Keywords
population recovery
black sea urchin
mass mortality
Caribbean
Puerto Rico
Diadema antillarum
recuperación de la población
erizo negro de mar
mortalidad masiva
Caribe
Puerto Rico
How to Cite
Abstract
Recent reports indicate that populations of the black sea urchin Diadema antillarum are slowly coming back in several localities in the Caribbean after 15 years of absence. In La Parguera, Puerto Rico, urchins were totally absent from reef localities until 1996, when isolated, medium size individuals were observed in shallow reef habitats. To assess the status (distribution, densities and size structure) of populations of D. antillarum 17 years after the die-off, twelve 20 m² (10 x 2 m) band transects in each of four depth interval (0-3, 3-7, 7-11 and >11m) in each of four fringing coral reefs, and six-eight band-transects in each of two depth intervals (0-3 and > 3m) in three lagoonal mounds were surveyed in 2001. All urchins present in the band transects in two depth intervals (0-3 and 3-8 m) were collected and measured (test diameter) in situ to determine the average size and size (age) structure of populations. Overall, average densities were low and not significantly different (F=1.29, p= 0.125) across reef sites (0.83-1.39 ind/m²) and the seagrass mounds (1.09 ± 0.6-1.30 ± 0.6 ind/m²). Urchins were only found in the shallow areas (<3 m) on the seagrass mounds where they formed tight aggregations during daytime. Densities decreased significantly with increasing depth (r2 = -0.60) in reef sites and were significantly higher (F= 5.97, p<0.001) in shallow reef platforms (0.89 ± 0.69 – 1.98 ± 0.65 ind/m²) (0-3m), and the upper fore-reef (0.56 ± 0.14 – 2.33 ± 1.1 ind/m²) habitats (3-7m), compared to deeper (>7m) habitats (0.01 ± 0.02 – 0.88 ± 1.06 ind/m²). Enrique reef had a significantly higher (K-W, H= 165.19, p<0.001) population average size (Median= 7.7) compared to all other sites. Populations in the sea grass mounds were dominated by midsize to large individuals. Within reefs, the average size did not vary significantly across depth intervals with medium to large size urchins dominating. Higher number of aggregations and higher number of urchins per aggregation were correlated with low complexity (rugosity) habitats (Pearson’s r= -0.772, p<0.001 and r= -0.778, p<0.001 respectively), which supports the idea that this behavior provides protection. Although average densities were well below pre-mass-mortality densities in Puerto Rico, results of this study indicate that Diadema seem to be making a slow come back in La Parguera. Rev. Biol. Trop. 53(Suppl. 3): 219-231. Epub 2006 Jan 30.References
Bak R.P.M., M.J.E. Carpay and E.D. de Ruyter van Steveninck. 1984. Densities of the sea urchin Diadema antillarum before and after mass mortalities on the coral reefs of Curacao. Mar. Ecol. Prog. Ser. 177: 105-108.
Bauer J.C. 1980. Observations on geographical variations in population density of the echinoid Diadema antillarum within the western North Atlantic. Bull. Mar. Sci. 30: 509-515.
Bauer J.C. and A.C. Agerter. 1987. Isolation of bacteria pathogenic for the sea urchin Diadema antillarum (Echinodermata: Echinoidea). Bull. Mar. Sci. 40: 161-165.
Bellwood D.R., T.P. Hughes, C. Folke and M.Nyström. 2004. Confronting the coral reef crisis. Nature 149: 827-833.
Bunkley-Williams L., E.H. Williams Jr., and A.G.Bunkley Jr. 1986. Isolated mortalities of the sea urchins Astropyga magnifica and Eucidaris tribuloides in Puerto Rico. Bull. Mar. Sci. 38: 391-393.
Carpenter R.C. 1981. Grazing by Diadema antillarum (Philippi) and its effects on the benthic algal community. J. Mar. Res. 39: 749-765.
Carpenter R.C. 1984. Predator and population density control of homing behavior in the Caribbean echinoid Diadema antillarum. Mar. Biol. 82: 101-108.
Carpenter R.C. 1985. Sea urchin mass mortality: effects on reef algal abundance, species composition, and metabolism and other coral reef herbivores. Proc. 5th Int. Coral Reef Congress. 4: 53-60.
Carpenter R.C. 1990. Mass mortality of Diadema antillarum. I. Long-term effects on sea urchin population- dynamics and coral reef algal communities. Mar. Biol. 104: 67-77.
Chiappone M., Swanson, D.W., Miller, S.L. & S.G. Smith. 2002. Large scale surveys on the Florida Reef Tract indicate poor recovery of the long-spined sea urchin Diadema antillarum. Coral Reefs 21: 155-159.
