FIGURE 3 : Examples of expanding (a: Thick-Shelled River MusselU. crassus , b: Quagga Mussel D. r. bugensis ) and
contracting (c: Depressed River Mussel P. complanata, d: Witham
Orb Mussel S. solidum ) distributions inferred from our eDNA
samples. Black dots: available data; red stars: eDNA data; hatched area:
supposed distribution before eDNA sampling; shaded area: actual
distribution range inferred from eDNA samples. eDNA absence data not
shown here, for more precise maps see Supplemental Information.