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    Floristic composition and diversity of mangroves in selected sites in the province of Antique, Panay Island, Philippines.
    Balinas, Lucelle V. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2006-03)
    Mangroves in the Philippines are in constant danger due to innumerable disturbances in the environment. The study endeavored to assess the floristic composition and diversity of the mangroves in the province of Antique through transect and ocular survey in the randomly selected sites throughout the province. Diversity in the region is high with the presence of 3 1 true mangrove species represented by 16 families and 14 genera. The species include Acanthus ebracteatus, A. ilicifolius, and A. volubilis from Family Acanthaceae, Avicennia alba, A. marina. A. officinalis, and A. rhumphiana from Family Avicenniaceae, Camptostemon philippinensis from Family Bombaceae, Lumnitzera littorea and Lumnitzera racemosa from Family Combretaceae, Excoecaria agallocha from Family Euphorbiaceae, Pemphis acidula from Family Lythraceae, Xylocarpus granatum and Xylocarpus moluccensis from Family Meliaceae, Aegiceras corniculatum and Aegiceras floridum from Family Myrsinaceae, Osbornia octodonta of Family Myrtaceae, Nypa fruticans of Family Palmae, Bruguieria cvlindrica. B. gymnorrhiza, and B. sexangula, Ceriops decandra, C. tagal, Rhizophora apiculata. R. mucronata and R. stylosa from Family Rhizophoraceae, Scyphiphora hydrophvllaceae from Family Rubiaceae, Sonneratia alba, S. caseolaris and S. ovata from Family Sonneratiaceae, and Heritiera littoralis from Family Sterculiaceae . The Shannon Index of Diversity used to determine the measure of diversity in the area is correlated with Pielou's Equitability Index for Evenness. The measures of indices showed that diversity and evenness of the mangal area in the province are directly related, with values of 0.73232 and 0.51163, respectively. Caluya showed the highest diversity index of 1.0132, which consisted of 28 species from 13 families and 15 genera, while Bugasong has a relatively low diversity of 0.0486, denoted by 6 species from 4 families and 4 genera. In general, the high variations in the geomorphology of coastal areas in Antique provided a wide range of substrata for colonization of mangroves that contributed to the high species diversity.
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    Species composition , abundance and distribution of trees ina 4.3-hectare plot adjacent to the Mat-y gate of the University of the Philippines Visayas Main Campus,Miagao, Iloilo
    Alaban, Annaveve Rose M. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2013-04)
    A 4.3-hectare plot across the UPV tennis court extending to the Mat-y gate of the campus was the area of study. The local names of each tree were identified. The girth- at-breast-height (GBH) and approximate height of trees were also recorded. From the data gathered, the Basal Area, Index of Dominance and Index of Diversity were computed. One thousand one hundred forty-five trees were found in the 4.3-hectare plot comprised of fifteen species of trees commonly known as “Eucalyptus”, “Acacia”, “Kamonsil”, “Narra”, “Mahogany”, “Talisay”, “Payhod”, “Agho”, “Apyan”, “Gmelina”, “Ipil-ipil”, “Bugto-tae”, “Indian Tree”, “Lamnog” and “Tabong”. The value of the Index of Dominance is higher compared to the value of the Index of Diversity, which means that a species is exerting greater influence compared to other species. Eucalyptus is the most dominant tree species in the area of study which is 75.63% of the whole population. The distribution of trees in the 4.3-hectare plot is not random and is mainly influenced by human intervention since it is a secondary forest.