Coral identification
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Presentation on identifying corals by Dr Ali Jones
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Coral identification
- 1. Corals of the Keppel Bay Islands Dr Alison Jones Centre for Environmental Management CQUniversity
- 2. Why are they important?
- 4. Why learn about them? Reefs act as a barrier to our coastline Reefs are threatened by climate change and loss of species can reduce a reef’s capacity to regenerate (Riegl, 2009 a,b)
- 5. History of the marine park 1967 Queensland Department of Mines receives an application to mine limestone on Ellison Reef off Innisfail 1967 Queensland Government prepares to grant licenses for offshore oil exploration on the Reef 1969 An oil drilling permit is granted that allows exploration in the whole of the reef 1970 Royal Commission into Exploratory and Production Drilling for Petroleum in the Great Barrier Reef commences delaying mineral exploitation of the reef 1974 Australian and Queensland governments prohibit petroleum drilling on the Great Barrier Reef 1975 The passing of the Great Barrier Reef Marine Park Act establishes the Great Barrier Reef Marine Park Authority. 2004 All sections of the Park consolidated into one entity
- 6. Catchment area ~142,000 km2 Modeled sediment yield 2571 kt/yr (SedNet ) 3000 years old
- 7. Detailed bathymetry east of Keppel Bay shows the path of the ancient Fitzroy River that meandered across the shelf. OzCoasts 2009 © Commonwealth of Australia (Geoscience Australia) 2005 100 km
- 8. OzCoasts 2009 © Commonwealth of Australia (Geoscience Australia) 2005 Detailed bathymetric map of the Fitzroy Estuary and Keppel Bay. The red box indicates the position of the sediment dunes shown in the image below with the onshore directional movement.
- 9. OzCoasts 2009 © Commonwealth of Australia (Geoscience Australia) 2005 A landsat TM image of the Fitzroy Estuary and Keppel Bay from May 2003. The whitish colouration of the water near the estuary mouth is due to suspended sediment ( ~300 mg l-1)
- 10. Unlikely reefs
- 11. So, what are corals? Polyp + Zooxanthellae
- 12. The coral symbiosis Coral polyp Zooxanthellae (Symbiodinium)
- 13. Calcification CaCO3 + CO2 + H2O → Ca(HCO3)2 Calcification involves the precipitation of dissolved ions into solid CaCO3
- 14. Saturation state of a aragonite (CaCO3) in seawater Ω = [Ca2+] ]CO3 2-] Ksp Ksp = sat equilibri or disso
- 17. ….with difficulty! Differences due to environment and geography… Differences due to genetic variation… Ok they’re important but, how do I identify them?
- 18. Wide angle photo Close-up or marco photo
- 23. Corallite structure solitary dendroid phaceloid plocoid ceroid meandroid thamnasteroid
- 30. Diaz-Pulido, 2009 New coral tissue can overgrow old dead coral tissue that is covered in algae. Discovered in 2009, this phenomenon explains the extraordinary ability of Keppel reefs to regenerate quickly following bleaching damage.
- 31. Things aren’t always as they seem….branching corals can sometimes be encrusting corals (right) dressed up to look like branching corals (left)
- 32. What coral is this?
- 33. Google Earth Pro
- 34. Thanks!
- 35. References Hilliard RW, Walker S, Hoskins N, Raaymakers S (1997) Ballast Water Risk Assessment - 12 Queensland Ports: Stage 1B Report - Environmental descriptions of the receival ports(EcoPorts Monograph Series No. 10). Brisbane: Ports Corporation of Queensland. 71 p. Anonymous (2009) Ozcoasts. Geoscience Australia. Diaz-Pulido G, McCook LJ, Dove S, Berkelmans R, Roff G, et al. (2009) Doom and boom on a resilient reef: Climate change, algal overgrowth and coral recovery. PLoS ONE 4: e5239. Rowland MJ The Keppel Islands - 'a 3000 year' event. Australian Coastal Archaeology: 141-155. Riegl BM, Purkis SJ (2009a) Model of coral population response to accelerated bleaching and mass mortality in a changing climate. Ecological Modelling 220: 192-208. Riegl B, Purkis SJ, Keck J, Rowlands GP (2009b) Monitored and modeled coral population dynamics and the refuge concept. Marine Pollution Bulletin 58: 24-38.