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Research Proposal: The Relationship Between Canopy Cover and Carbon Sequestration Potential in Phakmaiwittayanukul School
Organization(s):Phakmaiwittayanukul school
Country:Thailand
Student(s):Mr.Krittanop Wongpakdee
Mr.Thanakrit Ngeksoongnern
Mr.Peeraphat Keskul
Mr.Watcharapong Thongmaen
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Member(s):Darunee Samerpak, Suriya Yaowaman
Contributors:Mrs.Atchara Poung-ok
Report Type(s):Virtual Science Symposium Report
Protocols:Biometry (including Tree Height), Land Cover Classification, Green-Up / Green-Down
Presentation Poster:
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Language(s):English
Date Submitted:2026-01-30
The objective of this research was to compare the physical structure and carbon sequestration capacity between the Open Forest and Dense Forest at Phakmaiwittayanukul School, Sisaket. Conducted from December 2025 to January 2026 following GLOBE Protocols, the study utilized a Densiometer for canopy cover, the GLOBE Observer app for tree height, and Diameter at Breast Height (DBH) measurements. Data analysis followed the standards of the Thailand Greenhouse Gas Management Organization (TGO).
Results showed the Dense Forest had a higher canopy cover (51.56%) than the Open Forest (45.31%). Ground cover in the Dense Forest (40.63%) was exclusively green vegetation, while the Open Forest (48.44%) displayed higher diversity with both green vegetation and brown leaf litter. Crucially, the Open Forest demonstrated a higher carbon sequestration capacity (18,175.14 kgCO2eq) compared to the Dense Forest (13,960.31 kgCO2eq.).
The discussion concludes that carbon sequestration is primarily determined by individual tree biomass rather than canopy density. Large Sindora siamensis (Makha Tae) trees in the Open Forest provided higher biomass than the smaller, high-density trees in the Dense Forest. Thus, preserving existing mature trees alongside supplemental planting is recommended for effective, sustainable greenhouse gas reduction.