Calculation of species sensitivity values and their precision in marine benthic faunal quality indices.

Mar Pollut Bull

Marine Monitoring AB, Strandvägen 9, SE-453 30 Lysekil, Sweden; Department of Biology and Environmental Science - Kristineberg, University of Gothenburg, SE-451 78 Fiskebäckskil, Sweden.

Published: April 2015

A challenging aspect of benthic quality indices used for assessing the marine environment has been to compile reliable measures of the species' sensitivity to disturbances. Sensitivity values and their uncertainties can be calculated, but a problem to cope with is that the results may depend on the actual proportion of samples from disturbed and undisturbed environments. Here we calculated sensitivity values for each species along an artificial disturbance gradient created by bootstrapping varying numbers of samples from disturbed and undisturbed environments. The values were increasing, decreasing, or more or less constant along this gradient. The lowest value with the lowest uncertainty was adopted as the species sensitivity value. Analyses of the uncertainties indicated that the accuracy rather than the precision might be a concern. We suggest a method to exclude species for which the uncertainty is outside predefined limits as a precaution to reduce bias in the environmental status classification.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.marpolbul.2015.02.010DOI Listing

Publication Analysis

Top Keywords

sensitivity values
12
species sensitivity
8
quality indices
8
samples disturbed
8
disturbed undisturbed
8
undisturbed environments
8
sensitivity
5
calculation species
4
values
4
values precision
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!