title: Quality assessment of benthic macroinvertebrates under the scope of WFD using BAT, the Benthic Assessment Tool.
abstract: Assessing the health of ecosystems has become a focal point among researchers worldwide. Recently, the European Water Framework Directive intensified the development of approaches to assess ecosystems' ecological quality. The Benthic Assessment Tool (BAT) is a multimetric approach to evaluate condition of subtidal soft bottom macroinvertebrates of coastal and transitional waters. The effects of anthropogenic disturbances on benthic macroinvertebrate communities, from 1990 to 2006, allowed testing BAT performance in Mondego estuary (Portugal). The method was able to detect decrease on ecological quality, induced essentially by eutrophication and physical disturbances, and follow communities' subsequent recovery. It evidenced, nevertheless, some limitations associated with the unstable nature of estuaries. The ecological classification of key species in the community and the balance expected between ecological groups of estuarine communities had great influence in the final ecological assessment. Shortcomings of the method were discussed in the light of its suitability for assessing transitional waters' condition.
authors.affiliation: IMAR - Institute of Marine Research, c/o Department of Zoology, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal. helianateixeira@ci.uc.pt
authors.forename: Heliana
authors.initials: H
authors.lastname: Teixeira
authors.forename: João
authors.initials: J
authors.lastname: Magalhães Neto
authors.forename: Joana
authors.initials: J
authors.lastname: Patrício
authors.forename: Helena
authors.initials: H
authors.lastname: Veríssimo
authors.forename: Rute
authors.initials: R
authors.lastname: Pinto
authors.forename: Fuensanta
authors.initials: F
authors.lastname: Salas
authors.forename: João Carlos
authors.initials: JC
authors.lastname: Marques
mesh_terms: D000818:Animals; D001267:Atlantic Ocean; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods* / Q000706:statistics & numerical data*; D007448:Invertebrates / Q000502:physiology*; D011157:Population Dynamics; D011174:Portugal; D013045:Species Specificity; D018709:Statistics, Nonparametric; D014872:Water Movements