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 SawgrassSlough ID: 302308
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Slide1
Water source utilization and nutrient status in tree islands in Shark River Slough, Everglades National ParkSlide2
Tree island sitesSlide3
Profile of a tree islandSlide4
Vegetation zones on a tree island - Chekika
Emergent Hardwoods
Floodtolerant veg.
Sawgrass/SloughSlide5
Wet season: Two POSSIBLE water sources in tree islandsSoilwater – rain trapped in leaf litter – NUTRIENT RICH
Regional surface/groundwater – NUTRIENT POOR
These two sources can be
ISOTOPICALLY DISTINCTSlide6
Evaporating pool of water = enriched in heavy isotopeAllows for differentiating pools of waterWater(H2O):
Hydrogen has 2 isotopes –
1
H (lighter) and
2
H (heavier)
Oxygen has two major isotopes --
16
O (lighter) and
18
O (heavier)
Stable isotopes of waterSlide7
d
D (o/oo) WATER
d
18
O (o/oo) WATER
d
D=(8*
d
18
O)+10 Meteoric Water
Soil Water
Wet
Dry
Wet
DrySlide8Slide9Slide10
ENP Tree Islands - sites and methods Nutrient sampling: every 2 months
for
1 year
Foliar N and P
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
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 ecotoneSlide11
Results so far… ChekikaSlide12
acknowledgementsLeo Sternberg - advisorFernando 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
Camila
Pinzon,
Cassandra
My committee
–
Don
DeAngelis
,
David
Janos,
Leo Sternberg,
Fernando Miralles-Wilhelm
Funding: NSF
Biocomplexity
in the Environment project Slide13