- Salt marshes can have 2 zones. The ___________ is subject to daily tides and is regularly covered by water and then exposed. -   estuary
-   upper marsh
-   halophytic zone
-   lower marsh
 
- Several factor that affect formation of salt marshes include: -   Temperature and rainfall, tidal inundation and wave energy, elevation and slope, sediment and soil composition, and surface water and soil salinity.
 
- Plant species diversity is low in salt marshes. -   True
-   False
 
- What makes a salt marsh an important nursery? -   Salt marshes offer refuges from predators for larval or juvenile aquatic animals.
 
- Salt marshes are associated with ______. (choose all that apply) -   protected water
-   tropical climates
-   barrier islands
-   estuaries
-   low-energy coastlines
-   Atlantic coastlines
-   flat waters