Filtering processing of volumes of water and filtering out food v. Collecting active collection of food particulates from water column vi. Grazing consumption of periphyton vii. Scraping collection of periphyton, detritus and bacteria on surface of rocks and other surfaces viii. Integrators of the aquatic environment 1. Living and incorporating all aspects of the environment 2.
Chemistry only gives snapshots of conditions ii.
Most sensitive groups of invertebrates 2. Stoneflies as a group most sensitive followed by caddisflies and then mayflies 3. Calculations based on abundance of EPT 4.