Nematodes are the most widespread multicellular animals in nature and analysis of nematodes in terrestrial, freshwater and marine environments, as well as their role and function in ecosystems, can be used for environmental biomonitoring. This new edition addresses pertinent environmental issues, for example climate change and work across large spatial scales, and how these are reflected onto nematode communities. It also discusses how nematode communities may be utilised to gain relevant knowledge to mitigate the effects of these threats. Other new topics include: -Nematodes as indicators of sustainable agriculture -Nematodes in extreme environments -Novel nematode identification approaches using image analysis and machine learning -Nematodes and environmental policy -Environmental nematology education -Recommended protocols for nematode sampling and subsequent analyses. This book provides a hands-on approach suitable for readers who wish to embark and carry out practical work in environmental nematology for the first time, and for more experienced researchers. It is suitable for nematologists, soil and aquatic ecologists, agronomists and environmental scientists.