WETMAAP Technique 3
Texas City/Virginia Point: Element 1
Technique 3: Recognition of Wetland Change
Element 1: Evaluate Habitat Change
Materials:
1950's Colored habitat map
1979 Taped together colored habitat maps (Skill 3, Element 1)
1989
1992
Drafting tape
Exercise:
1. Use the 1950's colored habitat map and the 1979 and 1989 colored overlays taped together.
2. List at least two differences observed:
Note: Place a piece of white paper between the 1950's NWI map and the 1979 colored overlay to observe the difference between the 1979, 1989, and 1992 colored habitats.
| 1950's and 1979 | 1. 2. |
| 1979 and 1989 | 1. 2. |
| 1989 and 1992 | 1. 2. |
3. Visually examine the colored habitat maps to determine if the following habitats increased, decreased, or stayed the same between each time period. Write increase, decrease, same in the boxes.
| Time periods |
Open Water | Salt Marsh |
Flats & Beaches | Fresh Marsh |
Wetland Forested & Scrub-shrub | Upland Scrub-shrub | Urban | Ag/ Range |
| 1950's-1979 | ||||||||
| 1979-1989 |
||||||||
| 1989-1992 |
4. Describe the changes around Swan Lake.
1950's-1979
1979-1989
1989-1992