Temperatures recorded over winter 2015-2016 on a 40m deep spawning ground of Lake Geneva from Higher temperature exacerbates the impact of sediments on embryo performances in a salmonid

• Main Authors: Lisandrina Mari, Laura Garaud, Guillaume Evanno, Emilien Lasne
• Format: Still Image
• Language: unknown
• Published: 2016
• Subjects: Ecology; global change; thermal stress; hypoxia; multistress; fish; Arctic; Arctic charr; Climate change; Salvelinus alpinus
• Online Access: https://doi.org/10.6084/m9.figshare.4308101.v1; https://figshare.com/articles/figure/Temperatures_recorded_over_winter_2015-2016_on_a_40m_deep_spawning_ground_of_Lake_Geneva_from_Higher_temperature_exacerbates_the_impact_of_sediments_on_embryo_performances_in_a_salmonid/4308101

In a warming climate, higher temperatures are likely to modulate positively or negatively the effect of other environmental factors on biota, although such interactions are poorly documented. Here, we explore under controlled conditions the combined effects of two common stressors in freshwater ecosystems, higher temperature and sediment load, on the embryonic development of arctic charr ( Salvelinus alpinus L.). In the warm treatment, embryos had a lower survival, a longer incubation period and a smaller body size with a bigger yolk sac volume (YSV). Our data show a significant interaction between temperature and sediment load with temperature increasing dramatically the negative effects of sediment load on fitness-related traits. In the climate change context, these findings highlight the importance of taking into account different thermal scenarios when examining the effect of environmental or anthropogenic stressors.