Abstract
Methods for monitoring the status of marine communities are increasingly adopting the use of images captured in the field. However, it is not always clear how data collected from photographic images relate to historic data collected using traditional underwater visual census methods. Here, we compare coral health and disease data collected in situ by scuba divers with photographic images collected simultaneously at 12 coral reef sites. Five globally relevant coral diseases were detected on 194 colonies from in situ surveys and 79 colonies from photos, whilst 698 colonies from in situ surveys and 535 colonies from photos exhibited signs of compromised health other than disease. Comparisons of in situ surveys with photographic analyses indicated that the number of disease cases occurring in the examined coral populations (prevalence) was six times higher (4.5 vs. 0.8% of colonies), whilst compromised health was three times higher (14 vs. 4% of colonies) from in situ surveys. Skeletal eroding band disease, sponge overgrowth and presence of Waminoa flatworms were not detected in photographs, though they were identified in situ. Estimates of black band disease and abnormally pigmented coral tissues were similar between the two methods. Estimates of the bleached and healthy colonies were also similar between methods and photographic analyses were a strong predictor of bleached (r 2 = 0.8) and healthy (r 2 = 0.5) colony prevalence from in situ surveys. Moreover, when data on disease and compromised health states resulting in white or pale coral colony appearance were pooled, the prevalence of ‘white’ colonies from in situ (14%) and photographic analyses (11%) were statistically similar. Our results indicate that information on coral disease and health collected by in situ surveys and photographic analyses are not directly comparable, with in situ surveys generally providing higher estimates of prevalence and greater ability to identify some diseases and compromised states. Careful sampling of photographs can however identify signs of coral stress, including some coral diseases, which may be used to trigger early-warning management interventions.
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References
Beeden, R., Maynard, J. A., Marshall, P. A., Heron, S. F., & Willis, B. L. (2012). A framework for responding to coral disease outbreaks that facilitates adaptive management. Environmental Management, 49(1), 1–13.
Bennett, K., Wilson, S. K., Shedrawi, G., McLean, D., & Langlois, T. J. (2016). Can diver operated stereo-video surveys for fish be used to collect meaningful data on benthic coral reef communities? Limnology and Oceanography: Methods. doi:10.1002/lom3.10141.
Bruno, J. F. (2015). Marine biology: the coral disease triangle. Nature Climate Change, 5(4), 302–303.
Bruno, J. F., & Selig, E. R. (2007). Regional decline of coral cover in the Indo-Pacific: timing, extent, and subregional comparisons. PloS One, 2(8), e711. doi:10.1371/journal.pone.0000711.
Bruno, J. F., Selig, E. R., Casey, K. S., Page, C. A., Willis, B. L., Harvell, C. D., et al. (2007). Thermal stress and coral cover as drivers of coral disease outbreaks. PLoS Biology, 5(6), e124. doi:10.1371/journal.pbio.0050124.
Burgess, S. C., Osborne, K., Sfiligoj, B., & Sweatman, H. (2010). Can juvenile corals be surveyed effectively using digital photography?: implications for rapid assessment techniques. Environmental Monitoring and Assessment, 171(1–4), 345–351.
Carpenter, K. E., Abrar, M., Aeby, G., Aronson, R. B., Banks, S., Bruckner, A., et al. (2008). One-third of reef-building corals face elevated extinction risk from climate change and local impacts. Science, 321(5888), 560–563.
Epstein, P. R. (2001). Climate change and emerging infectious diseases. Microbes and Infection, 3(9), 747–754. doi:10.1016/S1286-4579(01)01429-0.
Forde, M. J. (1992). Populations, behaviour and effects of Drupella cornus on the Ningaloo Reef, Western Australia. In S. Turner (Ed.), Drupella cornus: a synopsis (pp. 45–50). Como, WA: Department of Conservation and Land Management
Gardner, T. A., Côté, I. M., Gill, J. A., Grant, A., & Watkinson, A. R. (2003). Long-term region-wide declines in Caribbean corals. Science, 301(5635), 958–960.
Goetze, J. S., Jupiter, S. D., Langlois, T. J., Wilson, S. K., Harvey, E. S., Bond, T., & Naisilisili, W. (2015). Diver operated video most accurately detects the impacts of fishing within periodically harvested closures. Journal of Experimental Marine Biology and Ecology, 462, 74–82.
Great Barrier Reef Marine Park AuthourityAuthority. (2014). Reef rescue marine monitoring program quality assurance and quality control manual 2012/2013. http://elibrary.gbrmpa.gov.au/jspui/handle/11017/2876. Accessed 10 May 2016
Green, E. P., & Bruckner, A. W. (2000). The significance of coral disease epizootiology for coral reef conservation. Biological Conservation, 96(3), 347–361.
