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 3
Mean annual precipitation, mean atmospheric deposition, and best-fitted , , and values (1) for the 10th and 90th sediment THg percentiles (lakes, streams), by provinces/territories and by Quebec survey zones (Figure 12).
Location
Medium
Precipitation
atm.Hg
Sediment THg, ng g−1
LOI = 0%
LOI = 100%
M a−1
μg m−2 a−1
10th
10th
90th
10th
90th
10th
90th
Quebec (QC)
Abitibi (22)
Lakes
0.95
20.0
1.13
2.25
2.66
13.4
65.1
74.6
163.5
Churchill (30)
0.64
13.0
1.24
1.93
2.42
17.5
85.4
40.6
103.0
Grenville (23)
0.96
20.2
1.09
2.43
2.64
12.3
59.7
104.8
157.4
Grenville (24)
0.98
20.4
1.19
2.23
2.58
15.6
75.9
71.4
139.7
Grenville (25)
0.97
17.9
1.12
1.74
2.52
13.2
64.2
28.4
125.8
Grenville (26)
1.05
19.1
1.08
2.17
2.58
12.0
58.3
64.3
140.8
Ashuanipi (28)
0.76
15.6
1.33
1.93
2.42
21.5
104.7
40.5
103.6
Minto (29)
0.61
14.3
1.22
2.00
2.42
16.7
81.6
46.8
104.1
Opatica (27)
0.82
20.4
1.35
2.12
2.82
22.3
108.7
57.8
223.7
Platform (18)
1.09
15.7
1.14
2.25
2.6
13.7
67
74.6
147.2
Province/territories
QC
Lakes
0.85
17.3
1.27
2.16
2.79
18.4
89.8
62.7
210.3
AB
0.40
12.1
0.82
1.64
1.97
6.6
32.4
23.1
43.4
BC
0.79
11.1
1.42
1.77
2.25
26.3
128.4
30.0
74.2
MB
0.47
15.7
0.95
1.93
2.23
8.9
43.5
40.8
72.7
NB
1.28
21.8
1.22
2.59
2.56
16.6
80.9
143.2
134.7
NL
0.88
16.1
1.17
2.07
2.51
14.9
72.4
53.2
123.9
NS
1.39
24.1
1.46
2.51
3.52
29.0
141.3
124.2
850.3
NU
0.30
9.8
0.86
2.13
2.42
7.2
35.0
59.9
103.4
NWT
0.31
9.4
0.84
1.93
2.40
6.9
33.6
40.7
100.5
ON
0.86
20.1
1.30
1.96
2.48
20.0
97.6
42.9
116.7
SK
0.46
14.3
0.97
1.91
2.28
9.4
45.9
39.2
79.9
YT
0.36
9.5
1.13
1.77
2.42
13.4
65.2
29.6
103.5
Quebec (QC)
Abitibi (22)
Streams
0.88
21.1
1.61
2.71
3.44
40.4
196.7
180.2
731.0
Abitibi (21)
0.95
19.5
0.94
2.15
2.71
8.8
42.9
61.3
181.1
Appalachian (19)
1.16
21.6
1.04
2.32
2.67
11.1
53.9
86.4
167.0
Appalachian (20)
0.95
19.8
1.15
2.59
2.88
14.0
68.1
143.7
251.3
Churchill (30)
0.69
11.5
1.18
1.88
2.76
15.2
74.2
36.9
199.5
Grenville (23)
1.00
20.1
1.37
1.93
3.52
23.4
114.1
40.2
848.6
Grenville (24)
1.08
21.2
0.95
2.49
2.73
8.8
43.1
118.7
188.5
Grenville (25)
1.08
18.7
1.04
2.31
2.64
10.9
53.3
84.5
159.7
Grenville (26)
1.05
19.1
0.97
2.50
2.68
9.4
45.6
121.9
171.7
Minto (29)
0.58
12.6
0.83
2.42
2.80
6.8
33.3
103.4
215.9
Opatica (27)
0.75
18.1
0.71
2.41
2.84
5.1
25.0
101.8
232.2
Platform (18)
1.07
25.8
0.94
1.84
2.64
8.6
42.1
33.8
159.1
Provinces/territories
QC
Streams
0.96
20.0
1.29
2.16
3.48
19.6
95.3
62.9
798.3
BC
1.09
14.3
1.04
2.62
3.05
10.9
53.3
152.3
344.6
NB
1.15
22.2
1.09
2.55
2.86
12.3
59.8
132.5
239.7
NL
0.63
11.0
0.82
2.56
2.90
6.6
32.3
135.5
261.4
NU
0.30
7.4
0.82
1.90
1.99
6.6
32.2
38.2
45.6
NWT
0.32
8.0
1.53
1.57
2.46
33.8
164.8
20.4
111.9
YT
0.36
9.49
1.28
2.01
2.58
19.0
92.6
47.1
139.8
(90th) = (10th) + (0.688 ± SE 0.018); and standard error of estimate (Std. Err.: SE) = ±0.15; = 0.0180 ± SE 0.0011; and in (ng g−1). Units for and : [ (ng g−1)]. Excluded: ON stream sediments due to small sample size () and insufficient number of values for the 10th and 90th percentiles.
