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Applied and Environmental Soil Science
Volume 2017, Article ID 4010381, 9 pages
https://doi.org/10.1155/2017/4010381
Research Article

Spatial Variability and Relationship of Mangrove Soil Organic Matter to Organic Carbon

1Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
2Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand

Correspondence should be addressed to Pasicha Chaikaew; ht.ca.aluhc@c.ahcisap

Received 11 June 2016; Revised 3 November 2016; Accepted 29 November 2016; Published 29 January 2017

Academic Editor: Teodoro M. Miano

Copyright © 2017 Pasicha Chaikaew and Suchana Chavanich. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Degradation and destruction of mangrove forests in many regions have resulted in the alteration of carbon cycling. Objectives of this study were established to answer the question regarding how much soil organic carbon (SOC) is stored in wetland soils in part of the upper northeastern Gulf of Thailand and to what extent SOC is related to organic matter (OM). A total of 29 soil samples were collected in October 2015. Soil physiochemical analyses followed the standard protocol. Spatial distributions were estimated by a kriging method. Linear regression and coefficient were used to determine the suitable conversion factor for mangrove soils. The results showed that surface soil (0–5 cm) contained higher SOC content as compared to subsurface soil (5–10 cm). Considering a depth of 10 cm, this area had a high potential to sequester carbon with a mean ± standard deviation of %. The spatial variability of OM and SOC revealed that organic matter and carbon decreased with the distance from upstream areas toward the gulf. Based on the assumption that OM is 50% SOC, the conversion factor of 2 is recommended for more accuracy rather than the conventional factor of 1.724.