a gis-based decision support tool for oyster reef habitat ...2016 esri ocean gis...
TRANSCRIPT
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A GIS-based Decision Support Tool
for Oyster Reef Habitat Restoration
Seth Theuerkauf, Brandon Puckett, David Eggleston
PhD Candidate, DoD NDSEG Fellow
ESRI Ocean GIS Forum 2016
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Oyster ReefsProvide valuable ecosystem services
and economic benefits
Credit: Nate GeraldiCredit: Dave Eggleston
0 Oysters 20 Oysters 40
Oysters
essential fish habitat shoreline protection
water filtration
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Global Oyster Reef Declines
Credit: Beck et al. 2011, BioScience
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Reef Restoration
• Life history: dispersive larval stage
• Goal: provide settlement habitat & catalyze reef development
• Challenge: identifying optimal locations in estuary to restore
www.njdmf.org
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Emergence of GIS-based
Decision Support Tools
• Goal: identify optimal restoration areas within vast bodies of water
• How: spatially integrate relevant biophysical and socioeconomic factors
? unsuitable
suitable
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Oyster Restoration in North
Carolina• < 2% natural reefs
remain
Credit: Jay Fleming
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Oyster Restoration in North
Carolina• < 2% natural reefs
remain
• DMF sanctuary program Goal: restore an interconnected network of protected reefs
• Knowledge gap: where best to focus restoration efforts
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A GIS-based Decision Support Tool
for Oyster Sanctuary Restoration in NC
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Tool Development
4. Conduct sensitivity analysis, model validation
3. Develop GIS-based suitability model
2. Assemble spatial data
1. Prioritize relevant spatial factors
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1. Prioritize relevant spatial
factors• Biological (e.g., larval dispersal)
• Environmental (e.g., salinity)
• Socioeconomic (e.g., military zones)
How?
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2. Assemble spatial data
Exclusion
• Criteria is either met, or not
Threshold
• Each layer reclassified according to known relationships
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2. Assemble spatial data
Exclusion• Bathymetry
• Sediment
• SAV presence
• Nursery areas
• Shellfish leases
• Navigational channels
• Military zones
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2. Assemble spatial data
Threshold
• Larval connectivity
• Salinity
• Dissolved oxygen
• Material stockpile
sites
• Boat rampsADCIRC (Advanced Circulation Model)
+ Particle Tracking Model (PTM)Puckett and Eggleston (2012)
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3. Develop GIS-based suitability
model• Weight threshold layers based on importance
• Filter based on all exclusion layers
23% 20% 15% 11%
+ + + + … = 100%Larval
ExportSalinity Larval
Import
Dissolved
Oxygen
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3. Develop GIS-based suitability
model
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4. Conduct sensitivity analysis,
model validation
23% 20% 15% 11%
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4. Conduct sensitivity analysis,
model validation
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• Goal: identify areas that maximize fish production & recreational fishing opportunities
• Incorporate:- ~20 years of trawl
survey data
- larval fish ingress modeling
Reef-associated Fish Habitat
Next Steps: Integration of
Ecosystem Services
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• Goal: identify areas that maximize water quality enhancement benefits
• Incorporate:- ~10 years calibrated
MERIS chlorophyll a
- water flow velocities (ADCIRC)
- dissolved oxygen
- variability of all factors
Next Steps: Integration of
Ecosystem ServicesOyster Filtration
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Making Tool Accessible
maps.coastalresilience.org
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Acknowledgements• Rodney Guajardo (NCNERRS), Craig Hardy (NCDMF), Rick Luettich
(UNC-CH), Jie Gao (UNC-CH), Ernie Hain (NCDMF), Robert Weaver
(UNC-CH), Corbett Kerr (UNC-CH), Craig Layman (NCSU), Pat Halpin
(Duke), Marine Ecology Lab (NCSU)
• Funding agencies and partners:
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Contact InfoSeth Theuerkauf, [email protected]