Llyn Brianne Level II plot - Uptake of heavy metals

Rate of uptake of macronutrients and heavy metals based on estimated tree growth rates
Element Rate of uptake Sample size
Macronutrients (kg ha-1 yr-1) N 3.3 10
P 0.2 10
K 2.2 10
Ca 3.3 10
Mg 1.0 10
Heavy Metals (g ha-1 yr-1) Cu 8.4 10
Zn 81.3 10
Cd 0.67 10
Pb 12.3 10
Ni 3.3 10
Cr 5.0 10

Levels of various macronutrients (mg/kg) in bark, sapwood and heartwood of a selection of dominant and co-dominant trees
Element Bark Sapwood Heartwood
Average Standard error Sample size Average Standard error Sample size Average Standard error Sample size
N 0.406 0.042 5 0.046 0.005 5 0.026 0.004 5
P 0.025 0.002 5 0.004 0.0009 5 0.0004 0.0002 5
K 0.053 0.005 5 0.054 0.007 5 0.029 0.001 5
Mg 0.094 0.009 5 0.014 0.001 5 0.013 0.001 5
Ca 0.371 0.033 5 0.035 0.001 5 0.043

0.002

5
S 193.3 22.33 5 15.3 1.142 5 12.51 0.812 5

Levels of various heavy metals (mg/kg) in bark, sapwood and heartwood of a selection of dominant and co-dominant trees
Element Bark Sapwood Heartwood
Average Standard error Sample size Average Standard error Sample size Average Standard error Sample size
Cu 5.92 0.323 5 1.54 0.242 5 1 0.281 5
Zn 97.88 17.16 5 8.68 1.106 5 9.16 0.659 5
Cd 0.342 0.073 5 0.127 0.051 5 0.096 0.019 5
Pb 22.50 9.630 5 0.656 0.095 5 0.808 0.101 5
Ni 3.033 0.553 5 0.565 0.078 5 0.308 0.059 5
Cr 2.118 0.323 5 1.329 0.337 5 0.398 0.072 5