Harvell, C. D., Jordán-Dahlgren, E., Merkel, S., Rosenberg, E., Raymundo, L., Smith, G., et al. (2007). Coral disease, environmental drivers, and the balance between coral and microbial associates. Oceanography, 20, 172–195.
Harvell, C. D., Kim, K., Burkholder, J. M., Colwell, R. R., Epstein, P. R., Grimes, D. J., et al. (1999). Emerging marine diseases—climate links and anthropogenic factors. Science, 285(5433), 1505–1510.
Harvell, C. D., Mitchell, C. E., Ward, J. R., Altizer, S., Dobson, A. P., Ostfeld, R. S., & Samuel, M. D. (2002). Climate warming and disease risks for terrestrial and marine biota. Science, 296(5576), 2158–2162.
Harvell C. D., Woodley, C., Raymundo, L., & Sato, Y. (2008). Detecting and assessing outbreaks. In L. J. Raymundo, C. S. Couch, & C. D. Harvell (Eds.), Coral disease handbook: guidelines for assessment monitoring and management (pp. 65–74). Coral Reef Targeted Research and Capacity Building for Management Program. http://www.gefcoral.org/Publications/tabid/3260/language/en-US/Default.aspx. Accessed 10 May 2016.
Harvey, E., Fletcher, D., Shortis, M. R., & Kendrick, G. A. (2004). A comparison of underwater visual distance estimates made by scuba divers and a stereo-video system: implications for underwater visual census of reef fish abundance. Marine and Freshwater Research, 55(6), 573–580.
Heron, S. F., Willis, B. L., Skirving, W. J., Eakin, C. M., Page, C. A., & Miller, I. R. (2010). Summer hot snaps and winter conditions: modelling white syndrome outbreaks on Great Barrier Reef corals. PloS One, 5(8), e12210.
Holmes, T. H., Wilson, S. K., Travers, M. J., Langlois, T. J., Evans, R. D., Moore, G. I., et al. (2013). A comparison of visual-and stereo-video based fish community assessment methods in tropical and temperate marine waters of Western Australia. Limnology and Oceanography, Methods, 11, 337–350.
Jonker, M., Johns, K., & Osborne, K. (2008). Surveys of benthic reef communities using underwater digital photography and counts of juvenile corals. Long-term Monitoring of the Great Barrier Reef. Standard Operational Procedure. http://epubs.aims.gov.au/handle/11068/8019. Accessed 10 May 2016.
Lamb, J. B., True, J. D., Piromvaragorn, S., & Willis, B. L. (2014). Scuba diving damage and intensity of tourist activities increases coral disease prevalence. Biological Conservation, 178, 88–96.
Langlois, T. J., Harvey, E. S., Fitzpatrick, B., Meeuwig, J. J., Shedrawi, G., & Watson, D. L. (2010). Cost-efficient sampling of fish assemblages: comparison of baited video stations and diver video transects. Aquatic Biology, 9(2), 155–168.
Mallet, D., & Pelletier, D. (2014). Underwater video techniques for observing coastal marine biodiversity: a review of sixty years of publications (1952–2012). Fisheries Research, 154, 44–62.
Maynard, J., Van Hooidonk, R., Eakin, C. M., Puotinen, M., Garren, M., Williams, G., et al. (2015). Projections of climate conditions that increase coral disease susceptibility and pathogen abundance and virulence. Nature Climate Change, 5(7), 688–694.
Miller, I. R., Jonker, M., & Coleman, G. (2009). Crown-of-thorns starfish and coral surveys using the manta tow and SCUBA search techniques. Long-term monitoring of the great barrier reef standard operation procedure. https://www.researchgate.net/profile/Ian_Miller3/publication/258238840_Crown-of-thorns_starfish_and_coral_surveys_using_the_manta_tow_and_SCUBA_search_techniques/links/0deec52782a1381f73000000.pdf. Accessed 11 May 2016.
Miller, J., Waara, R., Muller, E., & Rogers, C. (2006). Coral bleaching and disease combine to cause extensive mortality on reefs in US Virgin Islands. Coral Reefs, 25(3), 418–418.
Moore, J. A., Bellchambers, L. M., Depczynski, M. R., Evans, R. D., Evans, S. N., Field, S. N., et al. (2012). Unprecedented mass bleaching and loss of coral across 12 of latitude in Western Australia in 2010–11. PloS One, 7(12), e51807.
