title: Assessing coastal benthic macrofauna community condition using best professional judgement--developing consensus across North America and Europe.
abstract: Benthic indices are typically developed independently by habitat, making their incorporation into large geographic scale assessments potentially problematic because of scaling inequities. A potential solution is to establish common scaling using expert best professional judgment (BPJ). To test if experts from different geographies agree on condition assessment, sixteen experts from four regions in USA and Europe were provided species-abundance data for twelve sites per region. They ranked samples from best to worst condition and classified samples into four condition (quality) categories. Site rankings were highly correlated among experts, regardless of whether they were assessing samples from their home region. There was also good agreement on condition category, though agreement was better for samples at extremes of the disturbance gradient. The absence of regional bias suggests that expert judgment is a viable means for establishing a uniform scale to calibrate indices consistently across geographic regions.
authors.affiliation: IMAR, Institute of Marine Research, 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: Angel
authors.initials: A
authors.lastname: Borja
authors.forename: Stephen B
authors.initials: SB
authors.lastname: Weisberg
authors.forename: J Ananda
authors.initials: JA
authors.lastname: Ranasinghe
authors.forename: Donald B
authors.initials: DB
authors.lastname: Cadien
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Dauer
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Dauvin
authors.forename: Steven
authors.initials: S
authors.lastname: Degraer
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Diaz
authors.forename: Antoine
authors.initials: A
authors.lastname: Grémare
authors.forename: Ioannis
authors.initials: I
authors.lastname: Karakassis
authors.forename: Roberto J
authors.initials: RJ
authors.lastname: Llansó
authors.forename: Lawrence L
authors.initials: LL
authors.lastname: Lovell
authors.forename: João C
authors.initials: JC
authors.lastname: Marques
authors.forename: David E
authors.initials: DE
authors.lastname: Montagne
authors.forename: Anna
authors.initials: A
authors.lastname: Occhipinti-Ambrogi
authors.forename: Rutger
authors.initials: R
authors.lastname: Rosenberg
authors.forename: Rafael
authors.initials: R
authors.lastname: Sardá
authors.forename: Linda C
authors.initials: LC
authors.lastname: Schaffner
authors.forename: Ronald G
authors.initials: RG
authors.lastname: Velarde
mesh_terms: D000818:Animals; D017753:Ecosystem; D004784:Environmental Monitoring / Q000592:standards*; D005060:Europe; D019015:Geologic Sediments; D009656:North America; D009792:Oceans and Seas; D014876:Water Pollution