Recovery of Diadema antillarum reduces macroalgal cover and increases abundance of juvenile corals on a Caribbean reef
Open Access
- 27 March 2001
- journal article
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 98 (9) , 5067-5071
Abstract
The transition of many Caribbean reefs from coral to macroalgal dominance has been a prominent issue in coral reef ecology for more than 20 years. Alternative stable state theory predicts that these changes are reversible but, to date, there is little indication of this having occurred. Here we present evidence of the initiation of such a reversal in Jamaica, where shallow reefs at five sites along 8 km of coastline now are characterized by a sea urchin-grazed zone with a mean width of 60 m. In comparison to the seaward algal zone, macroalgae are rare in the urchin zone, where the density of Diadema antillarum is 10 times higher and the density of juvenile corals is up to 11 times higher. These densities are close to those recorded in the late 1970s and early 1980s and are in striking contrast to the decade-long recruitment failure for both Diadema and scleractinians. If these trends continue and expand spatially, reefs throughout the Caribbean may again become dominated by corals and algal turf.Keywords
This publication has 33 references indexed in Scilit:
- Patterns in the distribution of juvenile corals and coral reef community structure in St. John, US Virgin IslandsMarine Ecology Progress Series, 2000
- Climate change, coral bleaching and the future of the world's coral reefsMarine and Freshwater Research, 1999
- Coral‐Seaweed‐Grazer‐Nutrient Interactions on Temperate ReefsEcological Monographs, 1996
- The importance of sampling scale in ecology:kilometer-wide variation in coral reef communitiesMarine Ecology Progress Series, 1996
- Thresholds and Multiple Stable States in Coral Reef Community DynamicsAmerican Zoologist, 1992
- MASS MORTALITY OF DIADEMA ANTILLARUM IN THE CARIBBEAN: What Have We Learned?Annual Review of Ecology and Systematics, 1988
- Early maximum growth of stony corals (Scleractinia) after settlement on artificial substrata on a Caribbean reefMarine Ecology Progress Series, 1988
- Population Dynamics and Life Histories of Foliaceous CoralsEcological Monographs, 1985
- Life histories and abundance patterns of colonial corals on Jamaican reefsMarine Ecology Progress Series, 1983
- Do Corals Lie About Their Age? Some Demographic Consequences of Partial Mortality, Fission, and FusionScience, 1980