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Title: Coral mass bleaching and reef temperatures at Navassa Island, 2006
Status: Completed

Bleaching and associated mortality is an extreme threat to the persistence of coral populations in the projected warming regime of the next few decades. Recent evidence indicates that thermal bleaching thresholds may be affected by water quality gradients. The unexpected encounter of a coral mass bleaching event at a remote, uninhabited Caribbean island (Navassa) during a routine reef assessment cruise in November 2006 provided the opportunity to characterize bleaching responses and thermal exposure in an oceanic area with negligible continental influence or human impact on water quality. The coral taxa most susceptible to bleaching were Agaricia spp. and Montastraea faveolata. Siderastraea siderea, Diploria spp. and Porites porites were intermediately affected, while Porites astreoides and Montastraea cavernosa were minimally affected and negligible bleaching was observed in Acropora palmata. Bleaching prevalence (colonies > 4 cm diameter) ranged from 0.16 to 0.63 among sites. Deeper sites (between 18 and 37 m) had significantly higher prevalence of bleaching than shallow sites (<10 m). This general pattern of more bleaching in deeper sites also occurred within species. Though exposure to high-temperature stress was not greater at deeper sites, water motion, which may bolster bleaching resistance, was likely less. In situ loggers indicated temperatures over 30 °C initiated at shallow sites in mid-August, at deeper sites in early September, and were persistent at all sites until mid-October. Long term (1983–2007) climatologies constructed from AVHRR SSTs suggest that the mass bleaching event observed at Navassa in 2006 corresponded with greater intensity and duration of warm temperature anomalies than occurred in 2005, for which no in situ observations (bleaching nor temperature) are available.

Other Citation Details:

.W. Miller, G.A. Piniak, D.E. Williams,

Coral mass bleaching and reef temperatures at Navassa Island, 2006,

Estuarine, Coastal and Shelf Science,

Volume 91, Issue 1,


Pages 42-50,

ISSN 0272-7714,


DOI (Digital Object Identifier): 10.1016/j.ecss.2010.10.005
DOI Registration Authority: Elsevier Wordmark


Theme Keywords

Thesaurus Keyword
CoRis Theme EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates > Biomass
CoRis Theme EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates > Census > Macroinvertebrates

Temporal Keywords

Thesaurus Keyword
None 2005
None 2006

Instrument Keywords

Thesaurus Keyword
None 1-m2 drop sampler

Document Information

Document Type: Journal article
Format: Acrobat Portable Document Format
Status Code: Published

Support Roles


CC ID: 857350
Date Effective From: 2010
Date Effective To:
Contact (Person): Williams, Dana E
Address: 75 Virginia Beach Drive
Miami, FL 33149
Unites States
Email Address:
Phone: 305-767-3262
View Historical Support Roles

Distribution Information

Distribution 1

CC ID: 857282
Download URL:
Compression: Uncompressed
Review Status: Chked Viruses Inapp Content

Catalog Details

Catalog Item ID: 56739
GUID: gov.noaa.nmfs.inport:56739
Metadata Record Created By: Lee M Weinberger
Metadata Record Created: 2019-06-24 14:19+0000
Metadata Record Last Modified By: Lee M Weinberger
Metadata Record Last Modified: 2021-10-13 18:43+0000
Metadata Record Published: 2021-10-13
Owner Org: SEFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2022-10-14