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Marine Biology

, Volume 38, Issue 2, pp 129–145 | Cite as

On the ecology of a North Adriatic benthic community: Distribution, standing crop and composition of the macrobenthos

  • K. Fedra
  • E. M. Ölscher
  • C. Scherübel
  • M. Stachowitsch
  • R. S. Wurzian
Article

Abstract

The boundaries as well as the macro-epibenthic biomass distribution and composition of a North Adriatic benthic community, dominated by the brittle star Ophiothrix quinquemaculata (D.Ch.), the sponges Reniera ssp., and the ascidians Microcosmus ssp. were determined. Transects totalling more than 80 km (i.e., a recorded area of approximately 150 000 m2) were taken by means of a combined TV- and photocamera sled. The observations, TV-recordings, and photos, together with 392 diver-collected quantitative samples were evaluated. The biomass values were used to establish isobenths. Within the community, the mean biomass, measured as wet weight, amounted to 370 (±73) g/m2 with maxima of more than 1000 g/m2. 64% of the biomass was due to the designating group Ophiothrix-Reniera-Micrcosmus, 87.5% were represented by filter- and suspension-feeding species alone. The mean biomass in the peripheral areas was evaluated at 166 (±62) g/m2. Biomass distribution and composition is examined, and the ecological function and meaning of the observed patterns is discussed.

Keywords

Biomass Brittle Sponge Benthic Community Standing Crop 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • K. Fedra
    • 1
  • E. M. Ölscher
    • 1
  • C. Scherübel
    • 1
  • M. Stachowitsch
    • 1
  • R. S. Wurzian
    • 1
  1. 1.I. Zoologisches Institut, Lehrkanzel für MeeresbiologieUniversity of ViennaAustria

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