Assessing coastal benthic macrofauna community condition using best professional judgement--developing consensus across North America and Europe.
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.
Teixeira
Heliana
H
IMAR, Institute of Marine Research, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal. helianateixeira@ci.uc.pt
Borja
Angel
A
Weisberg
Stephen B
SB
Ranasinghe
J Ananda
JA
Cadien
Donald B
DB
Dauer
Daniel M
DM
Dauvin
Jean-Claude
JC
Degraer
Steven
S
Diaz
Robert J
RJ
Grémare
Antoine
A
Karakassis
Ioannis
I
Llansó
Roberto J
RJ
Lovell
Lawrence L
LL
Marques
João C
JC
Montagne
David E
DE
Occhipinti-Ambrogi
Anna
A
Rosenberg
Rutger
R
Sardá
Rafael
R
Schaffner
Linda C
LC
Velarde
Ronald G
RG
D000818:Animals; D017753:Ecosystem; D004784:Environmental Monitoring / Q000592:standards*; D005060:Europe; D019015:Geologic Sediments; D009656:North America; D009792:Oceans and Seas; D014876:Water Pollution