Table 1. Locations, physical characteristics, pH, conductivity, and β-diversity values from lakes in this study.

			Latitude	Longitude	Altitude	Lake area	Catchment	Zmax	pH	Conductivity		β-diversity (SD units)
Lake no.	Region	Lake name	(°N)	(°W)	(m asl)	(km2)	area (km2)	(m)		(µS cm−1)	20th c.	19th c.	1550–1800	Reference
Arctic
1	Ellesmere Island	Sawtooth	79.33	81.85	275	2.60	50.0	90.0	8.0	119.4	1.34	id	id	[49]
2	Ellef Ringnes Island	Isachsen I-F	78.79	103.42	12	0.001	0.04	0.3	5.9	158.0	0.80	0.62	0.55	[50]
3	Ellesmere Island	Rock Basin	78.50	76.73	295	0.02	0.2	15.0	6.0	12.3	1.04	0.60	0.75	[51]
4	Melville Island	Pond MV-AT	75.32	111.42	120	0.10	0.4	0.4	8.1	39.0	0.88	0.92	0.64	[52]
5	Baffin Island	CF-11	70.47	68.67	96	0.11	0.6	11.0	6.9	42.7	1.23	0.53	0.86	[53]
6	Baffin Island	CF-10	70.43	69.12	435	0.09	2.7	9.6	6.4	23.9	0.77	0.62	id	[53]
7	Baffin Island	CF-3	70.53	68.37	27	0.20	0.6	7.2	5.9	68.9	0.74	0.60	0.69	[54]
8	West Greenland	Lake B	67.27	51.58	671	1.10	4.1	-	-	-	0.76	0.80	0.74	[55]
9	West Greenland	Nunutak	66.97	49.80	470	0.16	2.2	21.0	7.3	-	0.82	0.87	0.45	[55]
10	West Greenland	ss16	66.91	50.46	477	3.30	0.2	12.2	7.2	-	0.94	0.90	0.84	[55]
11	West Greenland	ss53	66.49	53.53	50	7.30	23.1	8.3	6.9	-	0.95	0.72	id	[55]
12	Northwest Territories	Slipper	64.62	110.83	460	1.90	134.0	17.0	6.6	31.2	1.01	0.88	id	[14]
13	Northwest Territories	TK-20	64.15	107.82	390	0.10	-	8.8	7.2	8.7	0.44	0.46	id	[14]
14	Nunavik (N Québec)	Airport	62.18	75.66	225	0.04	0.1	8.6	6.8	72.0	0.65	0.56	0.98	[56]
15	Nunavik (N Québec)	Tasikutaaq	62.16	75.72	50	0.31	8.6	13.6	6.5	23.0	0.64	0.67	0.88	[56]
16	Nunavik (N Québec)	Qaanganiittuq	62.12	75.59	342	0.06	0.4	13.9	-	-	0.67	0.57	0.48	[56]
17	Nunavik (N Québec)	Nipingngajulik	61.57	71.77	84	0.79	14.3	24.5	6.1	230.0	0.73	0.78	0.81	[56]
18	Nunavik (N Québec)	Allagiap Tasinga	61.54	72.01	156	0.21	3.8	9.0	6.0	21.0	0.75	0.82	0.97	[56]
19	Nunavik (N Québec)	Tasing	61.07	69.56	61	0.03	0.5	3.5	6.6	78.0	1.00	0.97	1.16	[56]
20	Nunavik (N Québec)	Lake X	60.86	70.13	128	0.31	20.4	6.5	7.2	80.0	0.59	0.63	0.54	[56]
										means:	0.84	0.71	0.75
Montane-boreal
21	BC Interior	Fraser	54.08	124.75	670	54.60	6707.1	30.5	7.5	-	0.60	0.79	0.59	[57]
22	BC Interior	North Barrière	51.33	119.83	634	4.50	517.7	52.6	6.6	-	0.51	0.42	0.53	[57]
23	BC Interior	Boomerang	53.68	124.58	1140	0.52	3.9	11.0	7.1	50.0	0.55	id	id	[58]
24	BC Interior	Secord	53.63	124.34	1220	0.40	2.2	8.0	7.0	55.0	0.57	id	id	[58]
25	BC Interior	Justine	53.85	125.09	820	2.48	43.7	10.0	7.1	59.0	0.50	id	id	[58]
26	BC Interior	Unnamed	53.85	125.09	1100	0.79	2.1	19.5	7.5	68.0	0.38	id	id	[58]
