UPV Digital RepositoryUPV-DRUniversity of the Philippines Visayas
 

Undergraduate Theses

Permanent URI for this collectionhttps://hdl.handle.net/20.500.14583/13

Browse

Filters

2018 - 20192

Settings

AGROVOC Keyword: search.filters.agrovoc.species diversityKeyword: search.filters.keyword.Community structure

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Community structure of superfamily trochoidea (Mollusca Gastropoda) in coral reef sites in Taklong Island National Marine Reserve, Guimaras
    Cagampang, Ma. Thrysky Kharmylle A. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2018-06)
    Mollusks are considered to be one of the most diverse animal groups. These are widely distributed in tropical areas such as the Philippines. One of the most diverse classes of Phylum Mollusca is Class Gastropoda. It is comprised of more than 65, 000 species. Superfamily Trochoidea is considered to be its largest superfamily with more than 2000 species. Guimaras is a province here in the Philippines. There are a variety of islands that can be found in Guimaras. One of this is Taklong Island located in the municipality of Nueva Valencia. This study describes the community structure of Superfamily Trochoidea in three selected reef flat sampling sites namely, Talisay, Kalirohan, and Banago in Taklong Island National Marine Reserve (TINMR). Plot metlrod was used in this study. There was a total of 369 gastropod individuals collected but only 242 were alive. Live samples belonged to 12 families including 2 families of Super Family Trochoidea, namely, Trochidae and Turbinidae. There were 8 species identified that belonged to these 2 families of Superfamily Trochidea. Under family Trochidae, was 1 species, Tectus fenestratus; under family Turbinidae were three species, namely, Astralium calcar, Astralium provisorium and Turbo argyrostomus. Dead species of Family Trochidae include Trochus conus, Trochus hanleyanus, Trochus sp. and Trochus maculatus. In general, Astralium calcar was found to be the most abundant among all live species. The low diversity of trochoids reported in this study could be an underestimate due to sampling design. Most species of Superfamily Trochoidea, especially the topshells, are nocturnal while this study was conducted at daytime. In general, the gastropod community in TINMR proved to be rich and diverse.
  • Thumbnail Image
    Item
    Community structure of beach forest species in Mag-aba, Pandan, Antique
    Banogon, Tharrah Anne O. (Division of Biological Sciences, College of Arts and Sciences, University of the Philippines Visayas, 2019-06)
    The Philippine beach forest is one of the understudied and less-popular important ecosystem that provides great number of food and economic products in the country. In fact, we lost them much earlier than the mangrove community that there is miniscule information is existing about them. There is a need for understanding the forest status and community structure due to the rising threats of natural and anthropogenic factors. The unexplored forest patch in Barangay Mag-aba, Pandan, Antique can provide additional information on beach forest diversity and abundance in the country, thus the need for this study. This study aimed to record the different species and to provide description of the community of beach forest in Mag-aba, Pandan. Specifically, the objectives of this study are (1) identify, describe and classify the beach forest species present in the area, and (2) describe the community structure in terms of species composition, diameter at breast height and stand height, stand basal area, importance value, evenness and Shannon- Weiner Index of Diversity. The transect plot method adopted from English et al (1994) was used to obtained quantitative data. A total of 80 beach forest species representing 41 families were recorded. The family Fabaceae and the species Cocos nucifera dominated the forest community. The stand basal area of 83.24 m2 ha-1 reflects a mature beach forest community, however the community is made up of mostly low DBH classes (saplings and seedling) also indicating a regenerating forest. Mag-aba is characterized to have a low species diversity (H'=1.17), however the individual species are fairly distributed (J'- 0.83). These results are addition to the existing knowledge of beach forest community that would serve as information for conservation measures.