Nitrogen input weakens the control of inundation frequency on soil organic carbon loss in a tidal salt marsh

摘要: Abstract The soil carbon (C) sequestration capacity of salt marshes is considerable importance with respect to the mitigatiing potentially detrimental consequences global climate change. Given that tidal are subjected periodic cycles inundation, it assumed C cycle in these expected be controlled varing extent by changes moisture and salinity induced alternating patterns drying rewetting. In addition, increases severity nitrogen (N) eutrophication becomes serious, we predicted organic (SOC) loss likely highly responsive increased N loading. this study, conducted a two-factor mesocosm experiment (simulated inundation input marsh) determine interactive effects frequency on CO2 CH4 emissions dissolved (DOC) contents. Our results showed led lower levels emission but greater emission, whereas weakened emissions. Moreover, was found modify response variations moisture. We also observed an enhancement DOC increasing frequency, surface considerably than subsurface soil. Further, as increased, detected relationship between CH4. findings highlighted vertical variation key factor controlling SOC marshes, although can weaken control.