Definitions for "Ecological integrity"
The ability of the aquatic ecosystem to support and maintain key ecological processes and a community of organisms with a species composition, diversity and functional organisation as comparable as possible to that of natural habitats within a region ( Schofield & Davies 1996).
the condition of an ecosystem where, a) the structure and function are unimpaired by human-caused stresses; and b) the ecosystem biological diversity and supporting processes are likely to persist. (from Parks Canada, State of the Parks 1997 Report).
The condition of an unimpaired ecosystem as measured by combined chemical, physical (including physical habitat), and biological attributes.
A living system exhibits integrity if, when subjected to disturbance, it sustains and organizes self-correcting ability to recover toward a biomass end-state that is normal for that system. End-states other than the pristine or naturally whole may be accepted as normal and good.