fig3
![Variation in metal concentration across tree organs and stands: implications for reference specimen development](https://image.oaes.cc/cac624a3-91e9-461e-be6a-0f92ab7912ae/5911.fig.3.jpg)
Figure 3. Principal component analysis using concentrations of Co, Cr, Cu, Ni, and Pb in tree organs – soils ( ,
), bark (
,
), popular leaves (
), and pine needles (
,
).
Figure 3. Principal component analysis using concentrations of Co, Cr, Cu, Ni, and Pb in tree organs – soils ( ,
), bark (
,
), popular leaves (
), and pine needles (
,
).
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