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Determining the Density of Seagrass at Different Substrates

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Determining the Density of Seagrass at Different Substrates
INTRODUCTION
Background of the Study Seagrasses are the marine flowering plants. They are the only angiosperms that successfully grow in tidal and subtidal marine environment. Seagrasses belong to the families, Hydrocharitaceae and Potamogetonaceae and they are in no way related to the terrestrial grasses of Poaceae. There are 13 genera and 58 species available all over the world. Of these, six genera (Amphibolis, Heterozostera, Phyllospadix, Posidonia, Pseudalthenia and Zostera) are mostly restricted to temperate seas and the remaining seven genera (Cymodocea, Enhalus, Halodule, Halophila, Syringodium, Thalassia and Thalassodendron) are distributed in tropical seas (L. Kannan, T. Thangaradjou). They grow and reproduce sexually being continuously submerged under water. They do not require contact with air, and the reproductive cycle with flowering and pollination is completed under water. Seagrasses have a number of adaptations to the submerged life form (Borum et al, 2004). Thalassia hemprichii is common on mud-coral-sand or coarse coral-sand substrates, in sheltered habitats in the Philippines. The plant has been observed growing from the base and through fingers of corals at 6 m deep. T. hemprichii may be found mixed with Syringodium isoetifolium, Cymodocea serrulata, C. rotundata, Enhalus acoroides, Halophila ovalis, and Halodule uninervis (Calumpong et al, 1983).

Locale of the Study This was conducted at Brgy. San Pedro, Panabo City.

Delimination of the Study This study was concerned in determining the density of seagrass specifically Thalassia hemprichii at different substrate at Brgy. San Pedro, Panabo City.

Objectives In this study, the objective is to determine the present status of Thalassia hemprichii in coastal area at Brgy. San Pedro, Panabo City. This study specifically aims to: 1. Determine the population density of Thalassia hemprichii in the area; 2. Compare the density of Thalassia hemprichii among the three(3)

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