Mercury and Organic Matter Concentrations in Lake and Stream Sediments in relation to One Another and to Atmospheric Mercury Deposition and Climate Variations across Canada
Table 2
Mean sediment THg and LOI for streams and lakes, by Quebec survey zones (Figure 12).
Quebec survey zone
Medium
Sediment THg (ng g−1)
Sediment LOI (%)
Mean
Min.
Max.
Std. Dev.
Mean
Min.
Max.
Std. Dev.
Abitibi (22)
Lakes
299
104.1
5
422
68.7
33.6
2
88
15.9
Churchill (30)
18,496
118.2
5
1,500
93.1
26.9
1
98
19.9
Grenville (23)
764
105.6
5
339
56.1
32.4
2
80
12.2
Grenville (24)
5,768
109.6
5
490
56.3
34.8
2
94
14.6
Grenville (25)
4,831
105.9
5
639
66.9
27.3
2
98
14.1
Grenville (26)
17,104
108.6
5
9,820
137.5
30.2
1
98
19.1
Ashuanipi (28)
7,141
109.8
5
7,180
153.4
23.1
2
98
13.1
Minto (29)
1,325
80.0
6
376
39.4
31.8
2
92
19.1
Opatica (27)
12,389
185.4
10
7,410
243.7
28.1
1
98
21.7
Platform (18)
10
85.8
26
150
45.5
28.2
2
90
28.0
Total
68,127
124.6
5
9,820
131.4
28.4
1
98
18.4
Abitibi (22)
Streams
8,187
78.3
5
7,331
190.6
12.5
1
92
15.03
Abitibi (21)
151
69.6
5
1,400
126.3
18.1
1
91
19.59
Appalachian (19)
2,104
63.3
5
520
52.7
10.5
1
95
14.38
Appalachian (20)
7,956
144.8
5
1,435
114.6
30.5
1
97
20.00
Churchill (30)
1,057
135.7
5
980
124.3
30.1
1
92
18.62
Grenville (23)
8,434
234.5
5
9,392
442.5
13.4
1
94
17.18
Grenville (24)
1,262
56.6
5
933
57.2
10.2
2
96
11.24
Grenville (25)
1,462
62.4
5
354
53.1
17.5
2
100
20.21
Grenville (26)
287
79.9
10
412
55.2
18.6
2
92
15.02
Minto (29)
34
34.9
5
150
35.6
19.7
1
69
19.90
Opatica (27)
969
243.4
5
6,720
470.5
28.3
1
90
23.32
Platform (18)
13
18.2
10
57
13.8
2.1
1
4
0.64
Total
31,916
140.4
5
22,690
222.1
18.4
1
100
17.3
Total
100,043
129.6
5
22,690
160.3
25.2
1
100
18.0
Calculated weighted mean and standard deviation (Std. Dev.) for locations with both THg and LOI values. Opatica (27) represents the survey zone across the Opatica, Opinaca, and La Grande geological subprovinces.
