The role of mangrove fine root production and decomposition on soil organic carbon component ratios

• SEM showed how biotic and abiotic factors impact SOC components by path analysis. Vegetation biomass soil salinity affect impacting fine root production. explain 91.2% of production decomposition. The low-order roots 90.9% component ratio change. Production decomposition change across the sea-land gradient. Mangrove are an important contributor to organic matter (SOC), yet their accumulation gradient is still elusive. This study aimed investigate influencing dynamics on ratios involving particulate carbon (POC)/SOC, dissolved (DOC)/SOC, microbial carbon(MBC)/SOC. Based upon sequential coring litter bag method, production, mangrove were investigated. turnover rate increased from 90.9 g·m ?2 510.9 0.44 yr ?1 1.49 respectively. After one year decomposition, 69.5–80.8% 58.3–69.2% high-order remained, Decomposition rates both significantly slower in landward zone than seaward zones. Redundancy analysis (RDA) illustrated that vegetation respectively main affecting they explained Stepwise regression indicated was mainly influenced while negatively affected salinity. POC 20.13 t·ha 58.71 78.42 139.01 DOC/SOC MBC/SOC reduced 0.33 0.24 0.55 RDA results major control among roots, explaining changes. structural equation modeling, coefficient POC/SOC 0.914 (P < 0.001), indicating drive accumulation. Nevertheless, played a minor role information gained this will facilitate policy decisions concerning restoration forests China.