EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/25/2021 | 8:30 AM - 10:30 AM | CAN THE ION TRANSPORT CHARACTERISTICS OF DIFFERENT AQUATIC INSECT SPECIES PROVIDE CLUES ABOUT THEIR SENSITIVITIES TO CHANGING SALINITY REGIMES? | Virtual Platform
CAN THE ION TRANSPORT CHARACTERISTICS OF DIFFERENT AQUATIC INSECT SPECIES PROVIDE CLUES ABOUT THEIR SENSITIVITIES TO CHANGING SALINITY REGIMES?
Salinity plays a fundamental role in determining where aquatic species can thrive, but little is known about how physiological traits determine species-specific salinity niches. Concerns are rising about biodiversity losses associated with both the increasing concentrations of major ions in certain areas and decreasing concentrations elsewhere. We are using the radiotracer 22Na in conjunction with ICP-MS to measure uptake and efflux rates and species-specific osmoregulatory characteristics under more dilute conditions. Though most species maintain relatively similar total sodium tissue concentrations, their uptake and efflux rates vary considerably (38 and 156-fold across 9 taxa, respectively). Similarly, the loss of previously acquired 22Na after 9 hours of deionized water challenge varies considerably among species. For example, N. triangulifer lost 44.7% of its 22Na label while Acroneuria sp. lost only 4.8%, showing that permeability differences among taxa can be large. While these studies are in early stages, clear physiological differences in transport dynamics and permeability are emerging among species. Ultimately, these differences may help us understand what role salinity plays in species distribution and how different species may be impacted by changing salinity regimes.
- Osmoregulation
- Global change
- Stream
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Presenters/Authors
Jamie Cochran
(), NC State University, jkcochra@ncsu.edu;
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David Buchwalter
(), North Carolina State University, dbbuchwa@ncsu.edu;
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