27	Vancouver Island, BC	Little Toquart	49.06	125.35	75	0.55	9.9	16.0	6.5	22.5	0.77	id	id	[59]
28	Vancouver Island, BC	Toquart	49.08	125.35	75	1.15	66.8	37.5	6.7	28.6	1.17	id	id	[59]
29	Vancouver Island, BC	Blue	48.73	124.90	90	0.47	5.3	11.0	7.0	24.3	0.37	id	id	[59]
30	Vancouver Island, BC	Angora	49.09	125.53	245	0.31	2.1	46.5	7.8	42.8	0.24	id	id	[59]
31	Northern Alberta	A86	55.68	111.83	678	75.00	197.0	2.7	6.6	25.7	0.86	0.64	id	[32]
32	Northern Alberta	L39	57.96	110.38	356	1.12	18.1	1.5	6.8	108.0	0.59	id	id	[32]
33	Northern Alberta	L107	59.72	110.01	366	3.73	12.2	7.8	7.3	59.7	0.63	id	id	[32]
34	Northern Alberta	L109	59.12	110.82	274	1.29	111.7	13.7	7.1	49.9	0.76	0.66	id	[32]
35	Northern Alberta	Legend	57.41	112.93	787	16.80	93.1	10.2	6.9	29.7	0.46	0.45	id	[32]
36	Northern Alberta	Namur	57.44	112.62	731	43.39	224.0	24.0	7.3	63.6	1.16	id	id	[32]
37	Northern Alberta	Otosan	57.71	112.39	750	3.44	23.4	7.6	6.8	24.7	0.55	0.68	id	[32]
										means:	0.63	0.60	0.56
Alpine
38	CDN Rockies (Jasper)	Curator	52.80	117.87	2232	0.05	0.8	25.0	8.4	220.0	1.15	0.72	0.46	this study
39	CDN Rockies (Banff)	McConnell	51.63	115.97	2300	0.08	2.7	31.0	-	-	0.68	0.62	0.39	this study
40	US Rockies (Beartooths)	Beartooth	44.95	109.60	2713	0.45	61.1	26.2	7.6	30.0	0.87	id	id	[60]
41	US Rockies (Beartooths)	Beauty	44.97	109.57	2874	0.36	15.0	35.1	6.9	7.0	0.82	0.33	0.28	[60]
42	US Rockies (Beartooths)	Emerald	45.00	109.53	3292	0.16	1.0	-	6.0	-	2.00	1.04	0.90	[60]
43	US Rockies (Beartooths)	Fossil	45.00	110.00	3018	0.67	4.1	45.7	6.7	6.0	0.52	0.38	0.38	[60]
44	US Rockies (Beartooths)	Heart	44.98	109.54	3162	0.16	0.9	45.7	7.3	6.4	0.56	0.27	0.33	[60]
45	US Rockies (Beartooths)	Island	44.95	109.54	2901	0.59	18.8	30.5	7.1	7.0	0.76	0.27	0.33	[60]
46	US Rockies (RMNP)	Sky Pond	40.28	105.67	3322	0.03	2.0	7.0	6.5	12.5	0.92	0.45	0.54	[4]
47	US Rockies (RMNP)	Snowdrift	40.34	105.73	3389	0.03	0.4	14.0	6.6	14.7	0.67	0.33	id	[4]
48	US Rockies (RMNP)	Husted	40.58	105.68	3350	0.04	1.5	11.0	6.9	13.4	0.88	1.08	id	[4]
49	US Rockies (RMNP)	Louise	40.55	105.62	3360	0.03	0.7	8.0	6.9	19.9	1.47	1.01	0.54	[4]
50	US Rockies (RMNP)	Nokoni	40.25	105.73	3292	0.08	0.8	38.0	6.4	10.4	0.86	0.49	id	[4]
51	US Rockies (Zirkels)	Pristine	40.69	106.68	3366	0.01	0.2	-	7.0	15.9	1.55	0.46	id	[16]
52	US Rockies (San Juans)	Crater	37.67	107.71	3546	0.03	0.4	13.4	7.0	39.0	1.48	1.17	1.00	this study
									means:	1.01	0.61	0.52
									grand mean:	0.82	0.66	0.65

- = not measured.

id = insufficient dating control.

BC: British Columbia.

RMNP: Rocky Mountain National Park, Colorado.