1. Norwegian Institute of Bioeconomy Research (NIBIO), 1431 Ås, Norway.
2. CEES, Department of Biosciences, University of Oslo, Blindern 0316, Oslo, Norway.
3. School of Geographic and Oceanographic Science, Xianlin Campus, Nanjing University, Nanjing 210023, China.
4. Department of Geography, University College London, London WC1E 6BT, UK.