2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 9:45 AM - 10:00 AM | RELATING INSTREAM NUTRIENT CONCENTRATIONS TO FILAMENTOUS ALGAE COVERAGE AND DOMINANT ALGAL TAXA DURING SUMMER BASEFLOW IN THE BUFFALO NATIONAL RIVER IN ARKANSAS | 150 DEF
RELATING INSTREAM NUTRIENT CONCENTRATIONS TO FILAMENTOUS ALGAE COVERAGE AND DOMINANT ALGAL TAXA DURING SUMMER BASEFLOW IN THE BUFFALO NATIONAL RIVER IN ARKANSAS
Filamentous algae (FA) blooms in the middle and lower reaches of the Buffalo National River in northern Arkansas are cause for growing concern among resource managers, conservationists, and the public. The karst geology of the watershed and increasing amounts of animal production and human contact result in a challenging monitoring scenario for the nation’s first National River. A study investigating the association of FA in the Buffalo River to water-quality was initiated in 2018. One aspect of this study involved comparison of nutrient concentrations to qualitative FA coverage and dominant algal taxa. Spirogyra and Rhizoclonium, two taxa known to proliferate with nutrient enrichment, particularly under large N:P ratios, were the dominant FA taxa identified across sites. Nitrate concentrations were consistently higher in adjacent springs than in the mainstem Buffalo River, and FA coverage was often greatest (>50%) at or downstream of spring sites. The presence and relative richness of cyanobacteria taxa and observations of nitrogen-fixing heterocyte cells was generally associated with sites with relatively lower total nitrogen concentrations. Ongoing data collection should provide valuable insight into the association of FA with nutrient sources and pathways in the Buffalo National River.
- Nutrients
- Bioassessment
- Nitrogen
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Presenters/Authors
Lucas Driver
(), USGS, Lower Mississippi-Gulf Water Science Center, ldriver@usgs.gov;
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David Burge
(), Science Museum of Minnesota, dburge@smm.org ;
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Billy Justus
(), USGS, Little Rock, AR, bjustus@usgs.gov;
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