| Term | Definition |
| Substrate | A substance or layer that underlies something |
| Hydrophytes | A plant that grows only in water |
| Hydric | Containing plenty of moisture; very wet |
| Anaerobic | Relating to or involving something with oxygen |
| Organic | Made from living matter |
| Sulfer | The chemical element of an atomic number; makes up most gasses |
| Open Wetland | Flow of materials in and out of the system |
| Salinity | the relative proportion of salt in a solution |
| Estuary | the wide part of a river where it nears the sea |
| Hammock | a small island or mound covered by bushes or trees |
| Spartina | grass of freshwater swamps and salt marshes of Europe, Africa, America, and South Atlantic islands |
| HALOphytes | terrestrial plant adapted morphologically or physiologically to grow in salt-rich soil: the plants take in water containing high levels of solutes. |
| Salt Pans | High salinity of salt that no plant or animal can survive in |
| Decomposers | break down wastes and remains of other organisms |
| Consumers | organisms that use the food producers make or eat other consumers |
| Brackish Water | Saltwater mixed with freshwater |