Phase shifts, herbivory, and the resilience of coral reefs to climate change

Hughes, Terence P., Rodrigues, Maria J, Bellwood, David R., Ceccarelli, Daniela, Hoegh-Guldberg, Ove, McCook, Laurence, Moltschaniwskyj, Natalie, Pratchett, Morgan S., Steneck, Robert S. and Willis, Bette (2007) Phase shifts, herbivory, and the resilience of coral reefs to climate change. Current Biology, 17 4: 360-365. doi:10.1016/j.cub.2006.12.049

Author Hughes, Terence P.
Rodrigues, Maria J
Bellwood, David R.
Ceccarelli, Daniela
Hoegh-Guldberg, Ove
McCook, Laurence
Moltschaniwskyj, Natalie
Pratchett, Morgan S.
Steneck, Robert S.
Willis, Bette
Title Phase shifts, herbivory, and the resilience of coral reefs to climate change
Journal name Current Biology   Check publisher's open access policy
ISSN 0960-9822
Publication date 2007-02-20
Sub-type Article (original research)
DOI 10.1016/j.cub.2006.12.049
Volume 17
Issue 4
Start page 360
End page 365
Total pages 6
Editor G. North
Place of publication Cambridge, England
Publisher Cell Press
Collection year 2008
Language eng
Subject 270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)
770306 Integrated (ecosystem) assessment and management
Abstract Many coral reefs worldwide have undergone phase shifts to alternate, degraded assemblages because of the combined effects of overfishing, declining water quality, and the direct and indirect impacts of climate change [1-9]. Here, we experimentally manipulated the density of large herbivorous fishes to test their influence on the resilience of coral assemblages in the aftermath of regional-scale bleaching in 1998, the largest coral mortality event recorded to date. The experiment was undertaken on the Great Barrier Reef, within a no-fishing reserve where coral abundances and diversity had been sharply reduced by bleaching [10]. In control areas, where fishes were abundant, algal abundance remained low, whereas coral cover almost doubled (to 20%) over a 3 year period, primarily because of recruitment of species that had been locally extirpated by bleaching. In contrast, exclusion of large herbivorous fishes caused a dramatic explosion of macroalgae, which suppressed the fecundity, recruitment, and survival of corals. Consequently, management of fish stocks is a key component in preventing phase shifts and managing reef resilience. Importantly, local stewardship of fishing effort is a tractable goal for conservation of reefs, and this local action can also provide some insurance against larger-scale disturbances such as mass bleaching, which are impractical to manage directly.
Keyword Biochemistry & Molecular Biology
Q-Index Code C1
Q-Index Status Confirmed Code
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Created: Mon, 18 Feb 2008, 16:24:24 EST