Low-cost chamber design for simultaneous CO2 and O2 flux measurements between tree stems and the atmosphere.

For O 2 , differences in temperature were highly significant with mean slopes (±SD) of 0.81 ± 0.06, 0.86 ± 0.03 and 0.97 ± 0.02 at 5, 15 and 25°C, respectively ( Table 2 ).

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