1Estuaries/bays
2Oyster reefs/shellfish habitats
3Barrier islands
4Tidal creeks
5Seagrass meadows
5Salt marshes
7Coastal wetlands
7Nearshore coastal ocean
9Coral reefs/tropical marine ecosystems
9Agricultural landscapes and water systems
11Rocky intertidal/temperate coastal ecosystems
12Terrestrial ecosystems adjacent to aquatic systems
13Kelp forests/temperate marine forests
14Rivers/stream
15Springs/groundwater-fed aquatic systems
16Urban/coastal watersheds
17Human-dominated aquatic systems
18Watersheds as whole systems
18Freshwater wetlands
20Lakes/reservoirs
21Broad aquatic ecosystems
22Large rivers/river-floodplain systems
23Headwater streams
24Multiple connected systems
25Open ocean