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Trace Elements in Forager Bees and Pollen Collected Along Transects in Urban Areas of Maryland, 1999.
Values are means in ppm by weight ± RSD (%). n = 4
| Element |
Live Bees |
Pollen |
| |
Transect NNE |
Transect NW |
Transect WSW |
Transect NNE |
Transect NW |
Transect WSW |
| As |
0.6 ± 25.7 |
0.4 ± 10.8 |
0.4 ± 10.0 |
0.4 ± 19.3 |
0.3 ± 8.4 |
0.3 ± 5.1 |
| Ba |
3.4 ± 5.1 |
3.1 ± 2.3 |
2.7 ± 2.0 |
3.3 ± 2.8 |
2.5 ± 1.4 |
2.7 ± 2.0 |
| Be |
BDL |
BDL |
BDL |
BDL |
BDL |
BDL |
| Bi |
BDL |
BDL |
BDL |
BDL |
BDL |
BDL |
| Cd |
0.4 ± 24.0 |
0.6 ± 9.3 |
0.7 ± 9.9 |
0.4 ± 13.9 |
0.3 ± 3.2 |
0.3 ± 2.6 |
| Co |
0.6 ± 19.2 |
0.6 ± 7.4 |
0.8 ± 6.6 |
0.2 ± 32.2 |
0.5 ± 1.8 |
0.1 ± 2.7 |
| Cr |
0.4 ± 29.6 |
0.3 ± 12.0 |
0.4 ± 9.5 |
0.4 ± 21.2 |
0.5 ± 3.7 |
0.4 ± 6.0 |
| Cs |
BDL |
BDL |
BDL |
BDL |
BDL |
BDL |
| Cu |
18.5 ± 1.9 |
19.6 ± 1.6 |
20.2 ± 1.8 |
10.0 ± 2.2 |
10.5 ± 2.3 |
10.7 ± 1.6 |
| Ga |
0.2 ± 16.4 |
0.1 ± 5.3 |
0.1 ± 4.1 |
0.2 ± 10.6 |
0.1 ± 2.3 |
0.1 ± 1.9 |
| Mn |
84.1 ± 1.6 |
109.8 ± 2.2 |
119.9 ± 2.1 |
21.1 ± 2.3 |
23.6 ± 2.5 |
24.1 ± 1.7 |
| Ni |
0.9 ± 14.4 |
0.9 ± 5.2 |
1.5 ± 5.3 |
1.6 ± 6.5 |
1.7 ± 2.2 |
1.5 ± 2.1 |
| Pb |
3.1 ± 5.0 |
3.5 ± 2.7 |
4.9 ± 2.7 |
4.5 ± 3.2 |
6.5 ± 2.2 |
5.0 ± 2.1 |
| Rb |
8.8 ± 1.3 |
6.9 ± 1.3 |
7.4 ± 1.6 |
10.1 ± 1.5 |
10.0 ± 1.5 |
8.5 ± 1.5 |
| Se |
0.6 ± 34.8 |
0.5 ± 23.0 |
0.4 ± 16.6 |
0.3 ± 58.6 |
0.2 ± 41.8 |
0.2 ± 24.6 |
| Sr |
2.0 ± 8.3 |
1.9 ± 2.6 |
2.1 ± 2.6 |
1.9 ± 5.2 |
1.9 ± 1.4 |
2.0 ± 1.4 |
| Ti |
0.9 ± 31.3 |
0.03 ± 23.8 |
BDL |
BDL |
BDL |
BDL |
| U |
BDL |
BDL |
BDL |
BDL |
BDL |
BDL |
| V |
0.6 ± 20.4 |
0.6 ± 8.4 |
0.5 ± 5.8 |
0.7 ± 12.8 |
0.6 ± 2.4 |
0.5 ± 2.5 |
| Zn |
103.3 ± 2.2 |
124.9 ± 1.8 |
123.6 ± 1.8 |
97.7 ± 3.7 |
137.7 ± 2.1 |
89.8 ± 1.5 |
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