new jersey department of environmental protection  
Water Monitoring & Standards
njdep home about dep index by topic programs and units dep online

Metric 6

Proportion of Individuals as Generalists


This metric replaces the omnivore metric used in the original IBI (Karr 1981). Use of the

omnivore metric was determined to be inapropriate in New Jersey because omnivores

are naturally depauperate. Generalists, as defined here, are species with flexible feeding

strategies and broad habitat requirements. Often a shift from predominantly specialist groups

to generalists groups occurs as water quality becomes degraded (Leonard and Orth 1986); Ohio

EPA 1987). Due to broad feeding and habitat requirements, species included for use in this

metric are considered tolerant of environmental degradation.

contact us privacy notice legal statement


home: water monitoring and standards home

department: njdep home | about dep | index by topic | programs/units | dep online
statewide: njhome | my new jersey | people | business | government | departments | search

Copyright © State of New Jersey, 1996-2013
Department of Environmental Protection
P. O. Box 402
Trenton, NJ 08625-0402

Last Updated: May 29, 2009

njdep homeabout depindex by topicprograms and unitsdep online nj homemy new jerseynj peoplenj businessnj governmentdepartments