Marshes fresh water/salt

Fresh water aquatics or marine or salt marsh plants but if marine plants then not with flowers spicate and... 

Estuary Region of interaction between rivers and near-shore ocean waters, where tidal action and river flow mix fresh and salt water. Such areas include bays, mouths of rivers, salt marshes, and lagoons. These brackish water ecosystems shelter and feed marine life, birds, and wildlife. 

Sulfate reduction rates are also controlled by the availability of sulfate and carbon as an energy source. Salt and brackish marsh generally have more sulfate present as compared to the fresh marsh or swamp forest soils due to saline water containing sulfate. Significant sulfate reduction can occur when adequate organic or label carbon is available to support intense reduction or low sediment... 

The Bay environment includes many fresh, brackish and salt water marshes and tidal flats which cover an area of approximately 1,700 square kilometers. These marshes are present along both the Eastern and Western Shores of the Chesapeake Bay and constitute an important component of the Bay ecosystem, in part because they are highly reactive environments and may play an important role in removing pesticides before they reach the main estuary. If these removal processes result in the detoxification of contaminants, they might be considered for use in treating agricultural runoff. 

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