2026 IJRSE – Volume 15 Issue 11
Available Online: 7 May 2026
Author/s:
Pasaba, Celine Diane M.*
Central Bicol State University of Agriculture – Pasacao Campus, Philippines (celinedianep@gmail.com)
Estrada, Danielle Justine DG.
Central Bicol State University of Agriculture – Pasacao Campus, Philippines (daniellejustineestrada@gmail.com)
Marina, Jonathan O.
Central Bicol State University of Agriculture – Pasacao Campus, Philippines (jonathanmarina836@gmail.com)
Felezmiño, Jasper Ian U.
Central Bicol State University of Agriculture – Pasacao Campus, Philippines (jasperian.felezmino@cbsua.edu.ph)
Nolasco, Michael N.
Central Bicol State University of Agriculture – Pasacao Campus, Philippines (michael.nolasco@cbsua.edu.ph)
Abstract:
This study evaluated carbon sequestration potential of roadside trees along the Maharlika Highway in Pasacao (8,411 m² area with 11 trees across 3 species: Macaranga grandifolia or Takip-asin, Artocarpus blancoi or Antipolo, and Mangifera indica or Mangga) and Pamplona (48,313 m² with 41 trees across 5 species, dominated by Samanea saman or Rain tree and Macaranga tanarius or Binunga) in Camarines Sur, Philippines. Despite heavy vehicle emissions, these trees absorb CO₂ through photosynthesis, storing about half in long-term biomass like trunks, branches, leaves, and roots. Researchers applied purposive sampling, October-November 2025 field surveys, DENR identification guides, DBH measurements at breast height, tree height data, and allometric equations to calculate above- and below-ground carbon stocks for the 11 species total. Rain tree led with 12.22 tonnes of carbon per tree in Pamplona, thanks to its large DBH, height, and wood density, far outpacing others. Takip-asin ranked second at 0.044 tonnes per tree in Pasacao, thriving as a fast-growing pioneer adapted to traffic-compacted soils with expansive leaves. Binunga, Mangga, and Antipolo showed modest 0.01-0.04 tonnes per tree, indicating compaction-limited baselines but strong scaling potential via native species. Beyond carbon storage, these trees curb soil erosion, bolster wildlife habitats (e.g., Narra and Balete), hold cultural value in Filipino lore, and support UN SDGs 13 (climate action) and 15 (life on land). Findings inform optimal species selection, mature tree preservation, and highway restoration to exemplify CO₂ reduction amid regional deforestation.
Keywords: carbon sequestration, assessment of trees species, Pasacao – Pamplona Highway
DOI: https://doi.org/10.5861/ijrse.2026.26160
Cite this article:
Pasaba, C. D. M., Estrada, D. J. D., Marina, J. O., Felezmiño, J. I. U., & Nolasco, M. N. (2026). Carbon Sequestration: Assessment of trees species along the Pasacao – Pamplona Highway. International Journal of Research Studies in Education, 15(11), 61-70. https://doi.org/10.5861/ijrse.2026.26160
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