EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021

(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)

<< BACK TO AGENDA

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 -