John Paul Pacyao

Three distinct sampling locations within Davao Occidental, namely Brgy. Sto. Rosario in Sta. Maria municipality, Sitio Tawang in Brgy. Buhangin, and Sitio Agdao in Brgy. Tubalan in Malita municipality were investigated to evaluate the survival of planted mangroves (Rhizophora sp.). The study revealed a notable discrepancy in survival rates among the sites, with Sitio Agdao exhibiting the highest survival with 97.58%, followed by Sto. Rosario (91.84%), and Sitio Tawang registering 70.46% survival rate. No significant variance was observed between survival rates in Sta. Maria and Malita. Findings indicated diverse causes of mangrove mortality, including strong waves during northeasterly winds impacting Sto. Rosario, flashfloods affecting Sitio Tawang, and the presence of epiphytes (specifically barnacles) in Sitio Agdao. Among the sites, Sitio Tawang exhibited significantly lowest survival rates compared to Sto.

The study was conducted in the mangrove rehabilitation sites of Malita, Davao Occidental, Philippines particularly Sitio Agdao of Brgy. Tubalan, Sitio Baybay of Brgy. Buhangin and Sitio Lahusan of Brgy. Fishing Village from October to December 2020. Preliminary stations were established: Station 1 in Sitio Agdao, Station 2 in Sitio Baybay and the Station 3 in Sitio Lahusan. These sites are considered to be a slightly undisturbed mangrove forest dominated by species of mangrove trees. The free exploration method was carried out first before the conduct of the study. Samples consisted of host plants and their associates (epiphytes) are collected for proper identification. Three study areas were assessed by the number of individual species to calculate their relative abundance and density. A total of 7 species identified individually among of the three-study areas. The study also shows that species of mangrove epiphytes in the study area composed of 3 to 5 species per station and exhib...

This study was conducted to determine the secondary production of mangrove under PNAP Area of Brgy. Bagumbayan, Malalag, Davao del Sur. There were two sampling stations established in the area. In each station contains 3 transect lines with an interval of 50m and within the transect line a 10x10m plot was established. Quadrat method was also employed. Result revealed that there were 15 species of secondary productivity found in the area which composes of 613 individuals and was classified and identified according its taxonomic classification. Majority of this species commonly belongs to the Phylum Arthropoda, Molluska, Echinodermata and Chordata. The PNAP mangrove species were composed of Rhizophora mucronata, Avicennia marina and Sonneratia alba wherein the identified species used mangroves as habitat, nursery and breeding grounds. The result further showed that there was no significant difference between the species diversity and abundance of mangrove secondary productivity in PNAP mangrove area (P<0.05).

The present study determined and evaluated the anthropogenic activities of the local settlers living near Philippine National Aquasilviculture Program (PNAP) - Mangrove Rehabilitation Areas in the 4 selected Coastal Barangays of Davao Occidental namely Brgy. Tubalan, Brgy. Buhangin, Brgy. Sto. Rosario and Brgy. Tanglad. A self- structured survey questionnaire was formulated to know the perception of the local settlers on the issue concerning anthropogenic activities on the mangrove ecosystem near the PNAP areas. Gathered data include socio-demographic profile, issues and concerns, and perception including the activities of the local settlers lived near the area. A purposive sampling technique was done during data gathering. Results revealed that majority of the respondents are male, married and in the age ranges from 30 – 40 years old. These respondents confirmed that majority of the local settlers living near PNAP areas were converting the mangrove area into residential (90.38%), c...