Specific Niche Characteristics Facilitate the Invasion of an Alien Fish Invader in Boreal Streams

Table 1

Habitat characteristics of the sampling sites (𝑛=78).

Variable	Mean	Min	Max
Width (m)	13	2	60
Depth (cm)	35	11	66
Velocity (cm/s)	41	13	68
Substratum particle size*	4.5	0	7.4
Canopy shading (%)	11	0	56
Aquatic vegetation cover (%)	53	6	100
Conductivity (μS/cm)	51	18	290
pH	6.7	4.9	7.2

*Wenthworth scale: (0) <0.07 mm; (1) 0.07–2 mm; (2) 2.1–8 mm; (3) 8.1–16 mm; (4) 16.1–32 mm; (5) 32.1–64 mm; (6) 64.1–128 mm; (7) 128.1–256 mm; (8) >256.1 mm.