the benefits of a multiple habitat restoration strategythe benefits of a multiple habitat...
TRANSCRIPT
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The Benefits of a Multiple Habitat Restoration Strategy
Eric Milbrandt1, Mark Thompson1, A.J. Martignette1, Loren Coen1,2, Ray Grizzle3
1 Marine Laboratory, Sanibel-Captiva Conservation Foundation2 Florida Atlantic University
3 Jackson Estuarine Laboratory, University of New Hampshire
07/19/2016Mangrove & Macrobenthos Meeting (MMM4), St.
Augustine, FL
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Clam Bayou
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Multi-species dieoffValiela et al. Mangrove Forests: One of the World's Threatened Major Tropical Environments. Bioscience
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Beck et al. Oyster Reefs at Risk and Recommendations for Conservation, Restoration, and Management Bioscience
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2006-2009
#1: Get the hydrology right! (Robin Lewis)
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A few years later....
Propagule-limitation (Lewis)Substrate-limitation (Coen)
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Phase II: speeding recovery
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2009-2011 100 yd3 shell
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2009-2011 500K propagules planted
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5/24/2006 11/18/2012
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5/24/2006 11/18/2012
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5/24/2006 11/18/2012
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5/24/2006 11/18/2012
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5/24/2006 11/18/2012
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5/24/2006 11/18/2012
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2011
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2013
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2016
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2010
TNC-1
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2013
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2016
Seagrass colonization (H. wrightii) in areas with planting and substrate addition
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• Unexpected benefits
Seagrass colonization (H. wrightii) in areas with propagule planting?
**These need additional mechanistic studies
Ray Grizzle measured uptake of chl a at all restored reefs 3 yrs. post construction
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More graphs and data…
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Planted vs. Unplanted
Category Sample size 2005-2008 2010-2013 2013-2016Planted (hectares)
9 sites 4.4X10-4 4.8 X10-4 7.6X10-4
Unplanted (hectares)
6 sites 2.7X10-4 1.7X10-4 3.2X10-4
*Aerial interpretation
Comparisons of planted versus unplanted sites*
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New Analysis for MMM4-Special Issue?
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Rapid expansion of the Mangrove Shoreline
Mangrove Area (m2) Percent change since 2005
Planted Area 12005 1,411 -2008 1,851 312011 2,811 992016 4,730 235Unplanted 1 (Control)2005 956 -2008 1028 72011 1147 202016 1434 50
Supervised Classification: Maximum Likelihood Classification (ArcGIS v. 10.2)
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Mangrove Shoreline
Mangrove Area (m2) Percent change since 2005
Planted Area 22005 2132 -2008 1841 -142011 2229 52016 3488 64Unplanted 2 (Control)2005 16102008 1486 -82011 1858 152016 2601 50
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• The landscape and seascape is a mosaic of intertwined habitats- requiring correct tidal amplitude& flushing
• Ecological intervention (planting, substrate additions) can accelerate the rate of restoration
• New techniques such as clumping (Silliman 2015) continue to emerge as lessons learned from restoration projects
• Several recent studies (e.g. Sharma et al. 2016, do oyster reefs benefit seagrass? Rest Ecol) indicate a need for a more mechanistic understanding of interactions
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Acknowledgements• Funding for the culvert was from USFWS Coastal
Program, SFWMD. Habitat restoration funding was provided by NaCO/NOAA grant to E.M., TNC/NOAA grant to L.C., GOMF/NOAA grant to E.M., Sanibel-Captiva Conservation Foundation. City of Sanibel staff (J. Evans, R. Loflin, H. Milbrandt) helped on all aspects of the restoration of Clam Bayou project