Pore water CH_{4} concentrations (mg l^{−1}) | 10 cm below the soil surface |

11.1 ± 0.20 | *y *=* *0.238*x* − 0.516 (0.39)*** | *y *=* *0.210*x* − 0.608 (0.41)*** | *y *=* *0.015*x* + 0.033 (0.31)** |

20 cm below the soil surface |

12.6 ± 0.26 | *y *=* *0.208*x* − 0.483 (0.52)*** | *y *=* *0.141*x* − 0.0328 (0.32)** | *y *=* *0.014*x* + 0.024 (0.48)*** |

30 cm below the soil surface |

12.5 ± 0.25 | *y *=* *0.229*x* − 0.723 (0.57)*** | *y *=* *0.152*x* − 0.165 (0.34)** | *y *=* *0.015*x* + 0.017 (0.48)*** |

Stem lenticel density (lenticels cm^{−2}) | 1.90 ± 0.12a | | | |

1.45 ± 0.10b | *y *=* *0.563*x*a + 1.0631 (0.77)*** | *y *=* *0.540*x*b + 0.954 (0.71)*** | *y *=* *0.042*x*c + 0.127 (0.69)*** |

1.67 ± 0.10c | | | |

Stem diameter at the base (cm) | 4.17 ± 0.03 | *y *=* *0.996*x* − 2.02 (0.22)* | *y *=* *0.749*x* − 1.39 (0.16)* | *y *=* *0.051*x* − 0.016 (0.11) |

Whole tree assimilation (mmol h^{−1}) | 51.4 ± 2.14 | *y *= −0.0027*x* + 2.27 (0.006) | *y *= −0.0039*x* + 1.93 (0.02) | *y *= −0.0002*x* + 0.205 (0.004) |

Whole tree stomatal conductance (mol h^{−1}) | 510 ± 22 | *y *= −0.0003*x* + 2.27 (0.006) | *y *= −0.0007*x* + 2.09 (0.06) | *y *= −0.00003*x* + 0.210 (0.01) |

Whole tree transpiration (mol h^{−1}) | 4.06 ± 0.26 | *y *=* *0.048*x* + 1.93 (0.02) | *y *=* *0.043*x* + 1.56 (0.03) | *y *=* *0.0027*x* + 0.186 (0.02) |

Leaf surface area (m^{2}) | 1.08 ± 0.04 | *y *= −0.525*x* + 2.69 (0.09) | *y *= −0.464*x* + 2.23 (0.09) | *y *= −0.029*x* + 0.2629 (0.06) |

PAR (mol m^{−2} h^{−1}) | 1.85 ± 0.09 | *y *= −0.210*x* + 2.52 (0.07) | *y *= −0.119*x* + 1.96 (0.03) | *y *= −0.0121*x* + 0.22 (0.05) |

Air temperature (°C) | 26.5 ± 0.56 | *y *= −0.037*x* + 3.11 (0.08) | *y *= −0.017*x* + 2.17 (0.02) | *y *= −0.003*x* + 0.282 (0.11) |

Soil temperature (°C) | 16.7 ± 0.06 | *y *= −0.038*x* + 2.77 (0.0008) | *y *= −0.097*x* + 3.35 (0.007) | *y *=* *0.0131*x* − 0.021 (0.02) |