Greening of a boreal rich fen driven by CO₂ fertilisation.

The inter-annual variability of CO 2 fluxes We found the increasing net carbon uptake was most likely driven primarily by a positive trend seen in the photosynthesis ( Fig. 3 a; and 6 a (R 2 adj = 0.97, p value= 2.62e-05)) and a stable R h ( Fig. 3 b).

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