Table 2. Niche dynamics in Europe.

Variation of niche metrics (Expansion, Maximum Niche Stability and Unfilling) along the years in the two sets of invasive subpopulations (P1—from France and contiguous region of Italy and Spain; and P2—from NW of Iberian Peninsula) and corresponding overlap between native and invaded ranges. The uppercase letters (C), (D) and (E) correspond to the regions presented in Fig. 1.

Population	Year	Expansion (C)	Maximum Niche Stability (D) + (E)	Unfilling (E)	Overlap (Schoener’s D index)
P1	2006	0.63	0.37	0.97	0.18
	2007	0.53	0.47	0.91	0.20
	2008	0.55	0.45	0.89	0.18
	2009	0.51	0.49	0.82	0.19
	2010	0.47	0.53	0.79	0.21
	2011	0.43	0.57	0.72	0.24
	2012	0.41	0.59	0.70	0.25
	2013	0.39	0.61	0.70	0.27
	2014	0.36	0.64	0.67	0.29
	2015	0.34	0.66	0.65	0.30
P2	2014	1.00	0.00	1.00	0.00
	2015	0.98	0.02	0.99	0.01
	2016	0.99	0.01	0.99	0.00
	2017	0.99	0.01	0.99	0.00