Cyclical and stochastic thermal variability affects survival and growth in brook trout
Pisano, O. M., Kuparinen, A., & Hutchings, J. A. (2019). Cyclical and stochastic thermal variability affects survival and growth in brook trout. Journal of Thermal Biology, 84, 221-227. https://doi.org/10.1016/j.jtherbio.2019.07.012
Published inJournal of Thermal Biology
© 2019 Elsevier Ltd.
Directional changes in temperature have well-documented effects on ectotherms, yet few studies have explored how increased thermal variability (a concomitant of climate change) might affect individual fitness. Using a common-garden experimental protocol, we investigated how bidirectional temperature change can affect survival and growth of brook trout (Salvelinus fontinalis) and whether the survival and growth responses differ between two populations, using four thermal-variability treatments (mean: 10 °C; range: 7–13 °C): (i) constancy; (ii) cyclical fluctuations every two days; (iii) low stochasticity (random changes every 2 days); (iv) high stochasticity (random changes daily). Recently hatched individuals were monitored under thermal variability (6 weeks) and a subsequent one-month period of thermal constancy. We found that variability can positively influence survival, relative to thermal constancy, but negatively affect growth. The observations reported here can be interpreted within the context of Jensen's Inequality (performance at average conditions is unequal to average performance across a range of conditions). Projections of future population viability in the context of climate change would be strengthened by increased experimental attention to the fitness consequences of stochastic and non-stochastic thermal variability. ...
ISSN Search the Publication Forum0306-4565
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland; European Commission
Funding program(s)Academy Project, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingThis work was supported by the Natural Sciences and Engineering Research Council of Canada (170146-2013); the Academy of Finland; and the European Research Council (COMPLEX-FISH 400820).
Showing items with similar title or keywords.
Responses to Developmental Temperature Fluctuation in Life History Traits of Five Drosophila Species (Diptera: Drosophilidae) from Different Thermal Niches Manenti, Tommaso; Kjærsgaard, Anders; Munk Schou, Toke; Pertoldi, Cino; Moghadam, Neda N.; Loeschcke, Volker (MDPI AG, 2021)Temperature has profound effects on biochemical processes as suggested by the extensive variation in performance of organisms across temperatures. Nonetheless, the use of fluctuating temperature (FT) regimes in laboratory ...
The evolution of temperature tolerance and invasiveness in a fluctuating thermal environment Saarinen, Kati (University of Jyväskylä, 2016)The consequences of the climate change on species are still uncertain, despite of intensive research. Currently, rising temperature is not the only concern, since the climate change scenarios also predict increases in ...
Measuring phenotypes in fluctuating environments Burton, Tim; Lakka, Hanna‐Kaisa; Einum, Sigurd (Wiley-Blackwell, 2020)Despite considerable theoretical interest in how the evolution of phenotypic plasticity should be shaped by environmental variability and stochasticity, how individuals actually respond to these aspects of the environment ...
Survival and gene expression under different temperature and humidity regimes in ants Stucki, Dimitri; Freitak, Dalial; Sundström, Liselotte (Public Library of Science, 2017)Short term variation in environmental conditions requires individuals to adapt via changes in behavior and/or physiology. In particular variation in temperature and humidity are common, and the physiological adaptation to ...
Evolutionary rescue at different rates of environmental change is affected by trade‐offs between short‐term performance and long‐term survival Liukkonen, Martta; Kronholm, Ilkka; Ketola, Tarmo (Wiley-Blackwell, 2021)As climate change accelerates and habitats free from anthropogenic impacts diminish, populations are forced to migrate or to adapt quickly. Evolutionary rescue (ER) is a phenomenon, in which a population is able to avoid ...