2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2021 | 2:00 PM - 3:30 PM | WARM AIR TEMPERATURES ALTER LONGEVITY AND OVIPOSITION OF SUBARCTIC SUMMER-EMERGING CHIRONOMIDS | Virtual Platform
WARM AIR TEMPERATURES ALTER LONGEVITY AND OVIPOSITION OF SUBARCTIC SUMMER-EMERGING CHIRONOMIDS
Climate change is predicted to warm Arctic and Subarctic temperatures at twice the rate of lower latitudes. In Iceland, chironomids emerge from streams throughout the summer and winter months. Warm air temperatures have been demonstrated to decrease longevities of adult cold-adapted chironomids collected in lower latitudes. Thus, warm air temperatures may alter similar aspects of life history for Icelandic chironomids emerging in summer. The goal of this project was to quantify the impact of warm air temperatures on longevity and timing of oviposition of adult summer-emerging chironomids in Iceland. Imagines were collected daily from 4 streams possessing a range of water temperatures (6-20°C) within the Hengill alpine geothermal valleys in 2019. Specimens were incubated at 6°C and 20°C in the laboratory post-collection and observed daily until dead. Longevity was significantly reduced in the warm treatment irrespective of stream site and adults oviposited significantly earlier at 20°C compared to adults held at 6°C. We found that chironomids emerging from both cold and warm streams in Iceland are equally susceptible to warming air temperature and may progress more rapidly through the adult phase of their life cycles.
- Aquatic–terrestrial biodiversity
- Climate change
- Biological effects
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
Corrie Nyquist
(), University of Minnesota, nyqui095@umn.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Gisli Gislason
(), University of Iceland, gisli@ui.is;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Bruce Vondracek
(), University of Minnesota, bvondrac@umn.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Leonard C. Ferrington, Jr.
(), University of Minnesota, ferri016@umn.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -