Biosurvey Protocols
Biosurvey protocols have been published for use in different waterbody types and ecoregions. One such publication is the Rapid Bioassessment Protocol for streams and rivers, issued by the U.S. Environmental Protection Agency (EPA). Such protocols provide a structure for developing an IBI, which may include measures such as richness of taxa (species, genera, etc.) and proportion of pollution-tolerant or intolerant taxa.
Read more about this topic: Index Of Biological Integrity