期刊
FRESHWATER SCIENCE
卷 31, 期 1, 页码 83-92出版社
UNIV CHICAGO PRESS
DOI: 10.1899/11-025.1
关键词
critical thermal maximum; unionid; acclimation; gape behavior; hypoxia; traits; thermal stress
Understanding species' temperature tolerances in the context of concurrent environmental stressors is critical because thermal regimes of freshwater ecosystems are changing. We evaluated the critical thermal maximum (CTM) of 3 freshwater mussel species (Alasmidonta varicosa, Elliptio complanata, and Strophitus undulatus) acclimated to 2 temperatures (15 and 25 degrees C) and exposed to 2 aeration treatments (aerated vs unaerated) during CTM testing. Responses varied by species, but mussels acclimated to 25 degrees C generally had a higher CTM than mussels acclimated to 15 degrees C. For E. complanata, the effects of acclimation temperature and aeration were interactive, such that CTM was highest at 15 degrees C but only under aerated conditions. Our results indicate that recent thermal history affects thermal tolerance, combinations of environmental stressors may influence thermal tolerance, and such responses vary among species.
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