Table II. Oxygen and carbon stable isotope composition of branch sections covered with aluminum foil compared with adjacent sections on the same branch not covered with foil.
Values are given for wood and bark separately. Concentrations of nitrogen and carbon for the same samples are also shown. Values are means of six branches, with se given in parentheses.
| Tissue | δ18O | δ13C | [Nitrogen] | [Carbon] |
| ‰ | mg g−1 | |||
| Wood: foil covered | 21.8 (0.1) | −27.4 (0.2) | 1.7 (0.2) | 465 (4) |
| Wood: no foil | 21.3 (0.2) | −27.9 (0.2) | 1.9 (0.2) | 463 (4) |
| Bark: foil covered | 21.1 (0.3) | −28.0 (0.2) | 1.8 (0.1) | 449 (6) |
| Bark: no foil | 20.7 (0.2) | −28.5 (0.2) | 2.1 (0.2) | 442 (6) |