Figure 6 in Distribution, natural history, and conservation of Cambarus dubius in Pennsylvania

Figure 6. Means (red and blue bars), medians (black lines), and standard errors (±) of habitat variables from geographic information system (GIS) databases between sites with crayfish present vs absent. Permutation-based t-tests displayed significant differences (P <0.0024) in variables between sites with C. dubius present vs absent (A–C) and sites with all burrowing crayfish species/burrows present vs absent (D–I). Habitat variables not pictured were not significant.