TY - JOUR A1 - Moenickes, Sylvia A1 - Schneider, Anne-Kathrin A1 - Muehle, Lesley A1 - Rohe, Lena A1 - Richter, Otto A1 - Suhling, Frank T1 - From population-level effects to individual response: modelling temperature dependence in Gammarus pulex JF - The journal of experimental biology N2 - Population-level effects of global warming result from concurrent direct and indirect processes. They are typically described by physiologically structured population models (PSPMs). Therefore, inverse modelling offers a tool to identify parameters of individual physiological processes through population-level data analysis, e. g. the temperature dependence of growth from size-frequency data of a field population. Here, we make use of experiments under laboratory conditions, in mesocosms and field monitoring to determine the temperature dependence of growth and mortality of Gammarus pulex. We found an optimum temperature for growth of approximately 17 degrees C and a related temperature coefficient, Q(10), of 1.5 degrees C(-1), irrespective of whether we classically fitted individual growth curves or applied inverse modelling based on PSPMs to laboratory data. From a comparison of underlying data sets we conclude that applying inverse modelling techniques to population-level data results in meaningful response parameters for physiological processes if additional temperature-driven effects, including within-population interaction, can be excluded or determined independently. If this is not the case, parameter estimates describe a cumulative response, e. g. comprising temperature-dependent resource dynamics. Finally, fluctuating temperatures in natural habitats increased the uncertainty in parameter values. Here, PSPM should be applied for virtual monitoring in order to determine a sampling scheme that comprises important dates to reduce parameter uncertainty. KW - temperature response KW - temperature coefficient KW - Q(10) KW - optimum temperature KW - parameter estimation KW - inverse modelling Y1 - 2011 U6 - https://doi.org/10.1242/jeb.061945 SN - 0022-0949 VL - 214 IS - 21 SP - 3678 EP - 3687 PB - Company of Biologists Limited CY - Cambridge ER -