Application of the bentix index in assessing ecological quality of hard substrata: a case study from the Bosphorus Strait, Turkey

Kalkan E., Karhan S. U., Mutlu E., Simboura N., Bekbolet M.

MEDITERRANEAN MARINE SCIENCE, vol.8, no.1, pp.15-29, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 1
  • Publication Date: 2007
  • Doi Number: 10.12681/mms.160
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Veterinary Science Database, Directory of Open Access Journals
  • Page Numbers: pp.15-29
  • Istanbul University Affiliated: Yes


In this paper, a biotic index (Bentix) has been used for the assessment of ecological quality status of shallow water hard substrate benthic ecosystems affected by coastal sewage discharges in the Bosphorus Strait. A significant difference was observed between the control and the discharge stations with regard to Bentix values (Mann-Whitney U Test, p=0.002) and ecological quality status of the discharge stations was worse than that of controls. The index values revealed that sewage discharges caused serious disturbance in macrozoobenthic communities in the area investigated. Although so far it has been used for soft bottom communities., Ben fix (with some species scoring modifications) also appeared to work successfully in hard substrates, at least for the present study.