Origenes and Lapitan, 2021 DOI: 10.18801/ijfee.030121.11 100 Published with open access at journalbinet.com. EISSN: 2708-54302, © 2021 The Authors, Research paper. Carbon stock assessment through above-ground biomass of trees at different forest composition in Mt. Malindawag, Lubilan, Naawan, Misamis Oriental, Philippines Marne G. Origenes 1 and Renato L. Lapitan 2* 1 Graduate School, University of the Philippines, Los Banos, Philippines. Email: mgorigenes@up.edu.ph 2 Institute of Renewable Natural Resources, College of Forestry and Natural Resources, University of the Philippines, Los Banos, Philippines. *Corresponding author: rllapitan@up.edu.ph (Laptain, RL); Contact no: +639276175759 Article received: 14.11.20; Revised: 09.12.20; First published online: 15 January 2021. ABSTRACT It is documented that the amounts of carbon stored and its level of degradation in different forests compositions and different types of forest is mostly unknown, Philippines is no exemption as little was done in some places of this country. This study was conducted to assess carbon stock through above ground biomass of trees at different forest composition in Mt. Malindawag. There were three (3) 20m x 20m sample plots (quadrats) (400m 2 equivalent to 0.04 ha) established as replicate plots provided with 50m intervals. Forest composition such as the Agroforestry area, mixed forest area and the Plantation forest were assessed in terms of the number of individuals, number of species, diameter, and height to calculate the biomass, tree biomass density as well as the carbon stock. Based on the results of the study conducted in different forest compositions of Mt. Malindawag, plantation forest has the highest carbon stocking rate. However, these results were not significantly different from the other forest composition. This was associated with a higher accumulated diameter, which resulted in higher biomass and eventually carbon stock. Species found in this forest composition are productive and have lesser number of individuals; therefore, there is lesser competition for resources such as light. Such a mechanism might contribute to the higher biomass and carbon stock. However, the result may not be right to other areas due to uncontrollable factors, anthropogenic and environmental factors. Hence, it is recommended to have further studies on areas where trees have similar age, species diversity index as well as stand development and site productivity for a more accurate and quantifiable carbon stock. Key Words: Carbon storage, Forest composition, Agroforestry, Mixed forest, Plantation forest, Tree biomass and Species diversity index. Published with Open Access at Journal BiNET Vol. 03, Issue 01: 100-113 International Journal of Forestry, Ecology and Environment Journal Home: https://www.journalbinet.com/ijfee-journal.html Cite Article: Origenes, M. G. and Lapitan, R. L. (2021). Carbon stock assessment through above ground biomass of trees at different forest composition in Mt. Malindawag, Lubilan, Naawan, Misamis Oriental, Philippines. International Journal of Forestry, Ecology and Environment, 03(01), 100-113. Crossref: https://doi.org/10.18801/ijfee.030121.11 Article distributed under terms of a Creative Common Attribution 4.0 International License.