2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 11:30 AM - 11:45 AM | GENETIC DIVERSITY OF A VAGILE AQUATIC INSECT VARIES WITH RIVER NETWORK STRUCTURE | 253 AB
GENETIC DIVERSITY OF A VAGILE AQUATIC INSECT VARIES WITH RIVER NETWORK STRUCTURE
Gene flow among populations is constrained by dispersal ability, habitat connectivity, and time. For aquatic organisms that disperse along stream corridors, habitat connectivity of a river network can thus define the boundaries of gene flow. In this study, we investigated the genetic diversity of a strong-dispersing caddisfly, Hydropsyche oslari, using mtDNA (CO1 gene) in the topologically diverse Colorado River Basin. We expected to find less genetic distance among H. oslari within the Upper Basin, which has a dense dendritic network of perennial tributaries, than among populations within the arid and sparse river network of Grand Canyon in the Lower Basin. The two basins are divided by Lake Powell, a >300 km long reservoir on the Arizona-Utah border in the southwestern United States. Consistent with predictions, we found that H. oslari within the Upper Basin shared more genetic similarities than H. oslari within Grand Canyon. Additionally, we found that populations in the Upper Basin and Grand Canyon were entirely genetically differentiated, indicating that these two populations were isolated thousands of years before the 1963 closure of Glen Canyon Dam and subsequent filling of Lake Powell.
- Genetics
- Invertebrate
- Dispersal
Presentation:
This presentation has not yet been uploaded.
Handouts:
Handout is not Available
Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference
Presenters/Authors
Anya Metcalfe
(), USGS, ametcalfe@usgs.gov;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Ted Kennedy
(), USGS Southwest Biological Science Center, Grand Canyon Monitoring and Research Center, tkennedy@usgs.gov;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jane Marks
(), Northern Arizona University, jane.marks@nau.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jeffrey Muehlbauer
(), USGS Grand Canyon Monitoring and Research Center, jmuehlbauer@usgs.gov;
ASHA DISCLOSURE:
Financial -
Nonfinancial -