Distribution, natural history, and conservation of Cambarus dubius in Pennsylvania Author Allison, Patrick F. Author Lieb, David A. Author Loughman, Zachary J. text Journal of Natural History 2022 2022-08-18 56 13 - 16 829 848 http://dx.doi.org/10.1080/00222933.2022.2069056 journal article 127382 10.1080/00222933.2022.2069056 d3937bd3-e349-449d-b6a6-eb3955bda55b 1464-5262 7012082

Table 2. Comparisons of mean habitat variables between sites with Cambarus dubius or burrowing crayfishes present vs absent. Four sites were not included for water table and substrate analyses due to missing or incomplete data. P values <0.0024 were significant (shown in bold).

	Cambarus dubius		All burrowers
Variable	P value	t statistic	P value	t statistic
Elevation (m)	0.0122	−2.5845	<0.0001	−6.5161
Canopy cover (%)	<0.0001	6.8481	<0.0001	5.6506
Depth to water table (cm)	0.0180	−2.4398	<0.0001	−4.6286
Clay substrate (%)	0.5853	0.5587	0.0028	3.0993
Sand substrate (%)	0.3564	−0.9787	0.0016	−3.2633
Silt substrate (%)	0.5269	0.6571	0.0744	1.8464