The project led by Prof. Michal Horsák’s group at Masaryk University in Brno explores the causes of compositional changes in stream invertebrate communities in response to climate warming, often showing increased diversity at regional and local scales due to the prevalence of ‘winning’ over ‘losing’ species. Our task in this project is to study the metabolic, behavioural, and physiological aspects of the thermal niche in related model species of insect winners and non-winners in laboratory experiments.