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Background mortality rates for recovering populations of Acropora cytherea in the Chagos Archipelago, central Indian Ocean
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Pratchett, M. S., Pisapia, C. and Sheppard, Charles (Charles R. C.) (2013) Background mortality rates for recovering populations of Acropora cytherea in the Chagos Archipelago, central Indian Ocean. Marine environmental research, Volume 86 . pp. 29-34. doi:10.1016/j.marenvres.2013.02.007
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Official URL: http://dx.doi.org/10.1016/j.marenvres.2013.02.007
Abstract
This study quantified background rates of mortality for Acropora cytherea in the Chagos Archipelago. Despite low levels of anthropogenic disturbance, 27.5% (149/541) of A. cytherea colonies exhibited some level of partial mortality, and 9.0% (49/541) of colonies had recent injuries. A total of 15.3% of the overall surface area of physically intact A. cytherea colonies was dead. Observed mortality was partly attributable to overtopping and/or self-shading among colonies. There were also low-densities of Acanthaster planci apparent at some study sites. However, most of the recent mortality recorded was associated with isolated infestations of the coral crab, Cymo melanodactylus. A. cytherea is a relatively fast growing coral and these levels of mortality may be biologically unimportant. However, few studies have measured background rates of coral mortality, especially in the absence of direct human disturbances. These data are important for assessing the impacts of increasing disturbances, especially in projecting likely recovery.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
| Journal or Publication Title: | Marine environmental research | ||||
| Publisher: | Elsevier | ||||
| ISSN: | 1879-0291 | ||||
| Official Date: | May 2013 | ||||
| Dates: |
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| Volume: | Volume 86 | ||||
| Page Range: | pp. 29-34 | ||||
| DOI: | 10.1016/j.marenvres.2013.02.007 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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