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Undergraduate Special Problem

Permanent URI for this collectionhttps://hdl.handle.net/20.500.14583/30

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Committee Chair: search.filters.chair.Nievales, Marie Frances J.SDG: search.filters.sdg.SDG 15 - Life on land

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    Phytosociological study in Garantiangan Island, Taklong Island National Marine Reserve (TINMR), Nueva Valencia, Guimaras, Philippines
    Calesterio, Krizha Marie C. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2018-12)
    Each island has a unique set of characteristics attributed to differences in size, isolation, relief and climate, and origin. Such characteristic influence their floristic composition. Rapid development of tropical islands due to expansion of tourism thus put the flora under risks. In addition, the impact of climate change is also a big factor. There is a need to do baseline studies for proper management and conservation purposes. This study was conducted in Garantiangan Island (a part of Taklong Island National Marine Reserve) in Nueva Valencia, Guimaras, Philippines to assess the species composition, and community structure of flora present. Data were collected by establishing random plots from August 2016 to February 2017. Results showed a total of 45 species (7 unidentified) belonging to 26 families, were recorded. Rubiaceae was the most dominant family, having five representative species. Invasive species found were Leucaena leucocephala, and Lantana camara. Floras found belonged to two types of vegetation namely; littoral vegetation: herbaceous strand, littoral shrubland and littoral forest zone and mangrove vegetation. Total stand basal area was 16.63 m2 ha- 1 , with 4985.71 stems ha-1. The total seedling density (1943 individuals ha- 1) > total sapling density (1686 individuals ha- 1) > total tree density (1343 individuals ha- 1) suggests “good” regeneration status. 1. Tarenna littoralis had the highest relative density (18.05%) and frequency (8 %). Terminalia foetidissima had the highest relative dominance (26.70%) and was the most important species (37.04 %). Shannon-Weiner diversity index and Simpson evenness index values recorded were 1.33 and 0.89, respectively, which suggests low diversity and evenness in the island. Given that the biodiversity in the island is threatened, though the results are preliminary and full floral surveys were not carried out, data gathered can serve as a basis for conservation and management actions.
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    Community structure of holothuroids in selected seagrass beds in Taklong Island National Marine Reserve, Guimaras, Philippines
    Calaguing, Aldwyn C. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2018-06)
    Sea cucumbers are beneficial to mankind commercially as food and medicinal commodity. Overexploitation and illegal catch of these organisms even within Marine Protected Areas (MPAs) caused stock depleting and even local extinction of some populations in the country. Monitoring and regular assessment of their population is a must for their proper management and protection. This study investigated the status of holothuroid community within 4 selected seagrass meadows in Taklong Island National Marine Reserve (TINMR), Nueva Valencia, Guimaras. Holothuroid composition and estimates of density, frequency and distribution were determined through plot method. Species identification was based on gross morphology and spicule analysis. There were 40 individuals collected identified as 5 species, namely, Holothuria atra (n = 18), Holothuria pulla (n = 1), Holothuria scabra (n = 5), Bohadschia vitiensis (n = 2) and Synapta maculata (n = 13). The first 4 belonged to Order Aspidochirotida and the last belonged to Order Apodida. Their distribution and community structure in TINMR are likely influenced by the physical and chemical environment, seagrass community poaching, and cryptic behavior.
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    Phytosociological study of Isla Patay Moro in Taklong Island National Marine Reserve, Nueva Valencia, Guimaras, Philippines
    Bela-ong, Andrea Lucyle (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2017-06)
    Small islands may contain unique plant composition compared with larger islands due to size, isolation and exposure. Unfortunately, information on small island flora in the tropics is limited considering that these islands are now subjected to impacts of climate change and increased anthropogenic pressure. In addition, these islands are also subjected to invasion of non-native species that may alter the overall ecology of the islands. There is lack of basic information on what constitute a typical flora of small islands. Thus, a phytosociological study was conducted in Isla Patay Moro, one of the many small islands within Taklong Island National Marine Reserve, Nueva Valencia, Guimaras, Philippines from December 2016 to April 2017 in an attempt to provide relevant information. Specifically, it described, identified and classified the flora present in the islands as well as described the community structure in terms of species composition, stand height, stand basal area, importance value and species diversity and evenness. The flora of the island is dominated by trees and shrubs and a few vines. A total of 30 species were identified representing 19 families. The most common and dominant species was Streblus asper with an importance value of 57.80. The total sampled area of the islands was 600 m2 and the total stand basal cover of 20,450.17m2/ha. The species diversity of the islands was 1.17 and 0.87 by Shannon and Simpson diversity indices, respectively, implying low species diversity. The stand height of the flora ranged from 2.2 to 8.47 meters. Presence of exotic species, Lantana camara, Leucaena leucocephla were also found. This study may serve as a baseline for further researches and the results may aid in the development of floristic conservation activities particularly for the presence of invasive or non-native species that may alter the natural flora in the future leading to ecological instability of the island. This is the first systematic survey of higher vascular plants on the island.