UPV Theses and Dissertations
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Item Community structure of mangroves in selected barangays in Sebaste, AntiqueAlorro, Mary Juandin Grace F. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2007-03)Mangroves are higher plants that are primarily found predominantly in the intertidal areas such as estuaries and lagoons of the tropical and subtropical shorelines. This study was conducted to assess the community structure of mangroves in Barangay Callan, Barangay Idio, Barangay Poblacion, Barangay Abiera, and Barangay Bacalan, Sebaste, Antique, using the transect line method. Specifically, it aimed to determine selected physical and chemical factors such as salinity, pH, temperature for water and soil as well as characterization of the substrate; identify and classify true mangrove species present in the area; and describe the community structure in terms of stand basal area, stems per hectare, relative density, relative frequency, relative dominance, importance value, Shannon index of diversity, zonation patterns, seedling and sapling density. No study has been done to document the community structure of mangroves in Sebaste, Antique thus, this study was done to provide vital information needed for its proper management. Three stations were selected in Sebaste, Antique. Four (4) species of true mangroves were identified, belonging to three (3) families: Palmae - Nypa fruticans; Rhizophoraceae - Rhizophora apiculata, Bruguiera gymnorrhiza; and Euphorbiaceae - Excoecaria agallocha. The study area had a water salinity range of 0.6 ppt to 15.3 ppt; water temperature range of 28.3°C to 35.4°C; water pH range of 7.1 to 7.7; soil temperature range of 28.3°C to 34.7°C; and soil pH range of 6.5 to 7.2. Basal area ranges from 3.16 m2/ha (Rhizophora apiculata) to 5.88 m2/ha (Excoecaria agallochd) to 8.19 m2/ha (Bruguiera gymnorrhiza) . The species with the highest average of stems per hectare were Excoecaria agallocha and Bruguiera gymnorrhiza with 300 as well as the highest average density value of 100 for Excoecaria agallocha. Nypa fruticans had the highest relative frequency and relative dominance. Among the four species, the most important species was Nypa fruticans. The Shannon Index of Dominance was 0.403 which was quite low in terms of diversity as influenced by the dominance of Nypa fruticans.Item Gross alpha and gross beta radioactivity and heavy metal concentration profiles of well water of the Calahunan dump site, Mandurriao, Iloilo CityAmarante, Hena Charma; Basquez, Mark Anthony; Brunio, Christian Allan; Dable, Nesel; De la Pena, Pamela-Di; Genterola, Janis; Oredina, Josette Marie; Padayhag, Dave (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2005-03)The study aimed to establish presence of radioactivity and concentration of heavy metals specifically lead and chromium in drinking water from wells within one-kilometer radius from the approximated center of the Calahunan dump site. Results showed that four out of twelve wells have positive results fro gross alpha activity and gross beta activity: wells 2A, 2C, 3A, and 3D. Well 2A, 2C and 3D registered alpha activities of 0.54, 0.033 and 0.369 Bq/L respectively while Well 3A registered beta activity of 1.0 Bq/L. Wells 2A and 3D exceeded the radiological limits set by WHO and PNSDW of 0.1 Bq/L for alpha activity and 1.0 Bq/L for beta activity. These wells that are found adjacent to the perimeter fence of the dump site registered alpha activity (wells 2A, 2C and 3D) and beta activity (well 3A). Radiological activities in all other wells sampled registered less than lower limit of detection. For gamma activity, all wells recorded 137- Cs and 134-Cs activity less than the lower limit of detection. For chromium and lead concentration using FAAS, only well 3C has a chromium concentration of 0.0952 ppm and this exceeded the PNSDW standard for chromium in drinking water (0.05 ppm) FAAS has not recorded any value for lead. For chemical constituent analysis using XRF, two wells in zone 1 (LA and IC), have recorded lead concentration of 0.9 and 0.136 ppm, respectively. In zone two, only well 2D registered a lead concentration of 0.248 ppm. In zone 3, well 3C registered a lead concentration of 0.397 ppm. For chromium concentration, only well 2A in zone 2 has a chromium concentration of 1.79 ppm. The spot interview and ocular inspection found out that the following garbage are disposed of indiscriminately tn the dump site: (1) Television picture tubes, (2) Dysfunctional Computer Monitors, (3) Used syringes and needles, (4) Hospital wastes, (5) Automobile batteries and dry cells, (6) scrap iron, tin cans, paint cans, paint cans, etc., (7) polyethylene bottle, glass bottles, and containers of similar types, and (8) other organic and inorganic wastes. Wells whose values for gross alpha, lead, and chromium concentration exceeded the standard are unsuitable for dinking and other domestic uses. The observation that wells (2A and 3D) near the Calahunan dump site registered higher-than-standard alpha activity may be a good basis to conduct further research particularly on the effect of leachate from dump site.Item Fungal pathogens associated with Sonneratia alba: A comparative study between oiled and unoiled sites within Taklong Island National Marine Reserve (TINMAR), Nueva Valencia, GuimarasAlbacete, May Therese F. