Environmental Monitoring and Assessment

, Volume 81, Issue 1, pp 187–197

An Approach for Identifying the Causes of Benthic Degradation in Chesapeake Bay

  • Cory S. Christman
  • Daniel M. Dauer

DOI: 10.1023/A:1021381125407

Cite this article as:
Christman, C.S. & Dauer, D.M. Environ Monit Assess (2003) 81: 187. doi:10.1023/A:1021381125407


We developed an index to differentiate between low dissolved oxygen effects and sediment contamination effects for sites classified as degraded by the Chesapeake Bay Benthic Index of Biotic Integrity (B-IBI), using discriminant analysis. We tested 126 metrics for differences between sites with low dissolved oxygen and sites with contaminated sediments. A total of 16 benthic community metrics met the variable selection criteria and were used to develop a discriminant function that classified degraded sites into one of two stress groups. The resulting discriminant function correctly classified 77% of the low dissolved oxygen sites and 80% of the contaminated sites in the validation data.

discriminant analysisindex of biotic integrityChesapeake Baysediment contaminationlow dissolved oxygenmacrobenthos

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Cory S. Christman
    • 1
  • Daniel M. Dauer
    • 1
  1. 1.Department of Biological SciencesOld Dominion UniversityNorfolk