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Soft-bottom macrozoobenthos of the southern part of the Gulf of Trieste: faunistic, biocoenotic and ecological survey
Mavric, B.; Orlando-Bonaca, M.; Bettoso, N.; Lipej, L. (2010). Soft-bottom macrozoobenthos of the southern part of the Gulf of Trieste: faunistic, biocoenotic and ecological survey. Acta Adriat. 51(2): 203-216
In: Acta Adriatica. Institute of Oceanography and Fisheries: Split. ISSN 0001-5113; e-ISSN 1846-0453, more
Peer reviewed article  

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Keyword
    Marine
Author keywords
    Macrozoobenthos; soft-bottom; biocoenoses; ecological aspects; Gulf of Trieste

Authors  Top 
  • Mavric, B.
  • Orlando-Bonaca, M., more
  • Bettoso, N.
  • Lipej, L.

Abstract
    A faunistic, biocoenotic and ecological survey of soft-bottom macrozoobenthic communities was carried out for the southern part of the Gulf of Trieste on the basis of samplings in 2005 and 2006. At 28 sampled stations a total of 14595 specimens belonging to 306 animal taxa were identified. The most abundant species were Capitella capitata, Lumbrineris gracilis, heteromastus filiformis, Corbula gibba and Tellina distorta. The highest relative species abundance in all water bodies was close to 15%. The dominant species confirmed that the environment of the Gulf of Trieste is unstable. This environmental instability could also explain the rather high values of AMBI. The MDS analysis and other applied indices indicated that there were no statistically significant differences between water bodies. The values for Shannon-Wiener diversity index (H’) and Pielou’s index (J’) were among the highest ever recorded for the soft-bottom assemblages of the Gulf of Trieste. The analysis of benthic biocoenoses revealed that the sampling area is a boundary between infra- and circalittoral belts, which could explain the very high species richness.

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