2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/26/2021 | 8:30 AM - 10:30 AM | AQUIFER STONEFLIES MAY BE LESS VULNERABLE TO CLIMATE CHANGE THAN BENTHIC STONEFLIES IN ALLUVIAL RIVER FLOODPLAINS | Virtual Platform
AQUIFER STONEFLIES MAY BE LESS VULNERABLE TO CLIMATE CHANGE THAN BENTHIC STONEFLIES IN ALLUVIAL RIVER FLOODPLAINS
The sensitivity and thermal tolerance of different species to warming temperatures in part determines habitat suitability and responses to climate change. Alluvial river floodplains are home to aquifer and benthic stoneflies that inhabit environments with different temperature regimes. We predicted that aquifer stoneflies would be more sensitive to warming temperatures because they experience constantly cold temperatures, whereas benthic species experience more diurnal and seasonal temperature variability. To test this prediction, we conducted intermittent respirometry experiments on nymphs of three aquifer and five benthic species across three floodplains in western Montana. We measured movement patterns, survival, and mass-specific metabolic rates (MSMRs) on 256 individual nymphs at 3-degree increments from 6-30 ºC. Aquifer and benthic taxa showed no difference in the highest temperature at which movement occurred (28 ºC), and they survived equally well. However, the benthic species C. sabulosa did have lower survival compared to other taxa. Mean MSMRs peaked at slightly higher temperatures for aquifer vs. benthic taxa (22.4 vs 21.2 ºC), but differences were not significant. Aquifer taxa may be less vulnerable to warming temperatures given their tolerance and location within buffered aquifers.
- Stream
- Stressor
- Ecological dynamics
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Presenters/Authors
Rachel Malison
(), Flathead Lake Biological Station, The University of Montana, rachel.malison@umontana.edu;
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H. Arthur Woods
(), University of Montana, art.woods@mso.umt.edu;
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Brian Hand
(), Flathead Lake Biological Station, The University of Montana, brian.hand@umontana.edu;
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Gordon Luikart
(), Flathead Lake Biological Station, The University of Montana, gordon.luikart@umontana.edu;
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Jack Stanford
(), Flathead Lake Biological Station-University of Montana, jack.stanford@umontana.edu;
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