Higher temperature exacerbates the impact of sediments on embryo performances in a salmonid

• Published in: Biology Letters
• Main Authors: Mari, Lisandrina, Garaud, Laura, Evanno, Guillaume, Lasne, Emilien
• Other Authors: Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ), Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, French Ministry for Research;ONEMA
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2016
• Subjects: global change; thermal stress; hypoxia; multistress; fish; réchauffement climatique; stress environnemental; température; poisson; changement climatique; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; Arctic; Arctic charr; Climate change; Salvelinus alpinus
• Online Access: https://hal.science/hal-01602496; https://doi.org/10.1098/rsbl.2016.0745

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. 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.