Table 1.
Sample description including codification, island, type of wine, production method, harvest, grape variety, location, and geological substrate.
Fig 1.
Correlation plot between all pairs of the 47 metal concentration measures obtained.
Color scale according to Spearman correlation coefficient (r) and circle size absolute r values. Significant differences (p < 0.05) are black framed.
Fig 2.
Metal concentrations for wine samples from conventional management (con) and organic management (eco).
See S1 Table for concentration units of each variable.
Fig 3.
A-D. Principal components analyses ordinations of the wine samples according to the variation in metal concentration profiles. A) variable contribution to two main principal components and B, C, D) wine samples ordinations grouped by management type (conventional, con; organic, eco), type of wine (red, R; white, W) and the island of origin (El Hierro, EH; La Palma, LP; La Gomera, LG; Tenerife, TF; Gran Canaria, GC; Fuerteventura, FT; Lanzarote, LZ) respectively.
Table 2.
Concentration of each element in all organic and conventional samples.
Table 3.
Concentration of each element in ng/l, averaging the data for the two samples analysed per island.
Table 4.
Average concentration in ng/ l of each element in the two wine types.