ecological imbalance

https://doi.org/10.1351/goldbook.14614
Change in any biological, physical, or chemical components of an ecosystem, or in their interactions, which result in change in ecological character and its functions and attributes.
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 872 [Terms] [Paper]