National Rivers and Streams Assessment

By Jamie Richardson

From the vast blackwaters of the Suwannee River to a braided creek in Pensacola to a pin-straight residential canal in the greater Miami area, our NRSA crew has been everywhere, man (cue Johnny Cash). For three months, personnel of the Freshwater Plants Research Program travelled all over Florida to sample a variety of unique ecosystems using multiple standardized sampling techniques. For shallow systems, like Pole Branch Creek in rural Calhoun County, our team of 5-7 samplers packed in all our gear and our backpack electrofishing unit and waded through the sites to complete our surveys. But for deeper and wider systems like the extensive Kissimmee River, we conducted our surveys via two boats loaded down with sampling equipment – one for our habitat crew, the other for our fish crew. On every system we recorded observations about habitat type and condition of the banks. We used specialized equipment and techniques to evaluate characteristics like slope, discharge and fish community assemblage. We also collected samples of water, algae, benthic macroinvertebrates, and fish tissue. All samples and data were recorded and sent to the U.S. Environmental Protection Agency (EPA) for analysis.

The National Rivers and Streams Assessment (NRSA) is a nationwide survey designed by the EPA that takes place in all lower 48 states. Rivers, streams and canals all over the country have been randomly selected for sampling. The resulting data provide an unbiased representation of our nation’s flowing waterways for comparing these systems with others in their region. This is part of a major ongoing effort by the EPA called the National Aquatic Resource Surveys. The purpose of these surveys is to assess the conditions of our nation’s waterbodies and to track them over time. NRSA is just one aspect of the big picture and takes place over two consecutive summers, occurring every 5 years. This season was the first of their 2018-19 sampling event.

As our season is wrapping up, we proudly look back at all we have learned, experienced, and accomplished this summer. This project has provided us the opportunity to use new tools and techniques, such as densiometers to measure canopy coverage and stadia rods or sonar to document channel depths and substrate type along thalwegs. It has also encouraged us to connect with other FWC offices, Water Management District personnel, and local land owners or managers. With the help of their local knowledge and expertise we have successfully completed half of the selected survey sites during this first year. We look forward to continuing this work next summer as we prepare to tackle the rest of our sites which include larger river ecosystems such as the Escambia and Apalachicola Rivers.

Our NRSA Sampling Crew included: Jamie Richardson, Kyle Miller, Emily McPartlin, Amanda Christensen (volunteer), Greg Knothe, Siobhan Gorham, & Craig Mallison. A special thanks to: Travis Tuten, John Knight, Kate Harriger, Chelsea Myles-McBurney, Kayla Smith, & Jason O’Connor for their assistance.