NDLI: Prediction of coral bleaching in the Florida Keys using remotely sensed data

Content Provider	Springer Nature Link
Author	Barnes, Brian B. Hallock, Pamela Hu, Chuanmin Muller Karger, Frank Palandro, David Walter, Cory Zepp, Richard
Copyright Year	2015
Abstract	Shallow water tropical coral reefs may bleach due to extremes in a variety of environmental factors. Of particular concern have been temperature, ultraviolet radiation, and photosynthetically available radiation. Satellite observation systems allow synoptic-scale monitoring of coral environments that can be used to investigate the effects of such environmental parameters. Recent advancements in algorithm development for new satellite data products have made it possible to include light availability in such monitoring. Long-term satellite data (2000–2013), in combination with in situ bleaching surveys (N = 3,334; spanning 2003–2012), were used to identify the environmental factors contributing to bleaching of Florida reef tract corals. Stepwise multiple linear regression supports the conclusion that elevated sea surface temperature (SST; partial R adj 2 = 0.13; p < 0.001) and high visible light levels reaching the benthos (partial R adj 2 = 0.06; p < 0.001) each independently contributed to coral bleaching. The effect of SST was modulated by significant interactions with wind speed (partial R adj 2 = 0.03; p < 0.001) and ultraviolet benthic available light (partial R adj 2 = 0.01; p = 0.022). These relationships were combined via canonical analysis of principal coordinates to create a predictive model of coral reef bleaching for the region. This model predicted ‘severe bleaching’ and ‘no bleaching’ conditions with 69 and 57 % classification success, respectively. This was approximately 2.5 times greater than that predicted by chance and shows improvement over similar models created using only temperature data. The results enhance the understanding of the factors contributing to coral bleaching and allow for weekly assessment of historical and current bleaching stress.
Starting Page	491
Ending Page	503
Page Count	13
File Format	PDF
ISSN	07224028
Journal	Coral Reefs
Volume Number	34
Issue Number	2
e-ISSN	14320975
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-01-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coral bleaching MODIS Sea surface temperature Light attenuation Remote sensing Water clarity Degree heating weeks Florida reef tract Freshwater & Marine Ecology Oceanography
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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