Craft L.L. 1975. Aspects of the biology of the crab Percnon gibbesi (Milne Edwards) and its commensal association with the sea urchin Diadema antillarum Phillipi. M.S. Thesis, University of Puerto Rico. Mayagüez, Puerto Rico, USA.
Edmunds P.J. & R.C., Carpenter.2001. Recovery of Diadema antillarum reduces macroalgal cover and increases abundance of juvenile corals on a Caribbean reef. www.pnas.org/cgi/doi/10.1073/pnas.071524598. April 24, 2001.
Forcucci D. 1994. Population density, recruitment and 1991 mortality event of Diadema antillarum in the Florida keys. Bull. Mar. Sci. 54: 917-928.
Glynn P.W. 1968. Mass mortalities of echinoids and other reef flat organisms coincident with mid-day, low water exposures in Puerto Rico. Mar. Biol. 1: 226-243.
Haley M.P. & J.L. Solandt, 2001. Population fluctuations of the Sea Urchins Diadema antillarum and Tripneustes ventricosus at Discovery Bay, Jamaica: a case of biological succession? Caribbean Journal of Science 37: 239-245.
Hay M.E. 1984. Patterns of fish and urchin grazing on Caribbean coral reefs: are previous results typical? Ecology 65: 446-454.
Hughes T.P. 1994. Catastrophes, phase shifts and large scale degradation of a Caribbean coral reef. Science 265: 1547-1551.
Hughes T.P. 1989. Community structure and diversity of coral reefs: the role of history. Ecology 70: 275-279.
Hughes T.P., B.D. Keller, J.B.C. Jackson & M.J. Boyle. 1985. Mass mortality of the Echinoid Diadema antillarum Philippi in Jamaica. Bull. Mar. Sci. 36: 377-84.
Hughes T.P., D.C. Reed & M.J. Boyle. 1987. Herbivory on coral reefs: community structure following mass mortalities of sea urchins. J. Exp. Mar. Biol. Ecol. 113: 39-59.
Hunte W. & D.Younglao. 1988. Recruitment and population recovery of Diadema antillarum (Echinodermata; Echinoidea) in Barbados. Mar. Ecol. Prog. Ser. 45: 109-119.
Hunte W., I. Côté & T. Tomascik. 1986. On the dynamics of the mass mortality of Diadema antillarum in Barbados. Coral Reefs 4: 135-139.
Hunter I.G. 1977. Sediment production by Diadema antillarum on a Barbados fringing reef. Proc. 3rd Int. Coral Reef Symp. 1: 105 –109.
Jackson J.B.C. & K.W. Kaufmann. 1987. Diadema antillarum was not a keystone predator in cryptic reef environments. Science 235: 687-689.
Karlson R.H. & D.R. Levitan.1990. Recruitment-limitation in open population of Diadema antillarum: an evaluation. Oecologia 84:40-44
Laydoo R. 1984. Recent Mass Mortality of the Sea Urchin Diadema antillarum populations in Tobago, West Indies. Pres. Ann. Meet. Assoc. Island. Mar. Lab. Caribb., 18th Trinidad.
Lessios H.A., J.D.Cubit, R.D. Robertson, M.J. Shulman,, M.R.Parker, S.D. Garrity & S.C. Levings. 1984a. Mass mortality of Diadema antillarum on the Caribbean coast of Panama. Coral Reefs 3: 173-182.
Lessios H.A., D.R. Robertson & J.D. Cubit. 1984b. Spread of Diadema mass mortality through the Caribbean. Science 226: 335-337
Lessios H.A. 1988. Mass mortality of Diadema antillarum in the Caribbean: What have we learned? Ann. Rev. Ecol. Syst. 19: 371-393.
Levitan D.R. 1988. Density-dependent size regulation and negative growth in the sea urchin Diadema antillarum Philippi. Oecologia 76: 627-629.
Lewis S.M. & P.C. Wainwright. PC.1985. Herbivore Abundance and Grazing Intensity on a Caribbean Coral Reef. J. Mar. Biol. Ecol. 7: 215-288.
Liddell W.D. & S.L. Ohlhorst. 1986. Changes in benthic community composition following the mass mortality of Diadema at Jamaica. J. Exp. Mar. Biol. Ecol. 95: 271-278.
Miller R.J., A.J. Adams, N.B. Ogden, J.C. Ogden & J.P. Ebersole 2003. Diadema antillarum 17 years after mass mortality: is recovery beginning on St. Croix? Coral Reefs 22: 181-187.
