Nom du corpus

Corpus Systématique Animale

Titre du document

Mass mortality of Diadema antillarum

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Echinodermes_v2b_0073
Auteur(s)
  • R. C. Carpenter
Affiliation(s)
  • Department of Biology, California State University, 91330, Northridge, California, USA
Résumé

The mass mortality of the echinoidDiadema antillarum Philippi in 1983/1984 resulted in dramatic changes in the benthic algal community. This study reports data on the population densities of sea urchins prior to and following the mass mortality and data on the biomass, species composition, and rates of primary productivity of algal communities at several study sites in St. Croix, U.S. Virgin Islands. The mass mortality reducedD. antillarum population densities by 95 to 99%. Population densities were reduced further by a second, less severe mortality event in October 1985. Over a period of 2 yr, recruitment ofD. antillarum larvae to the study sites was low and population densities remained at 2 to 30% of their premortality levels. The effects of the mass mortality on the algal community were significant. Algal biomass increased by 22 to 439% across reef zones 16 mo after the die-off. Rates of primary productivity per unit biomass (chlorophylla) remained at approximately 60% of premortality levels in shallow-reef habitats for 25 mo following the die-off. The magnitude of the response of the algal community was positively correlated with the previous population densities ofD. antillarum. The species composition of the algal community also shifted dramatically. Prior to the mass mortality, algal communities were dominated by algal turfs and crustose algae, and macroalgae were either rare or absent. Twenty-five months after the mass mortality, algal turfs covered 40% of the area and macroalgae covered 47%. Many of the macroalgal species are not consumed by herbivores and much of the algae is dislodged by storm waves and is exported from the reef. This represents a transition from a community dominated by a grazing-based food web to one where the majority of primary production may be exported to adjacent communities.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - invertebres
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
Identifiant ISTEX
8DACCFBD5C974BC6A05A85BD016ED2FE617FDDEC
Revue

Marine Biology

Année de publication
1990
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
10
Sous-corpus
  • Echinodermes
Type de publication
Journal
ark:/67375/1BB-213H421T-G
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