conservation of the florida reef tract
DESCRIPTION
Conservation of the Florida Reef Tract. Lexi Dolbee , Michael Ho, and Jack Tesar. Florida Reef. 45 species of reef identified 358 miles of Florida Reef Tract Specific conditions to grow … warm waters, hard surface to attach, low nitrogen & phosphate levels, shallow, clear waters - PowerPoint PPT PresentationTRANSCRIPT
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Conservation of the Florida Reef Tract
Lexi Dolbee, Michael Ho, and Jack Tesar
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Florida Reef- 45 species of reef
identified- 358 miles of Florida
Reef Tract- Specific conditions to
grow … warm waters, hard surface to attach, low nitrogen & phosphate levels, shallow, clear waters
- Grow between ½ to 7 inches in a year
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3 Reef Formations Atoll – roughly circular,
surround large lagoon
Fringing – close to shore, shallow or no lagoon separation from shore
Barrier – parallel to shore, deep lagoon separation
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Coral Polyps- Individual animal
called coral polyp, between 1-3 mm
- Attach itself to hard surface, secrete calcium carbonate for protection
- Undergo asexual reproduction, grow on top of polyp below
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Algae- Called zooxanthellae- Symbiotic relationship
with polyp’s- Through
Photosynthesis, provide oxygen and sugars
- Benefit from waste and protection
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Structures
Rougher water, Common Brain
Calmer Waters, Ivory Bush
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Blue Tang
- Acanthurus coeruleus- Order Perciformes- Feed on plankton,
smaller fish
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Stoplight Parrotfish
- Sparisoma viride- Perciformes- Beak-like jaw,
consume polyps and zooxanthellae
- Bite off coral, digestive tract separates coral and excretes it as white coral sand
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Lionfish
- Pterois- Order Scorpaeniformes- Invasive species, likely
introduced from aquarium release
- Fearless predator, consume native reef fish
- No natural predators- Human spearfishing
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Nutrient Loading in the Florida Reef
Wastewater from Everglades Agricultural Area Sugarcane farming Inundates the near-
shore reef Rich in nitrogen and
phosphorous
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Harmful Algal Blooms
High nitrogen and phosphorous levels promote Caulerpa algae growth
Algae suffocates coral Takes O2 and other
nutrients
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Harmful Algal Blooms
Vicious Cycle Coral destruction
decreases herbivore habitat
Decreased herbivory promotes algal blooms
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Dredging and Trawling
Dredging: Excavation of the sea
floorBottom Trawling:
Method of fishing involving dragging a net or cage across the sea floor
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Dredging and Trawling
Rock Shrimp fisherman a leading cause of reef damage Bottom Trawling Boat anchors
Destroying the habitat of the shrimp they are trying to catch
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Dredging and Trawling
Coral grows extremely slowly M. annularis: 6-7
mm/year Significant structural
damage is essentially permanent
High tourist traffic in Florida jeopardizes coral
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Effects of Bottom Trawling
Before After
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Effects of Climate Change Twofold increase in
hurricane activity since 1930 Nat. Geo. News, 2007
Linked to increases in greenhouse gas emissions Global Warming
Webster, et al. 2005
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Effects of Climate Change
Severe weather events damaging to coral structure Motion of water and
debris Sediment coverage
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Case Study: The Goliath Grouper
Koenig and Coleman:Patterns of Recovery of the Goliath GrouperMangroves as Essential Nursery for Goliath
Grouper
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Native to the Florida Barrier Reef
Historically commercially important
Highly susceptible to overexploitation and habitat destruction
Placed on critically endangered species by National Marine
Fisheries
About the Grouper
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Native to the Florida Reef
Largest population of grouper on the planet Other populations found of
the coast of Brazil and in the Caribbean, but they are so small they are considered extinct
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The goliath grouper dominates the reef biomass But also a hypothesized to be a keystone
species because they are a top-level predator Positive relationship between species
diversity on the reef and the presence of the Goliath Grouper This positive relationship extends to greater
diversity of other commercially important fish EX. The snapper
Ecological Impact
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Grow and mature very slowly Group to spawn (makes them easier to catch) Their nursery grounds are being exploited making
reproduction difficult
Susceptibility of the Goliath Grouper
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Rapid overexploitation in the 80’s Fishery closed own in 1990 and
grouper was placed on critically endangered species list
Mangrove nursery degraded by agricultural, industrial, and residential development: major barrier to recovery
Many in the fishing industry want the fishery reopened for economic gain- Highly debated
Commercial Importance
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Many fishing industry stakeholders argue that the increase in the Florida population is reason to remove the goliath grouper from the endangered species list However, due to the dramatic decline in other populations of
Goliath grouper, the Florida population may be key to the prevention of extinction
The only protective measure currently implemented is the ban on fishing the grouper This has led to an increase in the Florida Barrier Reef
population, but it will not be enough to save the species Mangroves are essential to the life cycle of the grouper, saving
this resource saves the grouper and allows further recovery- Unfortunately development is harder to stop than overfishing
Conservation Debates and Attempts
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“Its not rocket science. Its harder.”
