Despite exponential increase in global blue carbon studies over the last decade, critical knowledge gaps remain regarding the role of drivers such as seascape connectivity that mediate the carbon storage in tropical saltmarsh ecosystems. The present study addresses this knowledge gap by investigating how seascape-level drivers, specifically connectivity between ecosystems, sediment traits and plant biomass, influence carbon stocks, in connected versus individual tropical saltmarsh (Porteresia coarctata and Myrostachia wightiana) meadows. This study compared the influence of connected saltmarsh meadows (adjacent to mangroves) with individual saltmarsh meadows across four tropical locations and assessed their carbon (C) and nitrogen (N) content in sediment, biomass, various plant traits and C stocks. Stable isotopes tracers (