JVoss_BenthicEcologyMeeting_StLucieReef
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Talk presented at the 2014 Benthic Ecology Meeting in Jacksonville. Presented by Dr. Joshua Voss, the talk focused on the coral communities of the St Lucie Reef
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JVoss_BenthicEcologyMeeting_StLucieReef
- 1. Estuarine impacts on coral reef health and the implications for management in Southeast Florida Joshua Voss1, Jeff Beal2, Maureen Williams1, Lisa Cohen1, Sara Edge, Courtney Klepac1 1 2 Photo: A. Boerner
- 2. Altered hydrology of South Florida • 20% of Lake O. flows to SLE • Max 4.7 billion gallons per day • Largely agricultural discharge • Continuous Pulsed Flow
- 3. St. Lucie Estuary Watershed & Discharges C-44 St. Lucie Reef C-23 C-24 10 mile
- 4. Before Discharges During Discharges St. Lucie Reef Photo: M. Perry Photo: C. Perry Photo: A. Boerner Photo: J. Thurlow-Lippisch
- 5. Tracking Freshwater Discharges and Their Impact Beyond the Inlet South Ledge Central North Inlet St. Lucie Reef >250 species of fishes 21 species of sponges 24 species of hard corals 13 species of soft corals 17 species of crustaceans 45 other inverts 23 species of algae Key Fisheries Resource
- 6. Tracking Salinity at St. Lucie Reef
- 7. Are drops in salinity related to RAINFALL? FRESHWATER DISCHARGE?
- 8. How do estuarine discharges affect coral health? Zooxanthellae Gene Expression Pseudodiploria clivosa Montastraea cavernosa Bacterial Communities
- 9. • Custom microarray – 148 coral & zoox genes – 2000 total features • Expression of stress genes elevated during discharge events – Cell metabolism – Tissue repair – Osmotic stress-related Coral and Zooxanthellae Gene Expression
- 10. Coral Bacterial Community Profile Analysis P. clivosa SLR, Fall Stress: 0.14 Stress: 0.17 SLR FL Keys USVI Bahamas P. clivosa SLR, Summer P. clivosa SLR, Winter Time: R = 0.571, p < 0.005* Site: R = 0.018, p = 0.415 R = 0.535, p < 0.001 P. clivosa SLR, Spring
- 11. Summary • Canal discharges and rainfall directly impact salinity and water quality at St. Lucie Reef • Significant increases in coral stress gene expression during summer discharge events • St. Lucie corals harbor dynamic microbial assemblages that differ significantly from corals in other Caribbean regions • Corals are at St. Lucie Reef are apparently not reproductively active sink populations?
- 12. Ongoing and Future Work • Ex situ mesocosm experiments to directly assess the impacts of discharge water + temperature • Assess population structure for M. cavernosa and P. clivosa • Determine coral genotypes resistant to discharge stress • Continue characterization of microbial communities
- 13. Comprehensive Everglades Restoration Plan (CERP) Indian River Lagoon – South Projects
- 14. Jeff Beal Sara Edge Lisa Cohen Courtney Klepac Maureen Williams Ashley Sproles Jennifer Polinski Amanda Alker Michael Studivan Jimmy Nelson Dennis Hanisak Charles Jabaly Susan Laramore Clay Cook Kristen Davis 2 3 The Banbury
- 15. Seeking intelligent, dedicated, and motivated graduate students Visit vosslab.weebly.com Or email jvoss2@hboi.fau.edu Follow @Vosslaboratory
Editor's Notes
- An interesting place to study coral stress and the potential influence of estuarine discharge is St. Lucie Reef. Since it is the Northern boundary for many coral species in the U.S. it lays at the thermal limit for the corals. It lies just South of the St. Lucie Inlet in Stuart (seen in the yellow square). Its location near the inlet causes it to be subjected to estuarine discharge from the St. Lucie River, Lake Okeechobee, and the various other canals that drain into the St. Lucie Estuary. The water often experiences drops in salinity, high concentrations of nutrients and suspended particles and sometimes pollution that may be effecting the corals.
- An interesting place to study coral stress and the potential influence of estuarine discharge is St. Lucie Reef. Since it is the Northern boundary for many coral species in the U.S. it lays at the thermal limit for the corals. It lies just South of the St. Lucie Inlet in Stuart (seen in the yellow square). Its location near the inlet causes it to be subjected to estuarine discharge from the St. Lucie River, Lake Okeechobee, and the various other canals that drain into the St. Lucie Estuary. The water often experiences drops in salinity, high concentrations of nutrients and suspended particles and sometimes pollution that may be effecting the corals.
- An interesting place to study coral stress and the potential influence of estuarine discharge is St. Lucie Reef. Since it is the Northern boundary for many coral species in the U.S. it lays at the thermal limit for the corals. It lies just South of the St. Lucie Inlet in Stuart (seen in the yellow square). Its location near the inlet causes it to be subjected to estuarine discharge from the St. Lucie River, Lake Okeechobee, and the various other canals that drain into the St. Lucie Estuary. The water often experiences drops in salinity, high concentrations of nutrients and suspended particles and sometimes pollution that may be effecting the corals.
- Land-based sources such as freshwater runoff and excess nutrients can be particularly problematic for corals. So generally, we are interested in the potential effects of water quality and estuarine runoff on coral health. There are many coral health response variables being assessed in this overall project, but for my internship research we focused on two: Zooxanthellae and Chlorophyll
- An interesting place to study coral stress and the potential influence of estuarine discharge is St. Lucie Reef. Since it is the Northern boundary for many coral species in the U.S. it lays at the thermal limit for the corals. It lies just South of the St. Lucie Inlet in Stuart (seen in the yellow square). Its location near the inlet causes it to be subjected to estuarine discharge from the St. Lucie River, Lake Okeechobee, and the various other canals that drain into the St. Lucie Estuary. The water often experiences drops in salinity, high concentrations of nutrients and suspended particles and sometimes pollution that may be effecting the corals.