1. School of Biological Sciences, University of Portsmouth, Portsmouth PO1 2DY, UK;
2. Institute of Arctic Biology, University of Alaska, Fairbanks, AK 99775, USA;
3. Department of Biology, NTNU N‐7491, Trondheim, Norway;
4. Departamento de Biología Vegetal y Ecología, Universidad de Sevilla, Apartado 1095, E‐41080 Sevilla, Spain;
5. Department of Geography, University of Southampton, Southampton SO17 1BJ, UK;
6. Real Jardín Botánico de Madrid (CSIC), Plaza de Murillo 2, 28014 Madrid, Spain