title: Mangroves as a major source of soil carbon storage in adjacent seagrass meadows.
abstract: Mangrove forests have the potential to export carbon to adjacent ecosystems but whether mangrove-derived organic carbon (OC) would enhance the soil OC storage in seagrass meadows adjacent to mangroves is unclear. In this study we examine the potential for the contribution of mangrove OC to seagrass soils on the coast of North Sulawesi, Indonesia. We found that seagrass meadows adjacent to mangroves had significantly higher soil OC concentrations, soil OC with lower δ13C, and lower bulk density than those at the non-mangrove adjacent meadows. Soil OC storage to 30 cm depth ranged from 3.21 to 6.82 kg C m-2, and was also significantly higher at the mangrove adjacent meadows than those non-adjacent meadows. δ13C analyses revealed that mangrove OC contributed 34 to 83% to soil OC at the mangrove adjacent meadows. The δ13C value of seagrass plants was also different between the seagrasses adjacent to mangroves and those which were not, with lower values measured at the seagrasses adjacent to mangroves. Moreover, we found significant spatial variation in both soil OC concentration and storage, with values decreasing toward sea, and the contribution of mangrove-derived carbon also reduced with distance from the forest.
authors.affiliation: Third Institute of Oceanography, State Oceanic Administration, Xiamen, Fujian, China.
authors.forename: Guangcheng
authors.initials: G
authors.lastname: Chen
authors.affiliation: Research Centre for Oceanography, Indonesian Institute of Sciences, Indonesia.
authors.forename: Muhammad Husni
authors.initials: MH
authors.lastname: Azkab
authors.affiliation: Department of Geography, McGill University, Montreal, Quebec, Canada.
authors.forename: Gail L
authors.initials: GL
authors.lastname: Chmura
authors.affiliation: Third Institute of Oceanography, State Oceanic Administration, Xiamen, Fujian, China.
authors.forename: Shunyang
authors.initials: S
authors.lastname: Chen
authors.affiliation: Research Centre for Oceanography, Indonesian Institute of Sciences, Indonesia.
authors.forename: Pramudji
authors.initials: P
authors.lastname: Sastrosuwondo
authors.affiliation: Third Institute of Oceanography, State Oceanic Administration, Xiamen, Fujian, China.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Ma
authors.affiliation: Research Centre for Oceanography, Indonesian Institute of Sciences, Indonesia.
authors.forename: I Wayan Eka
authors.initials: IW
authors.lastname: Dharmawan
authors.affiliation: Third Institute of Oceanography, State Oceanic Administration, Xiamen, Fujian, China.
authors.forename: Xijie
authors.initials: X
authors.lastname: Yin
authors.affiliation: Third Institute of Oceanography, State Oceanic Administration, Xiamen, Fujian, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
mesh_terms: D000704:Analysis of Variance; D002244:Carbon / Q000737:chemistry*; D057486:Carbon Cycle; D017753:Ecosystem; D065948:Grassland; D007214:Indonesia; D012987:Soil / Q000737:chemistry*; D053833:Wetlands
chemical_list: D012987:Soil; D002244:Carbon