Murphy, H. M., & Jenkins, G. P. (2010). Observational methods used in marine spatial monitoring of fishes and associated habitats: a review. Marine and Freshwater Research, 61(2), 236–252.
Page, C. A., & Stoddart, J. A. (2010). New records of five coral diseases from the Pilbara Region of Western Australia. Coral Reefs, 29(4), 987–987.
Page, C. A., & Willis, B. (2006). Distribution, host range and large-scale spatial variability in black band disease prevalence on the Great Barrier Reef, Australia. Diseases of Aquatic Organisms, 69, 41–51.
Page, C. A., & Willis, B. L. (2008). Epidemiology of skeletal eroding band on the Great Barrier Reef and the role of injury in the initiation of this widespread coral disease. Coral Reefs, 27(2), 257–272.
Page, C. A., Baker, D. M., Harvell, C. D., Golbuu, Y., Raymundo, L., Neale, S. J., et al. (2009). Influence of marine reserves on coral disease prevalence. Diseases of Aquatic Organisms, 87, 135–150.
Page, C. A., Cróquer, A., Bastidas, C., Rodríguez, S., Neale, S. J., Weil, E., & Willis, B. L. (2016). Halofolliculina ciliate infections on corals (skeletal eroding disease). Diseases of Coral, 361–375.
Pauly, D. (1995). Anecdotes and the shifting baseline syndrome of fisheries. Trends in Ecology & Evolution, 10(10), 430.
Pollock, F. J., Lamb, J. B., Field, S. N., Heron, S. F., Schaffelke, B., Shedrawi, G., et al. (2014). Sediment and turbidity associated with offshore dredging increase coral disease prevalence on nearby reefs. PloS One, 9(7), e102498. doi:10.1371/journal.pone.0102498.
Randall, C. J., & Van Woesik, R. (2015). Contemporary white-band disease in Caribbean corals driven by climate change. Nature Climate Change, 5(4), 375–379.
Ruiz-Moreno, D., Willis, B., Page, C. A., Weil, E., Cróquer, A., Vargas-Angel, B., et al. (2012). Global coral disease prevalence associated with sea temperature anomalies and local factors. Diseases of Aquatic Organisms, 100(3), 249–261. doi:10.3354/dao02488.
Sweatman, H. H., Burgess, S., Cheal, A. A., Coleman, G. G., Delean, S. S., Emslie, M., et al. (2005). Long-term monitoring of the great barrier reef, status report number 5. http://epubs.aims.gov.au/handle/11068/6070. Accessed 10 May 2016.
Thompson, A. A., & Mapstone, B. D. (1997). Observer effects and training in underwater visual surveys of reef fishes. Marine Ecology Progress Series, 154, 53–63.
Turner, J. A., Polunin, N. V., Field, S. N., & Wilson, S. K. (2015). Measuring coral size-frequency distribution using stereo video technology, a comparison with in situ measurements. Environmental Monitoring and Assessment, 187(5), 1–10.
Ward, J. R., & Lafferty, K. D. (2004). The elusive baseline of marine disease: are diseases in ocean ecosystems increasing? PLoS Biology, 2(4), e120.
Weil, E., Jordan-dahlgren, E., Bruckner, A., & Raymundo, L. (2008). Assessment and monitoring protocols. In L. Raymundo, C. Couch, & C. D. Harvell (Eds.), Coral disease handbook: guidelines for assessment, monitoring and managmenet (pp. 48–64). Melbourne, Victoria: Currie Communications.
Willis, B. L., Page, C. A., & Dinsdale, E. A. (2004). Coral disease on the great barrier reef. In Coral health and disease (pp. 69–104). Springer. http://link.springer.com/chapter/10.1007/978-3-662-06414-6_3. Accessed 10 May 2016.
Acknowledgements
The authors would like to acknowledge Allan Shields and Ben Gryta of the Fisheries Vessel PV Edwards and Rachael Middlebrook and Kevin Crane of the Western Australia Department of Parks and Wildlife (DPaW) and the Office of the Environmental Protection Authority for their assistance in the field. This project was funded as part of the Dredging Audit and Surveillance Program by the Gorgon Joint Venture as part of the environmental offsets. The Gorgon project is a joint venture of the Australian subsidiaries of Chevron, Exxon Mobil, Shell, Osaka Gas, Tokyo Gas and Chubu Electric Power.
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Page, C.A., Field, S.N., Pollock, F.J. et al. Assessing coral health and disease from digital photographs and in situ surveys. Environ Monit Assess 189, 18 (2017). https://doi.org/10.1007/s10661-016-5743-z
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DOI: https://doi.org/10.1007/s10661-016-5743-z