Abstract. Villanueva ELC, Obeña RDR, Origenes MG, Buot IE Jr. 2022. Vegetation structure of forests over limestone and its influencing environmental factors in Samar Island Natural Park, Philippines. Biodiversitas 23: 6492-6512. National Park (SINP) limestone, a nominee to the UNESCO World Heritage List, needs comprehensive study vegetation as baseline for monitoring effective conservation. Thu...