Indicators (Biology) Environmental monitoring 2 Freshwater algae 2 Animal Ecology 1 Bacteria 1 Biological indicators 1 Bivalvia-Effect of water pollution on 1 Caenorhabditis elegans 1 Escherichia 1 Free living nematodes 1 Freshwater mussels-Effect of water pollution on 1 Marine algae 1 Marine ecology 1 Marine pollution 1 Nematoda 1 Nematodes 1 Rhabditida 1 SCIENCE / Life Sciences / Zoology / General 1 Sanitary microbiology 1 Techniques and Methodology 1 Water 1 Water pollution 1 Water quality 1 Water quality bioassay 1