Figure 6
From: Natural and anthropogenic factors drive large-scale freshwater fish invasions

Biplot of RDA results, showing the effect of geography, climate, human factors and land use drivers on the distribution of the top 10 invasive freshwater fish species in Italy. Driver names in different colors identify different invasion drivers groups (see legend). The main axis (RDA1, horizontal) explains 9.61% of the variance (F = 432.56; P < 0.01), while the secondary axis (RDA2, vertical) explains 1.84% of the variance (F = 83.06; P < 0.01). Some variables close to origin (i.e. with negligible effects) were removed to improve readability.