2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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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

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Presenters/Authors

Corrie Nyquist (), University of Minnesota, nyqui095@umn.edu;


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Gisli Gislason (), University of Iceland, gisli@ui.is;


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Bruce Vondracek (), University of Minnesota, bvondrac@umn.edu;


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Leonard C. Ferrington, Jr. (), University of Minnesota, ferri016@umn.edu;


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