Authors

Janny A. Sumilla

Author

Edgar D. Castañares

Corresponding author

Garry C. Marapao

Co-author

Dave Nathanael S. Lamoste

Co-author

Nonillon M. Aspe

Corresponding author

Davao del Sur State College, College of Agriculture and Related Sciences, 8002 Digos City, Davao del Sur, Philippines
College of Environment and Life Sciences, Mindanao State University at Naawan, 9023 Naawan, Misamis Orienta, Philippines
Faculty of Forestry, University of Agriculture in Krakow, 31-425 Krakow, Poland

*Corresponding author: [email protected]

ABSTRACT

The Talabaan River Watershed in Naawan, Misamis Oriental, Philippines, provides essential ecosystem services, including water for domestic and agricultural use and habitat for diverse flora. Remaining patches of secondary forest and wooded land continue to support various plant species but face threats from deforestation and land conversion. To document the floral composition of the area, a field survey was conducted using stratified sampling and transect walk methods. A total of 101 plant species were recorded, representing 80 genera and 44 families across five sites along the Talabaan River. Moraceae was the most represented family, followed by Fabaceae, Dipterocarpaceae, and Lauraceae. Thirty-five endemic species were recorded, and 33 were classified as threatened. Species richness varied with elevation, with higher values recorded in upland areas— particularly on Mt. Malindawag— and lower richness observed in lowland areas, where anthropogenic activities are more prevalent. These findings highlight an ecological integrity gradient within the watershed, shaped by the topographic complexity and increasing anthropogenic pressures. These findings provide baseline information to support the development of appropriate interventions for the conservation and sustainable management of the watershed.