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Biochemistry, Biophysics, and Structural Biology
Great Lakes Institute for Environmental Research Publications
Articles 1 - 2 of 2
Full-Text Articles in Marine Biology
Limited Heat Tolerance In A Cold-Adapted Seabird: Implications Of A Warming Arctic, Emily S. Choy, Ryan S. O'Connor, H. Grant Gilchrist, Anna L. Hargreaves, Oliver P. Love, François Vézina, Kyle H. Elliott
Limited Heat Tolerance In A Cold-Adapted Seabird: Implications Of A Warming Arctic, Emily S. Choy, Ryan S. O'Connor, H. Grant Gilchrist, Anna L. Hargreaves, Oliver P. Love, François Vézina, Kyle H. Elliott
Great Lakes Institute for Environmental Research Publications
The Arctic is warming at approximately twice the global rate, with welldocumented indirect effects on wildlife. However, few studies have examined the direct effects of warming temperatures on Arctic wildlife, leaving the importance of heat stress unclear. Here, we assessed the direct effects of increasing air temperatures on the physiology of thick-billed murres (Uria lomvia), an Arctic seabird with reported mortalities due to heat stress while nesting on sun-exposed cliffs.We used flow-through respirometry to measure the response of body temperature, resting metabolic rate, evaporative water loss and evaporative cooling efficiency (the ratio of evaporative heat loss to metabolic heat production) …
Limited Heat Tolerance In An Arctic Passerine: Thermoregulatory Implications For Cold-Specialized Birds In A Rapidly Warming World, Ryan S. O'Connor, Audrey Le Pogam, Kevin G. Young, Francis Robitaille, Emily S. Choy, Oliver P. Love, Kyle H. Elliott, Anna L. Hargreaves, Dominique Berteaux, Andrew Tam, François Vézina
Limited Heat Tolerance In An Arctic Passerine: Thermoregulatory Implications For Cold-Specialized Birds In A Rapidly Warming World, Ryan S. O'Connor, Audrey Le Pogam, Kevin G. Young, Francis Robitaille, Emily S. Choy, Oliver P. Love, Kyle H. Elliott, Anna L. Hargreaves, Dominique Berteaux, Andrew Tam, François Vézina
Great Lakes Institute for Environmental Research Publications
Arctic animals inhabit some of the coldest environments on the planet and have evolved physiological mechanisms for minimizing heat loss under extreme cold. However, the Arctic is warming faster than the global average and how well Arctic animals tolerate even moderately high air temperatures (Ta) is unknown. Using flow-through respirometry, we investigated the heat tolerance and evaporative cooling capacity of snow buntings (Plectrophenax nivalis; ≈31 g, N = 42), a cold specialist, Arctic songbird. We exposed buntings to increasing Ta and measured body temperature (Tb), resting metabolic rate (RMR), rates of evaporative water loss (EWL), and evaporative cooling efficiency (the …