2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/22/2019 | 10:00 AM - 10:15 AM | SUPPLY AND DEMAND: EVALUATING THE EFFECTS OF TEMPERATURE AND FOOD AVAILABILITY ON THE PERFORMANCE OF A MID-LEVEL CONSUMER WITHIN ARCTIC LAKES | 250 CF
SUPPLY AND DEMAND: EVALUATING THE EFFECTS OF TEMPERATURE AND FOOD AVAILABILITY ON THE PERFORMANCE OF A MID-LEVEL CONSUMER WITHIN ARCTIC LAKES
Due to the temperature-dependence of physiological processes, climatic warming may lead to substantial modifications to individual ectotherm performance, with consequences at higher levels of biological organization. Additionally, demand for resources will increase with warming; thus, the effects of warming may be modulated by resource availability. We investigated the independent and interactive effects of warming and food availability on Slimy Sculpin (Cottus cognatus), an abundant mid-level consumer in arctic lakes. We used both a factorial experiment manipulating temperature and food availability as well as bioenergetic simulations. Experimental results indicated significant increases in consumption, excretion, and respiration with warming, while growth decreased with warming, but only when food levels were low. Our bioenergetic simulations agreed with our experimental results and demonstrated that if sculpin behaviorally thermoregulate (select optimal temperatures), growth increases relative to ambient and warmed conditions. With changes in slimy sculpin growth and performance, there will likely be consequences for top predators which rely on sculpin as a prey source. Our results indicate the importance of considering the interaction between temperature and resource availability as well as individual behavior when evaluating the effects of climatic warming on individuals and food webs.
- ClimateChange
- Food Webs
- Predator-prey
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Presenters/Authors
Nicholas Barrett
(), Utah State University, nbarrett1992@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Phaedra Budy
(), U.S. Geological Survey, Utah Cooperative Fish and Wildlife Research Unit, Utah State University, phaedra.budy@usu.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -