sur State College, 2024-06)The study was conducted at Davao del Sur State College (DSSC), Brgy. Matti, Digos City, Davao del Sur, to investigate the effect of varying depths of nutrient solution on the water consumption and growth of spring onion. The experiment followed a Completely Randomized Design (CRD) with three treatments and three replications. The treatments were T1 (15cm depth of nutrient solution), T2 (10 cm depth of nutrient solution), T3 (5 cm depth of nutrient solution). The effect of the depths of nutrient solution was determined with regards to the water consumption, plant height, stem diameter, number of leaf, root length, number of shoots per plant and the temperature of nutrient solution. The gathered data was statistically evaluated using analysis of variance (ANOVA) at a significance level of 1% to 5% based on the results of the study, the nutrient solution depths showed no significant effect on the water consumption and growth response of spring onion (Allium fistulusom L.) and also to the nutrient solution temperature.Item GIS-based spatial inventory and characterization of spring water sources in the Municipality of Malungon, Sarangani ProvincePesiao, Analie C. (Davao del Sur State College, 2024-08)This study was conducted to determine the spatial distribution of spring water sources and to characterize the discharge and elevation of spring water sources in the municipality of Malungon, Sarangani Province. The study was carried out within the 30 barangays of Malungon, Sarangani Province. A Global Positioning System (GPS) device was used to obtain the coordinates and elevation of the identified springs. A calibrated 12-L container and a digital stopwatch were used to measure the discharge of the identified spring water sources. There were 76 identified springs in the municipality of Malungon, Sarangani Province. The total discharge of all identified springs was found to be 62.650L/sec, with barangay Data Batong having the highest total discharge of 24L/sec. The highest elevation of the identified springs was located in barangay Data Bila at 827m above sea level. The potential water yield from these springs was calculated to be 5,412.880m³ /day. The study concludes that the discharge of spring water sources varies based on location, with elevation being a significant factor affecting discharge. The results provide valuable information for government agencies and other stakeholders involved in water development and planning in Malungon.Item Evaluation of magnetized miracle fruit (Crescentia cujete) peel ash in the adsorption of methylene blue at different dosageCalledo, Carol Joy A. (Davao del Sur State College, 2024-08)This study evaluated the magnetized miracle fruit peel ash (MMFPA) as an efficient methylene blue adsorbent. The effect of dosage (0.5 g, 1 g. 1.5 g, 2 g, 2.5 g, and 3 g) was studied to determine the equilibrium concentration, equilibrium adsorption capacity, and removal efficiency of the adsorbent. The experimental data was analyzed using the One-way ANOVA at 1% and 5% level of significance. The treatment means was compared using the Tukeys's Honest Significant Difference (HSD) test. Based on the result in the equilibrium concentration, Dosage Six (D6) had the lowest equilibrium concentration at 0.7997 ppm. In relation to the adsorption equilibrium capacity, D6 had the lowest equilibrium adsorption capacity at 1.64 mg/g. In the removal efficiency, D6 exhibited highest removal efficiency at 98.40%, showing a substantial decrease in the concentration in methylene blue. In general, this study concluded that magnetized miracle fruit peel ash demonstrated a high potential as an economical alternative for treatment of dye contaminated wastewater.