The effects of seasonal and hydrological influences on the macroinvertebrates of the Rhone River, France 1. Methodological aspects

Graphic multiple-regression analysis demonstrated the influence of 5 environmental variables (2 seasonal and 3 hydraulic) on the macroinvertebrates of the Rhône River at Lyon. Interactions between flow rate and season are demonstrated by fauna classification, which defines the seasonal and aperiodic taxa through simple and multiple regression of values, which represent 62 taxa.