Factors Influencing Vegetation Structure in Forests over Lime-stone in Guiuan Marine Resource Protected Landscape and Sea-scape, Samar Island, Philippines
国际木文化学会 | 39 view(s) | 2023/05/25
报告嘉宾：Ren Divien R. Obeña
Forests over limestone provides numerous ecosystem services to surrounding communities. In Philippines, Samar Island is known to house vast area of forests over limestone. Aside from anthropogenic disturbances in the area that makes these resources vulnerable, pressures are exacerbated due to the frequent occurrence of typhoon in the island. Hence, it is crucial to understand the vegetation ecology of the area which may provide insights in formulating appropriate conservation strategies specific to this area. This study is implemented in one of the protected areas in Samar Island, the Guiuan Marine Resource Protected Landscape and Seascape. A total of nine (9) 20m x 20m plots were established to assess the tree species (≥1m tall). Plant abundance was recorded and computed. Soil samples were collected while climate data were obtained from the Guiuan, Eastern Samar Weather Stations. Classification analysis (cluster analysis) was done using the relative basal area of trees per plot to identify major plant communities. The canonical correspondence analysis was done to identify the environmental variables that influence the plant data set. Results show that GUI 02 plot was the most diverse, had highest in Simpson 1-D index and Fisher’s alpha, as well as highest in total number of tree species among all observed plots. The anthropogenic stresses in the area affect the species abundance in plots GUI 1 and GUI 8 plots. The results of cluster analysis shows that there three (3) vegetation clusters in the area. Canonical correspondence analysis identified that elevation and temperature as the major factors influencing the vegetation structure in GMRPLS. This study provides valuable information about the species composition and factors influencing the vegetation structure of the GMRPLS. findings of this study may serve as a baseline for developing effective conservation policies to sustainably managed protected area.