Vegetation A nalysis of a F our Y ear O ld L andslide S car in Poblacion Central, Atok, Benguet Province, Philippines

The Municipality of Atok in Benguet Province, Philippines is a landslide prone area due to its mountainous topography, occurrence of earthquak e and heavy rainfalls brought by monsoon rains and typhoons, and human activities such as excavations and road construction. In the past years, massive landslides washed off vegetation cover of several areas in Atok, leaving these barren. Several of these landslide scars were left untouched, and eventually, revegetated by recolonizing species. In this study, we conducted vegetation analysis of a four - year - old landslide scar in Poblacion Central, Atok, Benguet Province, Philippines. The vegetation analysis w as performed within the landslide scar and the adjacent uneroded area, using line transects and quadrats, to determine the frequency and cover of the recolonizing species . The most dominant species was determined from the importance values computed from th e relative frequency and relative cover. There were 19 species identified in the landslide scar. The dominant species are the Campylopus sp. , Paspalum longifolium and Eupatorium adenophorum with importance values of 30.365%, 22.597% and 11.704% respectivel y. Comparatively, there were 21 species identified in the adjacent uneroded area, of which the dominant species are Paspalum distichum , Pteridium aquilinum , and Paspalum longifolium with importance values of 25.461%, 13.050% , and 12.105% respectively. T his study was conducted to document the recolonizing plant species in the landslide scar that can be used as revegetation species in other landslides .

Author(s): Freda M. Wong, Kryssa D. Balangcod, Teodora D. Balangcod

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