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Measuring the impact degree of different pressure types with the Benthic Ecosystem Quality Index (BEQI) [Poster]

Authors
Publication Date
Keywords
  • Alien Species
  • Benthos
  • Disposal (Waste)
  • Dredging
  • Eutrophication
  • Indicators
Disciplines
  • Chemistry

Abstract

Measuring the impact degree of different pressure types with the Benthic Ecosystem Quality Index (BEQI). ICES CM 2010/H:25 EU Framework Directives (marine environment) • Water Framework Directive • Marine Strategy Directive • Habitat and Bird Directives Evaluation of the environment • Impact assessment • Physical disturbance (fisheries, sand extraction, dredging) • Pollution (chemicals, nutrients) • Construction works (harbours wind farms, coastal defense) • Recovery assessment Benthic Ecosystem Quality index (BEQI) • Benthic indicator tool • Scaled the deviation between control and impact data in 5 classes • Sampling effort based • Evaluate benthic parameters: density, biomass, number of species, similarity (species composition) Measuring the impact degree of different pressure types with the Benthic Ecosystem Quality Index (BEQI) H:25 CONCLUSION  Indicators are evidence based tools which can be used for the evaluation of anthropogenic impacts in marine systems.  The BEQI indicator tool is capable of measuring the impact degree of different pressure types. The different BEQI parameters combined in the tool, however, may react differently (the degree of impact) on exerted pressures. Gert Van Hoey1, Tom Ysebaert2 and Kris Hostens1 Institute for Agricultural and Fisheries Research, Animal Sciences – Fisheries ILVO, Biological Environmental Research, Ankerstraat 1, 8400 Oostende, Belgium  +32(0)59/569 847 [email protected] Dumping of dredged material (BE) www.beqi.eu The need for adequate control/reference areas Sampling strategy spatially and temporally adapted to impact type Biological assessment has to coincide with detailed knowledge on impact frequency and intensity Indicators summarize patterns, but they do not provide full explanations of observed patterns Impact assessment: Points of attention !! MEASURING IMPACT DEGREES: CASE STUDIES Organic enrichment (Lake Veere, NL) Alien species (Ensis

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