Sandy Bottom, Woodland 3"-7" p.z.
Scenario model
Current ecosystem state
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Management practices/drivers
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- Transition T1A More details
- Transition T2A More details
- Restoration pathway R3A More details
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No transition or restoration pathway between the selected states has been described
Target ecosystem state
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Description
Sandy Bottom Woodland, 3"-7" p.z., is a cottonwood-willow dominated riparian gallery woodland. Perennial surface water occurs in long reaches, with sufficient flow to sustain native obligate wetland plants. Flash floods regularly occur, resulting in overbank flow and bank scour. Cottonwood and willow seeds germinate on wet sands along the braided watercourses, and seedlings quickly establish before water levels return to normal. Natural fire is not a regular occurrence, as indicated by old-growth cactus, like saguaro, growing adjacent to the site. Saguaro are extremely sensitive to heat from burning.
Submodel
Description
Non-native Mixed Woodland is similar in function and composition to Native Riparian. Saltcedar and other non-natives (such as tree tobacco, bermudagrass, and cocklebur) are intermixed with native species. Native tree recruitment can be affected by a reduction of flash flooding events, lowering of the water table, or saltcedar competition.
Submodel
State 3
Dense Non-Native Woodland
Description
The Dense, Non-native Woodland State is a near monoculture of saltcedar.
Submodel
Mechanism
Non-native species introduction by various mechanisms including animal transport, wind, and flooding.
Mechanism
Transition processes can include fire, channel-scouring flooding, or disturbance of normal flooding regime.
Model keys
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