Introduction to special issue: the ecology and evolution of plants in extreme environments

In plant ecology, extreme environments are those that pose physiological or other limitations to plant growth, especially for non-adapted taxa. In these environments, the severity of climate conditions and/or the limitations imposed by particular soil substrates represent major selective pressures for plants, leading to the evolution of a wide array of functional traits, specific strategies and adapted taxa. In this special issue, we present a collection of papers that focuses on plants in various extreme environments, including the Arctic and Antarctic, regions with serpentine and gypsum soils, high mountain areas and deserts. The papers include a broad array of methods to study the ecology and evolution of plants in extreme environments, such as field surveys, greenhouse and field experiments, molecular phylogenetic analyses and/or physiological measurements. Overall, this special issue showcases research on how plants thrive in extreme environments which, in turn, may provide pointers to how plant communities might respond to living in increasingly challenging environments resulting from unprecedented land-use changes and climate warming at the present time and in the future.