Table 2.

Summary of crosstab test results for broad habitat distributions (open vs. forested, hygrophilous/aquatic vs. dry) of carabid and dytiscid beetle species in the Churchill region

Species	Distribution*	Habitat preference**	n	p-value	Distributional references
Carabidae
Amara alpina	A	Open, dry	19	0.024	[7,12,48,53]
Amara quenseli	SA	Open, dry	29	0.021	[48,53]
Amara sinuosa	S	-	8
Bembidion hastii	SA	-	5		[7,47,48,53]
Bembidion sordidum	WC	-	5		[7,48,53]
Calathus ingratus	SLA	-	11		[53]
Carabus chamissonis	SHA	Open, dry	14	0.046	[7,47,48,53]
Carabus maender	SLA	-	11		[7,47,48,53]
Carabus taedatus agassii	SAxB	Open, dry	450	<0.01	[47,48,53]
Cymindis unicolor	WC	-	15		[7,12,53]
Dyschirius hiemalis	SA	-	5		[54]
Elaphrus americanus americanus	SA	Open, wet	23	<0.01	[6,53]
Elaphrus lapponicus	SLA	-	7		[7,48,53]
Notiophilus aquaticus	SHA	Forested, wet	9	0.02	[7,53]
Notiophilus borealis	WC	Open, dry	6	0.05	[7,53]
Pterostichus brevicornis brevicornis	SHA	Open, dry	16	0.01	[7,53]
Pterostichus caribou	A	Open	10	0.05	[7,8,12,53]
Pterostichus pinguedineus	SHA	-	5		[7,12,48,53]
Pterostichus punctatissimus	SLA	Open, dry	28	0.012	[7,12,53]
Stereocerus haematopus	WC	Open, dry	31	<0.01	[7,48]
Dytiscidae
Agabus ajax	WC	Open	51	<0.01	[52]
Agabus antennatus	WC	Open	35	<0.01	[52]
Agabus arcticus	SLA	-	52		[49,52]
Agabus audeni	WC	-	9		[52]
Agabus bicolor	WC	Open	10	<0.01	[52]
Agabus clavicornis	SHA	-	9		[52]
Agabus colymbus	SHA	Open	32	<0.01	[52]
Agabus infuscatus	S	Open	93	<0.01	[7,52]
Agabus phaeopterus	S	-	22		[52]
Agabus thomsoni	S	-	8		[52]
Carrhydrus crassipes	WC	-	7		[52]
Colymbetes dolabratus	SA	-	180		[7,52]
Dytiscus alaskanus	WC	Open	9	<0.01	[52]
Dytiscus dauricus	SA	-	36		[52]
Graphoderus perplexus	SA	-	16		[52]
Hydroporus dentellus	SA	-	9		[52]
Hydroporus erythrocephalus	?	Open	11	<0.01
Hydroporus fuscipennis	SA	Open	5	<0.01	[52]
Hydroporus morio	SHA	Open	101	<0.01	[52]
Hydroporus sinuatipes	SLA	Open	24	0.03	[52]
Hydroporus striola	SLA	-	6		[52]
Hydroporus tenebrosus	SA	-	12		[52]
Hygrotus marklini	SA	-	16		[52]
Hygrotus novemlineatus	A	Open	39	<0.01	[52]
Hygrotus picatus	SA	-	5		[52]
Hygrotus sayi	S	-	6		[52]
Hygrotus unguicularis	WC	Open	57	<0.01	[52]
Ilybius discedens	SA	-	6		[52]
Ilybius erichsoni	S	Forested	14	0.05	[52]
Ilybius subaeneus	S	-	44		[52]
Laccophilus biguttatus	SA	-	25		[52]
Nebrioporus macronychus	?	Open	24	<0.01
Neoscutoperus hornii	SLA	Forested	5	0.05	[52]
Oreodytes davisii	?	-	20
Rhantus gutticollis	S	-	5
Rhantus wallisi	SA	-	39		[52]
Stictotarsus griseostriatus	SA	-	96		[52]

Only those species with at least five specimens collected are considered. Canadian provincial records summarized in Bousquet et al. [2]; other available distributional references are supplied below.

*distributional classes from Danks [7] A = Arctic, southern boundary north of the tree line; SA = southern Arctic, transcontinental north of the tree line; SAxB = southern Arctic excluding Beringia, transcontinental north of the tree line; WC = western and central, range from western North America east to Hudson Bay; S = southern, northern boundary at the tree line; SHA = southern high arctic, arctic species extending south of the tree line; SLA = southern low arctic, southern species extending north of the tree line.

** all Dytiscidae were collected in aquatic habitats.