Nom du corpus

Corpus Systématique Végétale

Titre du document

A quantitative scuba-diving survey of the sublittoral macrobenthos at subantarctic Marion Island

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Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Syst_veg6_v2_019074
Auteur(s)
  • Lynnath E. Beckley 1
  • George M. Branch 1
Affiliation(s)
  • 1) Marine Biology Research Institute, Zoology Department, University of Cape Town, 7700, Rondebosch, South Africa
Résumé

A SCUBA-diving survey of the macrobenthos of hard substrata in the sublittoral zone at subantarctic Marion Island was conducted during March and April 1988. Dense beds (12 kg m−2) of the kelp Macrocystis laevis occur in depths > 5 m. Durvillaea antarctica is found along the infralittoral fringe and Desmarestia rossi and Durvillaea sp. occur in a narrow zone from 3 m–6 m. Under-storey algae (chiefly rhodophytes) tend to decrease in biomass with depth, with mean values of 1.57 kg m−2 at 5m, 0.75 kg m−2 at 10m and 0.49 kg m−2 at 15 m. Encrusting coralline algae are particularly abundant in shallow areas (¯x = 0.92 kg m−2) but are insignificant in deeper areas. Total biomass of macrozoobenthos increased with depth with mean values of 0.12 kg m−2 at 5 m, 0.34 kg m−2 at 10 m and 0.46 kg m−2 at 15 m. Polychaetes, crustaceans, echinoderms, molluscs, sponges and bryozoans dominated the macrozoobenthos in terms of biomass. Approximately 200 species of macrobenthic animals were recorded and numerically, polychaetes, crustaceans, molluscs, nematodes and echinoderms dominated. The sublittoral benthos at Marion Island is compared with that occurring at other subantarctic and Antarctic islands, in particular, the Kerguelen Island group. Zoogeographic trends and the possible effects of nutrient input from seabird guano are briefly discussed.

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 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - General Agricultural and Biological Sciences
Catégories WoS
  • 1 - science ; 2 - ecology
  • 1 - science ; 2 - biodiversity conservation
Identifiant ISTEX
C4BA4BE9D0C166ACFEB84FD24D545B1776856020
Revue

Polar Biology

Année de publication
1992
Présence de XML structuré
Non
Score qualité du texte
9.58
Version PDF
1.3
Type de publication
Journal
ark:/67375/1BB-0HB6P095-8
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