Biological Assessment

GBMc & Associates provides a broad range of services relative to the assessment of aquatic biological communities in both streams and lakes.  Fish, macroinvertebrate, periphyton, zooplankton, phytoplankton and habitat collection and analysis techniques have been used over a wide range of habitat types and sampling conditions.  GBMc maintains a variety of field equipment to facilitate multiple site surveys in various size waterbodies.  GBMc & Associates have maintained appropriate state collectors permits, allowing sampling and preservation of aquatic macroinvertebrates, and fish since the mid-1980’s and for multiple states including Arkansas, Oklahoma, Missouri, Mississippi, Virginia and Kansas.  Key attributes of our bioassessment program are listed below.

Experience and Capabilities  

  • Conducted hundreds of rapid bioassessments above and below point source (industrial and municipal) and non-point pollution sources to evaluate the development of benthic macroinvertebrate and fish communities, the maintenance of designated uses, and the biological integrity of the receiving stream.
  • Conducted simple qualitative and detailed quantitative habitat assessments (both aquatic and terrestrial) as a prerequisite to maintenance of biological integrity.
  • Performed periphyton community analysis using various techniques including the rapid periphyton survey, quantitative biomass sampling and visual qualitative coverage assessment.
  • Designed and implemented quantitative sampling and assessment programs for benthic and fish communities to measure pre and post project biological integrity on systems ranging from intermittent streams to the Arkansas River.
  • Designed and completed bioassessment and trophic status analysis for lake environments.  Assessments have included surveys of fish, zooplankton, phytoplankton, macrophytes and riparian habitat.  Data was used to assign trophic status to the lake and recommend management options.


GBMc Contact Greg Phillips