Consulting and contracting services for lakes, streams, and wetlands. Southeastern U.S.A.

Consultancy and research; site has several technical papers on topics in aquatic ecology, water management, and river restoration. Based in UK.

Consulting coastal and marine science and engineering firm. Assessment of environmental impacts associated with coastal resource development projects. USA, Japan, Thailand.

Macroinvertebrate identification services for freshwater environments in the United States.

Consulting in marine and freshwater aquatic ecosystems. Located Quebec, Canada.