10.18710/RVJQI4 Sengupta, Sagnik Sagnik Sengupta https://orcid.org/0000-0001-5747-3536 University of Oslo Leinaas, Hans Petter Hans Petter Leinaas https://orcid.org/0000-0001-6628-6767 University of Oslo DataverseNO 2024 Agricultural Sciences Medicine, Health and Life Sciences Other Ecology Thermal adaptation Phenotypic plasticity Reaction norms Thermal performance Life-history traits Life-history strategies Physiological time Degree-days University of Oslo University of Oslo Sagnik Sengupta Nord University Sengupta, Sagnik Sagnik Sengupta 2013-09-01 2024-05-23 2024-07-05 2011-02-01/2012-12-30 Data collected during laboratory experiments 10.1016/J.JTHERBIO.2024.103914 10.18710/RVJQI4/YC2MFU 10.18710/RVJQI4/2XNGJV 10.18710/RVJQI4/DVVF7J 10.18710/RVJQI4/VOOWDY 10.18710/RVJQI4/FYBIFO 66112 63859 2203 1408 10454 text/plain text/plain text/plain text/plain text/plain 1.0 Creative Commons CC0 1.0 Universal Public Domain Dedication. In the present dataset, we focused on a soil microarthropod species abundant across the Northern Hemisphere, Folsomia quadrioculata (Collembola), with previously-known effects of macroclimate. We selected an arctic and a temperate population from areas with contrasting climates (highly stochastic and preictable, respectively) and compared them for thermal plasticity and thermal efficiency in growth, development, fecundity, and survival across four temperatures (10, 15, 20 and 25°C) for a major part of their life cycle. We intended to understand the mechanisms by which temperature drives the evolution of life history strategies. We found that the temperate population maximized performance at 10–15°C, whereas the arctic population maintained its thermal efficiency across a wider temperature range (10–20°C). Thermal plasticity varied in a trait-specific manner, but when considered together with differences in thermal efficiency, indicated that stochasticity in temperature conditions may be important in shaping the life history strategies. Analyses of these data reveal the importance of a "whole-organism approach" and physiological time considerations in clarifying thermal adaptation and understanding plausible climate-trait links underlying organismal responses to global climate change. Norway, Svalbard, Norway, Oslo, Department of Biosciences, University of Oslo 2010/5300