In the face of increasing climate-related impacts on coral reefs, the integration of ecosystem resilience into marine conservation planning has become a priority. One strategy, including resilient areas in marine protected area (MPA) networks, relies on information on the spatial distribution of resilience. We assess the ability to model and map six indicators of coral reef resilience—stress-tolerant coral taxa, coral generic diversity, fish herbivore biomass, fish herbivore functional group richness, density of juvenile corals and the cover of live coral and crustose coralline algae. We use high spatial resolution satellite data to derive environmental predictors and use these in random forest models, with field observations, to predict resilience indicator values at unsampled locations. Predictions are compared with those obtained from universal kriging and from a baseline model. Prediction errors are estimated using cross-validation, and the ability to map each resilience indicator is quantified as the percentage reduction in prediction error compared to the baseline model. Results are most promising (percentage reduction = 18.3%) for mapping the cover of live coral and crustose coralline algae and least promising (percentage reduction = 0%) for coral diversity. Our study has demonstrated one approach to map indicators of coral reef resilience. In the context of MPA network planning, the potential to consider reef resilience in addition to habitat and feature representation in decision-support software now exists, allowing planners to integrate aspects of reef resilience in MPA network development.
Obura, D.O.; Grimsditch, G. Resilience Assessment of Coral Reefs—Assessment Protocol for Coral Reefs, Focusing on Coral Bleaching and Thermal Stress; IUCN working group on Climate Change and Coral Reefs, IUCN: Gland, Switzerland, 2009; p. 70.
Maina, J.; McClanahan, T.R.; Venus, V.; Ateweberhan, M.; Madin, J. Global gradients of coral exposure to environmental stresses and implications for local management. PLoS ONE 2011, doi:10.1371/journal.pone.0023064.
Govan, H. Status and Potential of Locally-Managed Marine Areas in the South Pacific: Meeting Nature Conservation and Sustainable Livelihood Targets through Wide-Spread Implementation of LMMAS; University Library of Munich: Munich, Germany, 2009; p. 95.
Ball, I.R.; Watts, M.E.; Possingham, H.P. Marxan and Relatives: Software for Spatial Conservation Prioritisation. In Spatial Conservation Prioritization: Quantitative Methods and Computational Tools; Moilanen, A., Wilson, K.A., Possingham, H., Eds.; Oxford University Press: New York, NY, USA, 2009; pp. 185–195.
Moses, W.J.; Gitelson, A.A.; Berdnikov, S.; Povazhnyy, V. Estimation of chlorophyll-a concentration in case II waters using MODIS and MERIS data—Successes and challenges. Environ. Res. Lett. 2009, doi:10.1088/1748-9326/4/4/045005.
Bahuguna, A.; Nayak, S.; Roy, D. Impact of the tsunami and earthquake of 26th December 2004 on the Vital Coastal Ecosystems of the Andaman and Nicobar Islands assessed using RESOURCESAT AWiFS Data. Int. J. Appl. Earth Obs. Geoinf 2008, 10, 229–237.
Fabricius, K.; Wild, C.; Wolanski, E.; Abele, D. Effects of transparent exopolymer particles and muddy terrigenous sediments on the survival of hard coral recruits. Estuar. Coast. Shelf. Sci 2003, 57, 613–621.
Knudby, A.; Roelfsema, C.; Lyons, M.; Phinn, S.; Jupiter, S. Mapping fish community variables by integrating field and satellite data, object-based image analysis and modeling in a traditional Fijian fisheries management area. Remote Sens 2011, 3, 460–483.
Cheal, A.J.; Emslie, M.; MacNeil, M.A.; Miller, I.; Sweatman, H. Spatial variation in the functional characteristics of herbivorous fish communities and the resilience of coral reefs. Ecol. Appl 2013, 23, 174–188.
