The core of GLOBIO-Aquatic is a set of empirical relationships between environmental drivers and biodiversity. For every combination of drivers and water type included, the model contains a regression equation, linking the intensity of the pressure to the impact on biodiversity. The impact is captured in terms of the biodiversity indicator MSA: the mean abundance of original species, compared to the undisturbed situation. The effects of drivers are described separately for rivers, lakes and wetlands.
The GLOBIO regression equations are based on nearly 100 peer reviewed references on the response of species to change in the environment, i.e. the drivers.