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Abstract
The first record of pteridophyte species from Columbio, Sultan Kudarat were documented from its four key areas and identified along with their conservation status. A 2-km transect line was established in each of the four key biodiversity conservation sites. Sixty-six (66) pteridophyte species belonging to seventeen (17) families were identified across all areas. Family Polypodiaceae was observed with the highest number of recorded species (16). Of the four sites surveyed, Bulol-lumot harbored the highest number of species (56). Additionally, seven species were listed as endemic to the Philippines: Diplazium sibuyanense (Copel.) Alderw., Polystichum elmeri Copel., Selliguea elmeri (Copel.) Ching, Lindsaea apoensis Copel., Lindsaea adiantodes J.Sm., Phlegmariurus delbrueckii (Herter) A.R.Field & Bostock, and Tectaria athyriosora M.G.Price. Moreover, one was noted as Other Threatened Species, Diplazium sibuyanense (Copel.) Alderw. Three species were categorized as vulnerable: Asplenium vittaeforme Cav., Drynaria aglaomorpha Christenh., and Drynaria heracleum (Kunze) T.Moore. Lastly, one endangered species was identified, Lepisorus platyrhynchos (Kunze) Li Wang. Similarity index showed that the species across all sites is 27.08% similar. Results of this study showed that selected biodiversity key areas in Columbio supported high pteridophyte diversity. Thus, implementation of conservation measures and local strategies in these areas should be strengthened given that species with conservation issues were recorded in these areas.
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