610126.fig.001a
(a)
610126.fig.001b
(b)
610126.fig.001c
(c)
610126.fig.001d
(d)
Figure 1: (a) Distribution of the European GBIF records for Ambrosia artemisiifolia ( ). (b) Distribution of Ambrosia artemisiifolia in Europe in 50 km   50 km grid cells-based on the information of more than 40 national distribution maps and international data bases (see Supplementary Appendix 2). (c) Modelled habitat suitability of Ambrosia artemisiifolia in Europe under current climatic conditions based on the European data (adventive range approach). Warmer colours show areas with better predicted conditions. Algorithm: GBM. (d) Modelled habitat suitability of Ambrosia artemisiifolia in Europe under current climatic conditions based on the North American data (native range approach). Warmer colours show areas with better predicted conditions. Algorithm: GBM. Projection: Europe Albers Equal Area Conic.