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2009-03)Majority of researches on impacts of oil spills on mangroves focused on the immediate post-spill acute effects. However, the persistence of oil in sediments at oil spill sites has been reported in a number of published works. As such, this remaining oil could serve as source of stress to mangroves resulting into the expression of sub-lethal effects such as changes in foliage and canopy, abnormalities in reproductive structures among others. Furthermore, oil in mangroves also has the potential of increasing fungal attacks due to their impairment of natural defense mechanisms such as salt removal from leaves and trunks. Thus, this study was conducted to determine if there was a difference in fungal species composition and frequency of occurrence of fungal population of mangrove leaves collected in oiled and unoiled areas within Taklong Island National Marine Reserve, Nueva Valencia, Guimaras following the spill that occurred in August I1,2006. Fungi from diseased leaves of Sonneratia alba were isolated and characterized using Acidified Potato Dextrose Agar (APDA) for samples collected in January 2009 only. A total of 7 and 6 species were identified from among the isolates in oiled and unoiled sites. Although there is a little difference in species composition, almost all the isolated species was frequently occurring in both oiled and uncoiled sites. Gliomastix morurom (5.8%) in the unoiled site was only frequently occurring. The results may imply that difference in frequency of occurrence of certain species might be an indicator for sub-lethal effects of oil but needs further investigations to consider environmental factors among other factors.Item Density of mangrove trees in selected municipalities in the Province of Antique, Panay Island, PhilippinesArelis, Ian Jerwin C. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2006-03)Mangroves line one quarter of the world’s tropical coastlines, and approximately 117 countries and territories have mangrove resources within their borders. Although over recent years mangrove deforestation has occurred at a phenomenal rate worldwide, constant assessment in the Philippines has been made to monitor its current status. To characterize the density of mangrove trees better in Panay Island, surveys were undertaken within the coastal and riverine estuaries in the 11 municipalities of the province of Antique. Detailed records were taken by transect and ocular surveys along 40 barangays with 75 transects and 223 plots established. The mangroves of Antique were composed of 31 species of true mangroves belonging to 14 families and a total of 16 generas. Considerable values in terms of relative density and stems per hectare were found with Nypa fruticans as the highest, with a relative density of 70.372% trees per hectare and an average stem density of 4,457.249 stems/ha. Other significant species included Sonneratia alba (4.534%; 625 stems/ha), Avicennia marina (4.524%; 1,525 stems/ha), and Rhizophora apiculata (4.232%; 50 stems/ha). Close examination of the data suggested the variability of distribution patterns and density to be attributable to the differing responses of individual species to the environmental factors and other human activities. It was also concluded that habitat classification and topography could directly affect mangrove distribution and also capable of altering basic zonation patterns.Item Changes in prop roots and Pneumatophores of selected oiled mangrove trees in selected areas of TINMAR, Nueva Valencia, GuimarasAlvarez, Maria Francesca D. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2009-05)On August 11, 2006, the oil tanker M/T Solar I, carrying more than two million liters of bunker fuel, sank at the Guimaras Strait off the coast of the Guimaras and Negros Occidental provinces, causing some 500,000 liters of oil to pour into the strait. This resulted to the oiling of surrounding marine habitats including the mangroves in Taklong Island National Marine Reserve (TINMAR). The present paper reports on the monthly monitoring of changes exhibited by the prop roots and pneumatophores of four mangrove species, Rhizophora mucronata, Rhizophora apiculata, Rhizophora stylosa, and Sonneratia alba, in selected oiled and unoiled areas of TINMAR due to the oil spill. This study aimed to analyze changes in the physical appearance or abnormalities obtained by mangrove aerial root structures affected by the oil spill and the survival rate and different stress responses of prop roots and pneumatophores after an oil spill covering a six month period which started August 2007 until February 2008. Specifically, the number of prop roots and pneumatophores, adventitious aerial roots, abnormal branching of prop root tips, fissuring or pealing of periderm, death of prop root tips, twisted or curling of pneumatophores, adventitious pneumatophores, and abnormal pneumatophores. Changes in the said parameters may indicate stress caused by oil. Generally, the