Mortesen T. 1940. A monograph on the Echinoidea. 3 (1-2) Aulodonta (with additions to vol. 2): 1-370, 1-22. CA Reitzel, Copenhagen.
Moses C.S. & R.M. Bonem. 2001. Recent population dynamics of Diadema antillarum and Tripneustes ventricosus along the north coast of Jamaica, W.I. Bull. Mar. Sci. 68: 327-336.
Ogden J.C. 1976. Some aspects of herbivore-plant relationships on Caribbean reefs and seagrass beds. Aq. Bot. 2: 103-116.
Ogden J.C. 1977. Carbonate-sediment production by parrot fish and sea urchins on Caribbean reefs. Studies in Geology 4: 281-288.
Ogden J.C., R.A. Brown & N. Salesky. 1973. Grazing by the echinoid Diadema antillarum Philippi: formation of halos around West Indian patch reefs. Science 182: 715-71.
Ogden J.C. and P.S. Lobel. 1978. The role of herbivorous fishes and urchins in coral reef communities. Env. Bio. Fish 3: 49-63.
Pearse J.S. 1974. Reproductive patterns of tropical reef animals: three species of sea urchins. Proc. 2nd Int. Coral Reef Symp. 1: 235-240.
Randall J.E., R.E. Schroeder & W.A. Starck II. 1964. Notes on the biology of the echinoid Diadema antillarum. Carib. J. Sci. 4: 421-433.
Rivera J.A. & V.P. Vicente. 1976. Diadema antillarum (Philippi): Enhancement of coral species in Thalassia beds. Proc. Assoc. Is. Mar. Lab. Carib. 12:18.
Robertson D.R. 1991. Increases in surgeonfish populations after mass mortality of the sea urchin Diadema antillarum in Panama indicates food limitation. Mar. Biol. 111: 437-444.
Sammarco P.W. 1972. Some aspects of the ecology of Diadema antillarum Philippi: food preferences and effect of grazing. Special problems report to the West Indies Lab. of Fairlaigh Dickinson University, St. Croix: 1-47.
Sammarco P.W. 1980. Diadema and its relationship to coral spat mortality: grazing competition and biological disturbance. J. Mar. Res. 32: 254-272.
Sammarco P.W. 1982. Effects of grazing by Diadema antillarum Philippi on algal diversity and community structure. J. Exp. Mar. Biol. Ecol. 65: 83-105.
Sammarco P.W., J.S Levinton & J.C. Ogden. 1974. Grazing and control of coral reef community structure by Diadema antillarum Philippi (Echinodermata: Echinoidea):A preliminary study. J. Mar. Res 32: 47-53.
Scoffin T.P., G.W. Stearn, D. Boucher, P. Fridl, G.W. Mocokins, J.G. Hunter & J.K. McGeachy. 1980. Calcium carbonate budget of a fringing reef on the west coast of Barbados. Part II. Erosion, sediment and internal structure. Bull.Mar.Sci. 30: 475-508.
Solandt J.L. & A.C. Campbell 2001. Macroalgal feeding characteristics of the sea urchin Diadema antillarum Phillipi at Discovery Bay, Jamaica. Carib. J. Sci. 37: 227-238.
Stearn G.W., T.P. Scoffin & P.W. Martindale. 1977. Calcium carbonate budget of a fringing reef on the west coast of Barbados. Part I. Zonation and productivity. Bull. Mar.Sci. 27: 473-510.
Vicente V.P. & J.A. Rivera. 1982. Depth limits of the seagrass Thalassia testudinum (Konig) in Jobos and Guayanilla bays, Puerto Rico. Carib. J. Sci. 17: 73-79.
Vicente V.P. & C. Goenaga. 1984. Mortandades masivas del erizo de mar Diadema antillarum (Philippi) en Puerto Rico. Centro para Estudios Energéticos y Ambientales, Div. Ecología Marina, Univ. Puerto Rico. Reporte CEER-M-195. 30 p.
Weil E. 1980. Papel del erizo negro Diadema antillarum (Philippi) en la regulación de la estructura comunitaria de algunos arrecifes del Parque Nacional Morrocoy, Venezuela. Tésis, Universidad Central de Venezuela, 180 p.
Weil E., F. Losada & D. Bone.1984. Spatial variations in density and size of the echinoid Diadema antillarum Philippi on some Venezuelan coral reefs. Bijdragen tot de Dierkunde. 54: 73-82.
Williams E.H. Jr. 1991. Threat to black sea urchins. Nature 352: 385.
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