2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | POPULATION DYNAMICS AND DISTRIBUTION OF THE STONEFLY YORAPERLA BREVIS IN A WILDERNESS STREAM NETWORK | Virtual Platform
POPULATION DYNAMICS AND DISTRIBUTION OF THE STONEFLY YORAPERLA BREVIS IN A WILDERNESS STREAM NETWORK
In a wilderness stream network in central Idaho, USA, changing climate may be directly or indirectly influencing populations of the stonefly Yoraperla brevis (Peltoperlidae). Monitoring of two headwater streams in late-summer for the last 33 years indicates Y.brevis has gone from being scarce or undetectable to peaking in abundance during the mid-2000s, then dropping to nearly undetectable numbers shortly thereafter. Prompted by these observations, in tandem with a macroinvertebrate community study we conducted a synoptic survey of 20 tributaries and 12 mainstem sites to assess the distribution, abundance, and habitat conditions of Y.brevis. Y.brevis were found in only 9 sites; as expected these were 1-3rd-order tributaries. Among small streams, Y.brevis were found in those that were cold, perennial (usually springfed), and had a preponderance of moss-covered substrate. Some streams, though small and cold, did not have a mossy substrate; these lacked Y.brevis populations. We speculate that the changes revealed by long-term monitoring may be caused by climate-driven flow alterations (including drying), bedload movement, and resulting damage to mossy habitat. For some streams, earlier emergence may also be influencing detection of larvae during summer-time surveys.
- Monitoring
- Stream
- Biodiversity
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
Lauren Stidham
(), Idaho State University, stidlaur@isu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Sawyer Finley
(), Idaho State University, sawyerfinley@isu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Colden Baxter
(), Idaho State University, baxtcold@isu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -