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Species diversity and Chlorophyll content of green algae in the selected intertidal area of Malita, Davao Occidental, Philippines

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Author Affiliations

  • 1Science Education Program, Institute of Teacher Education and Information Technology (ITEIT), Southern Philippine Agribusiness and Marine and Aquatic School of Technology, Poblacion Malita Davao Occidental, Philippines
  • 2Science Education Program, Institute of Teacher Education and Information Technology (ITEIT), Southern Philippine Agribusiness and Marine and Aquatic School of Technology, Poblacion Malita Davao Occidental, Philippines
  • 3Department of Marine Biology, Institute of Teacher Education Program, Southern Philippine Agribusiness and Marine and Aquatic School of Technology, Poblacion Malita Davao Occidental, Philippines

Res. J. Marine Sci., Volume 13, Issue (1), Pages 9-14, June,13 (2025)

Abstract

The study aimed to determine the species diversity and chlorophyll content of green algae in selected sites in Malita, Davao Occidental, namely Sitio Alibungog, Sitio Bagumbayan, and Sitio Agdao in Tubalan, Malita Davao Philippines. The three selected sites were designated as three stations. Each site had 3 transect lines (9 transect lines). The transect quadrat method was used to establish the study areas, while the chlorophyll determination content of the green algae was done using a spectrophotometric method. There were (7) seven green algae species found in the three selected sites, namely Halimeda opuntia, Halimeda discoidea, Codium fragile, Ulva compressa, Caulerpa lentillifera, Caulerpa racemosa, and Dictyosphaeria cavernosa. The result also showed that Station 2 gained the highest Index of diversity, while in terms of relative abundance, Caulerpa lentillifera obtained the highest abundance in Station 1, Halimeda opuntia obtained the highest abundance in Station 2, and Caulerpa lentillifera obtained the highest abundance in Station 3. The result showed that the temperature of each of the three stations ranged from 31-32°C, the pH level was 7, and the salinity ranged from 31-32 ppt. Regarding chlorophyll determination content, Dictyosphearia cavernosa, Caulerpa lentillefera, and Caulerpa racemosa contain the highest value in chlorophyll. Then, Ulva Compressa contains the lowest value of total chlorophyll content.

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