~Steve Theberge, Florida Sea Grant Extension Agent
Conservation
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Finkl, C.W. and R.H. Charlier. 2003. Sustainability of Subtropical Coastal Zones in Southeastern Florida: Challenges for Urbanized Coastal Environments Threatened by Development, Pollution, Water Supply, and Storm Hazards. Journal of Coastal Research 19: 934-943
Gerhardinger, L.C., M. Hostim-Silva, R.P. Madeiros, J. Materazi, et al. 2009. Fisher's resource mapping and goliath grouper (Epinephelus itajara) conservation in Brazil. Neotropical Ichthyology. 7:93-102.
Hoffmeister, J.E. and H.G. Multer. 1964. Growth-Rate Estimates of a Pleistocene Coral Reef of Florida. Geological Society of America Bulletin 75: 353-358.
Koenig, CC, FC Coleman, AM Eklund, J. Schull, J. Ueland. 2007. Mangroves as essential nursery habitat for goliath grouper (Epinephelus itajara). Bulletin of Marine Science 80(3):567-586.
Koenig, C.C., F.C. Coleman, C.B. Grimes, G.R. Fitzhugh, K.M. Scanlon, C.T. Gledhill, and M. Grace. Protection of Fish Spawning Habitat for the Conservation of Warm-Temperature Reef-Fish Fisheries of Shelf-Edge Reefs of Florida. Bulletin of Marine Science 66(3): 593-616.
Koenig, CC, FC Coleman, K Kingon. 2011. Pattern of recovery of the goliath grouper Epinephelus itajara (Lichtenstein, 1822) population in the southeastern U.S. Bulletin of Marine Science Fast Track Publication 87(0)0000 - doi:10.5343/bms. 2010.1056
Lapointe, B.E. 1997. Nutrient Thresholds for Bottom-Up Control of Macroalgal Blooms on Coral Reefs in Jamaica and Southeast Florida. Limnology and Oceanography 42: 1119-1131.
Porter, J.W. and O.W. Meier. 1992. Quantification of Loss and Change in Floridian Reef Coral Populations. Integrative and Comparative Biology 32(6): 625-640.
Ruiz-Carus, Ramon. March 2006. The Western Pacific Red Lionfish, Pterois Volidae, (Scorpaeniformes), in Florida. Evidence for reproduction and parasitism in the first exotic marine fish established in state waters. Florida Fish and Wildlife Conservation Commission. Biological Conservation. 128(3): 384-390.
Swart, Peter K. July 1996. The stable oxygen and carbon isotopic record from a coralgrowing in Florida Bay: a 160 year record of climatic and anthropogenic influence. University of Miami. Paleogeography, Paleoclimatology, Paleoecology. 123(1-4): 219-237.
Browning, M., 1998. 'Green linguine' causing fragile reefs to choke. The Herald, May 25, p.7A.
Coral Species Profiles. Florida Museum of Natural History. http://www.flmnh.ufl.edu/fish/southflorida/coral/Profiles.html#great
Florida's Coral Reefs. Department of Environmental Protection, Florida. July 19, 2011. http://www.dep.state.fl.us/coastal/habitats/coral/
How do Stony Corals grow? National Oceanic and Atmospheric Administration. March 25, 2008. http://oceanservice.noaa.gov/education/kits/corals/coral03_growth.html
Stevely, John. Invasive lionfish harming caribbean reefs. Florida Sea Grant. http://www.flseagrant.org/index.php?option=com_content&view=article&id=92:lionfish-decimating-caribbeans-tropical-fish-population&catid=51:research-summary&Itemid=101
Works Cited