Biological Science in Texas

Science Center Objects

The USGS Texas Water Science Center (TXWSC) provides policy makers, public agencies, non-governmental organizations, and stakeholders with baseline data and interpretations on the occurrence and distribution of instream and riparian-zone biological resources; assesses the status and trends of instream and riparian-zone biological resources in relation to differences in channel habitat, instream flow, and water quality; and uses predictive modeling to develop an understanding of the effects of changes to stream ecosystems. Visit the links below for more information on our data and science.


TXWSC has expertise in a wide variety of biological science applications, including, but not limited to: 

  • Fish, benthic Invertebrate, and Algal Community Surveys
  • Mussel Surveys and Fish Host Determinations
  • Contaminant Pathways in Aquatic Biota
  • Microbial Source Tracking
  • Reservoir Plankton Dynamics
  • River Mapping and Stream Habitat Assessment
  • Biotic Response to Nutrients in Streams
  • Environmental Flows Assessment
  • Use Attainability Analysis (UAA)
  • Biological Database Design and Development
  • Invasive Species Monitoring


Find out more about TXWSC biological science expertise in this printable information sheet.



Electrofishing in the Frio River, Texas

Electrofishing in the Frio River, Texas.(Public domain.)


Harmful/Invasive species monitoring

Cyanobacteria Methods

Zebra Mussel Monitoring Program (ZMMP)


Water-Quality Monitoring

National Water-Quality Assessment Project in Texas  - Surface Water Activities

Water-Quality Monitoring at Offshore Artificial Reefs