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Tree island sites

Water source utilization and nutrient status in tree islands in Shark River Slough, Everglades National Park. Tree island sites. Profile of a tree island. Vegetation zones on a tree island - Chekika. Emergent Hardwoods. Floodtolerant veg. Sawgrass/Slough.

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Tree island sites

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  1. Water source utilization and nutrient status in tree islands in Shark River Slough, Everglades National Park

  2. Tree island sites

  3. Profile of a tree island

  4. Vegetation zones on a tree island - Chekika Emergent Hardwoods Floodtolerant veg. Sawgrass/Slough

  5. Wet season: Two POSSIBLE water sources in tree islands Soilwater – rain trapped in leaf litter – NUTRIENT RICH Regional surface/groundwater – NUTRIENT POOR These two sources can be ISOTOPICALLY DISTINCT

  6. Stable isotopes of water Evaporating pool of water = enriched in heavy isotopeAllows for differentiating pools of water Water(H2O): Hydrogen has 2 isotopes – 1H (lighter) and 2H (heavier) Oxygen has two major isotopes -- 16O (lighter) and 18O (heavier)

  7. Dry dD=(8*d18O)+10 Meteoric Water dD (o/oo) WATER Wet Soil Water Dry Wet d18O (o/oo) WATER

  8. ENP Tree Islands - sites and methods Chekika – airboat/helicopter SatinLeaf – airboat/on foot Grossman Hammock – car/foot Per island: 20 upland plants 30 lowland plants:1. Sawgrass-flooded ecotone 2. Flooded – hammock ecotone • Water sampling: for 1 year • -Rainwater on Grossman Hammock • -Soil water (organic horizon) ( every 2 months ) • -Plant stem water ( every 2 months ) • Cryogenic distillation of soil and stem water • Isotopic analysis on mass spectrometer • Nutrient sampling: every 2 months for 1 year • Foliar N and P

  9. Results so far…Chekika

  10. acknowledgements Leo Sternberg - advisor Fernando Miralles-Wilhelm (FIU) – PI on NSF Biocomplexity Project Mike Ross (FIU) – collaboration and logistics on tree islands Fieldwork and Labwork Pablo Ruiz, Mike Klein, Brooke Shamblin, Daniel Gomez, Diane, Jeanette, Astrid, Anita , Daniel Ramirez, John Cozza, Eric, Hao, Patrick Ellsworth, Xin Wang, Patricia, Maria CamilaPinzon, Cassandra My committee – Don DeAngelis, David Janos, Leo Sternberg, Fernando Miralles-Wilhelm Funding: NSF Biocomplexity in the Environment project

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