continuous effect

https://doi.org/10.1351/goldbook.14550
Change that can be measured on a continuum from zero (or even a negative value) to positive values such as growth and reproduction.
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 861 [Terms] [Paper]