change Increase in temperature, disappearance of plant and animal species as well as the drying up of rivers are factors that characterize climate change. Nowadays many areas of the earth are impacted by these changes which are largely caused by human activities. Climate change could become one of the main causes of extinction and decline of plant and animal populations in the coming decades. It is now essential to assess the vulnerability of ecosystems to this threat, and in particular in the islands, because they represent both one of the hotspots of biological diversity and are already very weakened by anthropogenic pressures. According to a study conducted by a research team, affiliated with the Ecology, Systematics, Evolution Laboratory (ESE - CNRS / Université Paris-Saclay / AgroParisTech), the ability of species to cope with the impacts of climate change depends on both internal factors and external factors such as their exposure to this threat, the biological and ecological traits that allow them to survive in the face of thermal changes, but also the characteristics of the habitats that can allow species to escape from areas which are not climatically more favorable to them towards areas more favorable to their survival (eg: climatic refuge at altitude). Classically, research carried out on climate change focuses on the relationship between this threat and the distribution of species, without taking into account the capacity of species to cope with this environmental change. The authors of this study therefore suspected that this species capacity is one of the major factors explaining vulnerability to climate change.