Adams, V.M.; Mills, M.; Jupiter, S.D.; Pressey, R.L. Improving social acceptability of marine protected area networks: A method for estimating opportunity costs to multiple gear types in both fished and currently unfished areas. Biol. Conserv 2011, 144, 350–361.
Green, A.; Bellwood, D.R. Monitoring Functional Groups of Herbivorous Reef Fishes as Indicators of Coral Reef Resilience: A Practical guide for Coral Reef Managers in the Asia Pacific Region; IUCN: Gland, Switzerland, 2009; p. 70.
McClanahan, T.R.; Ateweberhan, M.; Graham, N.A.J.; Wilson, S.K.; Sebastian, C.R.; Guillaume, M.M.M.; Bruggemann, J.H. Western Indian Ocean coral communities: Bleaching responses and susceptibility to extinction. Mar. Ecol. Prog. Ser 2007, 337, 1–13.
Knudby, A.; LeDrew, E.; Brenning, A. Predictive mapping of reef fish species richness, diversity and biomass in Zanzibar using IKONOS imagery and machine-learning techniques. Remote Sens. Environ 2010, 114, 1230–1241.
Adam, T.C.; Schmitt, R.J.; Holbrook, S.J.; Brooks, A.J.; Edmunds, P.J.; Carpenter, R.C.; Bernardi, G. Herbivory, Connectivity, and ecosystem resilience: Response of a coral reef to a large-scale perturbation. PLoS ONE 2011, doi:10.1371/journal.pone.0023717.
McClanahan, T.R.; Graham, N.A.J.; Maina, J.; Chabanet, P.; Bruggemann, J.H.; Polunin, N.V.C. Influence of instantaneous variation on estimates of coral reef fish populations and communities. Mar. Ecol. Prog. Ser 2007, 340, 221–234.
Done, T.J.; DeVantier, L.M.; Turak, E.; Fisk, D.A.; Wakeford, M.; van Woesik, R. Coral growth on three reefs: Development of recovery benchmarks using a space for time approach. Coral Reefs 2010, 29, 815–833.
De Vantier, L.M.; De’ath, G.; Turak, E.; Done, T.J.; Fabricius, K.E. Species richness and community structure of reef-building corals on the nearshore great barrier reef. Coral Reefs 2006, 25, 329–340.
Roelfsema, C.; Phinn, S. Integrating field data with high spatial resolution multispectral satellite imagery for calibration and validation of coral reef benthic community maps. J. Appl. Remote Sens. 2010, doi:10.1117/1.3430107.
Wedding, L.M.; Friedlander, A.M.; McGranaghan, M.; Yost, R.S.; Monaco, M.E. Using bathymetric lidar to define nearshore benthic habitat complexity: implications for management of reef fish assemblages in Hawaii. Remote Sens. Environ 2008, 112, 4159–4165.
GeoEye. GeoEye Product Specifications, Available online: http://www.geoeye.com/CorpSite/products-and-services/imagery-collection/satellite-imagery-products/product-specifications.aspx (accessed on 28 July 2012).
Done, T.; Turak, E.; Wakeford, M.; DeVantier, L.; McDonald, A.; Fisk, D. Decadal changes in turbid-water coral communities at Pandora Reef: Loss of resilience or too soon to tell? Coral Reefs 2007, 26, 789–805.
Phinn, S.; Roelfsema, C.; Stumpf, R. Remote Sensing: Discerning the Promise from the Reality. In Integrating and Applying Science: A Handbook for Effective Coastal Ecosystem Assessment; Longstaff, B.J., Carruthers, T.J.B., Dennison, W.C., Lookingbill, T.R., Hawkey, J.M., Thomas, J.F., Wicks, E.C., Woerner, J., Eds.; IAN Press: Cambridge, MD, USA, 2010; pp. 201–222.
Maynard, J.A.; Marshall, P.A.; Johnson, J.E.; Harman, S. Building resilience into practical conservation: Identifying local management responses to global climate change in the Southern Great Barrier Reef. Coral Reefs 2010, 29, 381–391.