Impact of freshwater river reconnection on porewater salinity and ammonium availability in coastal brackish marsh soils.

Restoring freshwater flows to wetland ecosystems is an increasingly common tool for reversing saltwater intrusion/chronic salinization. Hydrologic restoration projects can deliver large volumes of sediment and fresh water to coastal basins, episodically exposing brackish and salt marsh vegetated soils to low surface water salinities. Yet little is known about the impacts of river reconnection/diversions to porewater salinity of the active root zone (0-30 cm) and salinity dependent soil biogeochemical processes like sorption.