Ecohydrology_Lecture7_F11

Ecohydrology_Lecture7_F11 - Wetland Ecohydrology...

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Wetland Ecohydrology Ecohydrolog y
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Humid areas don’t have the self-organization driver of water limitation (most of the time) Wetlands have the reverse problem (too much water) Importance of hummocks, adaptation to water logging Examples of feedbacks Bistable vegetation dynamics (species affect water table dynamics) Watering up process following disturbance, early colonist
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Research Challenges 1. How do species vary in root uptake mechanisms? How does this modify the effects of changing water table depth? 2. What are root distributions in shallow fluctuating water table sites? What do these suggest about optimality? 3. How do plants decide between nutrient vs. oxygen stressors? 4. What are the magnitudes and thresholds of deep water stresses? 5. How do root uptake and capillary forces interact? 6. How does the stochastic rainfall signal get propagated through a wetland? What are the properties of that “filter”? 7. What is the magnitude of lateral water movement, and how does this affect the “filter” properties?
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Ecohydrology_Lecture7_F11 - Wetland Ecohydrology...

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