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Study of Fiddler Crab Density on Soil Properties and Carbon Sequestration in Mangrove Soils, Ban Modtanoi, Kantang District, Trang Province.
Organization(s):Princess Chulabhorn Science High School Trang
Country:Thailand
Student(s):Ms. Natthawanee Chuhoithong
Ms. Waratchaya Kwannimit
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Member(s):SIRIKWAN NUPHUTI, Neungruthai Chaimanee
Contributors:
Report Type(s):Virtual Science Symposium Report
Protocols:Soil Characterization, Soil pH, Soil Temperature, Soil Fertility, Soil Moisture - Gravimetric
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Language(s):English
Date Submitted:2026-01-30
This study on the effects of fiddler crab density on soil properties and carbon sequestration in mangrove soils was conducted in Ban Modtanoi mangrove forest, Kantang District, Trang Province. The objectives of the study were to examine the effects of fiddler crab density on soil properties and to compare the amount of carbon sequestration in mangrove soils at Ban Modtanoi, Kantang District, Trang Province. The GLOBE Soil Protocol was employed to analyze the physical and chemical properties of the soil, and soil organic carbon (%OC) was calculated from the loss on ignition (%LOI) at a combustion temperature of 450°C. The results showed that areas with higher fiddler crab density exhibited significantly greater carbon sequestration capacity. Site B (the pier area), which had a fiddler crab density of 80 individuals per square meter, showed a high soil organic carbon content of 2.65 %OC and an organic matter content of 6.92 %LOI. In contrast, Site A (the community enterprise area), with a lower crab density of 44.8 individuals per square meter, exhibited lower values, with 1.54 %OC and 4.36 %LOI. In addition, Site B had higher soil moisture (22.85%) and a clay loam soil texture, whereas Site A had lower soil moisture (17.28%) and a sandy clay loam texture. Both sites had a soil pH of 6 and contained only trace amounts of N, P, and K nutrients.