oiled mangroves showed a higher percentage of changes in terms of the number of adventitious, abnormal branching and dead prop root tips as compared to the unoiled control site which exhibited a very small or no change in the growth of prop roots. Fissuring of periderm for both Rhizophora stylosa and Rhizophora mucronata was observed only in the oiled sites. There was a minimal difference in the percentage of abnormal, adventitious, and twisting or curling of pneumatophores in oiled and unoiled sites whereas a higher percentage was exhibited in Taklong oiled site. The physical and morphological changes exhibited by the prop roots and pneumatophores as a result of a mangrove’s adaptive mechanism due to stress caused by oil are useful indicators for long term monitoring.Item Physico-chemical analysis and assessment of river waters discharged by sugar milling companies in Negros OccidentalAlger, Niña Xiamima A.; Arinzol, Shaira S.; Bobon, Steve Paolo P.; Daquilanea, Mikkaela C.; de Leon, Sarah C.; Hilado, Paolo C.; Lastica, Ariel C.; Manderico, Regine Viel D. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2010-03)This cross-sectional study was focused on the river waters discharged by six sugar milling companies in Negros Occidental. These companies utilize river water in order to operate and may alter the characteristics of the waters. This study aims to analyze and assess the physical characteristics, namely pH, oil and grease, temperature, salinity, turbidity, and color, and the chemical characteristics, namely biological oxygen demand (BOD), dissolved oxygen (DO), ammonia, phosphorus, and lead content, of these waters in order to identify the alterations upon its usage, detect abnormal characteristics, and eventually determine possible environmental and health hazards. Three samplings were done for each river’s downstream and upstream portions. The following tests and instruments were performed and were used on the samples: pH Meter for pH, DO Meter for DO, Wrinkler’s Test for BOD, PE Ascorbic Acid Test for phosphorus, Spectrophotometry for turbidity, Phenate Test for Ammonia, Hand Refractometer for salinity, Visual Comparison for color, Digital Thermometer for temperature, Flame Atomic Absorption Spectrophotometry for lead content, and Petroleum Ether Extraction Method for oil and grease. It was discovered most of the discharged river waters apparently had decreased pH and DO and increased BOD, temperature, salinity, ammonia, phosphorus, turbidity, and oil and grease content. Lead was detected on the all of the downstream portions. The pH and DO of most of the discharged river waters were ostensibly below the acceptable values while the oil and grease, ammonia, phosphorus, salinity, and lead content were above the acceptable ones. Temperature, color, and turbidity were the only parameters which fell within the acceptable values. Therefore, there can seemingly be environmental and health hazards posed on the residents living downstream since they are having direct or indirect contact with the contaminated or polluted water. It is recommended that laws should be made with regards to how the residents use the water and that the implementation of existing laws should be strengthened. Lastly, it is strongly advised that the DENR should increase the number of parameters analyzed during their regular monitoring, that the SMCs should improve the treatment of the waters, and that the effects of farmlands and communities on the river should be identified.Item Temperature tolerance of adult seahorse Hippocampus barbouriAraneta, Aira Joy T. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2010-03)Two experiments were carried out to determine the temperatures that could be tolerated by the adult seahorse Hippocampus barbouri (1 year and 4 months old). The low temperature levels tested were 16, 19, and 22 °C. The high temperature levels tested were 32, 35, and 38 °C. Ambient water temperature of 25-28°C served as the control. Seahorses were acclimatized for one hour prior to transfer to various experimental temperatures. The experiment was conducted in 10 L plastic containers with 10 seahorses per container. The experimental containers were floated in a 1 tonne fiber glass tank filled with 18cm of water, which served as water bath, to maintain the desired water temperature inside the containers. There were three replicates per treatment. Survival of the seahorses was monitored every hour for 96 hours. For the low-temperature tolerance experiment, only 57% survival was observed after 96 hours of exposure to 16°C, while 100% survival was obtained on seahorses reared in 19 and 22°C. Significantly decreasing percentage survival correlated closely with decreasing temperature. For the high-temperature tolerance experiment, H. barbouri tolerated a temperature of 32°C with 100% survival. However, no seahorse survived water temperatures of 35°C. Similarly all seahorses succumbed within an hour of exposure to water with a temperature of 38°C. No death occurred in seahorses at a temperature of 25-28°C (control). The results of the present study show that adult H. barbouri could tolerate temperatures as low as 16°C and as high as 32 °C.Item Microbiological water analysis of selected point sources in Iloilo CityAlama, Jannie Mae G.; Calitis, Ma. Socorro Fatima P.; Cervantes, Ria Angela E.; Garcia, Marian Aisa C.; Otico, Pelita A.; Pacheco, Donna Ginn G.; Taquiso, Jezreel l. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2006-04)The recreational use of the Iloilo River according to the Iloilo River Master Plan entails various studies to support it being safe for swimming and other activities. The Department of Environment and Natural Resources (DENR) Region VI has done very few studies to determine this particular aspect of the Iloilo River. Thus, the present study was conducted to determine the bacteriologic content of water in selected point sources in Iloilo River, Iloilo City and the possible correlations to the incidence of health risks. Specifically the study aims to: (1) determine significant differences in the physico-chemical characteristics of water samples from each point source; (2) to determine the total and fecal coliform counts number for each water sample from the selected point sources; (2) detect the presence or absence of E. coli, Salmonella spp., and culturable Vibrios in water in selected point sources; (3) describe the incidence of health risks; and (4) correlate the heterotrophic plate count for total coliforms, Most Probable Number for Fecal Coliforms and the number of symptomatic respondents. The results of the study showed that the total coliform count for Point source A (HPC=6000/l00 ml) is higher compared to the standard set by the DENR (5000/100 ml) while Point source B and C are within the range. The concentrations of E. coli, in water samples A, B, and C (2400 MPN/100 ml sample) were found to be higher than the DENR standard for fecal coliforms for Class C Waters - fresh water, (200 MPN/lOOml sample). Although results indicate that the river water has high fecal contamination, there were no significant correlations between heterotrophic plate counts, Most Probable Number for Fecal Coliforms and the number of symptomatic respondents for each point source.Item Antibiotic resistance patterns of selected pathogenic bacteria isolated from water and bottom sediments in the Iloilo tidal inlet (Iloilo River)Agustin, Eda Mae S.; Cabrias, Ligaya April May S.; Fuentebella, Elaine Joyce V.; Gestuveo, Rommel J.; Lagon, Raymond Anthonn Kriztee J.; Saldajeno, Cypruz Anne L.; Tunguia, Saer Martin J.; Villanueva, Regene Patricia Natividad V. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2010-03)In recent years, antibiotic resistance of pathogenic bacteria has become a public health concern. Although little is known of its environmental implications the presence of both potentially pathogenic bacteria and fecal coliform in rivers and other bodies of water raises the question of whether resistance transfer may actually occur in bodies of water. In relation, the Iloilo River for one has experienced changes in both ecological and sanitary conditions. With this threatening problem of both ecological and fecal pollution, the river could harbor microflora that could be of public health concern. Using the Kirby-Bauer Method, this study generally aims to determine the antibiotic resistance of pathogenic bacteria isolates (E. coli, S. typhi and V. cholerae) from water and bottom sediment samples from selected sampling areas in Iloilo River, Iloilo City. Stock cultures of bacterial isolates were obtained from the UPV-National Institute of Molecular Biology and Biotechnology (UPV-NIMBB) and were subjected to antibiotic resistance analysis using 12 different antibiotic classes. Results showed varying degrees of resistance in all of the sampling sites and species. Most isolates were highly resistant to penicillin and oxacillin and least resistant to ciprofloxacin. Multidrug-resistant isolates were also observed in all of the sampling sites and species. More isolates from bottom sediments were observed to be highly resistant than the isolates from water samples. Pearson correlation revealed that the antibiotic resistance patterns among the different species isolated from the different sources and sampling sites appeared to vary in a systematic manner indicative of a similar mechanism of antibiotic resistance development.Item Species composition and distribution of fish larvae in Lianga Bay, Surigao del SurAcabado, Cristy S. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2007-03)The species composition and distribution of ichthyoplankton in Lianga Bay, Surigao del Sur was investigated in June 2004. A total of 37 families were recorded from horizontal tows collected in 32 sampling stations. The most dominant larvae were Gobiidae and Pomacentridae, which comprised 20.4% and 16.0% of all larvae sampled, respectively. Overall larval density was 4.2 ind. 100 m-3 (n=32; sd=5.0), with highest concentrations in the inner portion of the bay particularly in the west and southwest portions. On the other hand, egg density (mean=0.9 eggs m-3; n=32; sd=0.9) showed highest concentration near the coastline but further from the central basal portion of the bay. Patches of high egg concentrations suggest that Lianga Bay may serve as spawning ground for some species.