The limitation of carbon sink in Western Siberian forest ecosystems

The gross primary production by photosynthesis (GPP) in the boreal forest zone of Northern Eurasia per hectare annually utilizes tens of tons of atmo spheric carbon as 2 (C 2). Note that the plant cover emits a comparable 2 amount via respiration. The organic carbon as a small positive differ ence between the amounts associated with photosyn thesis and respiration of plant cover (~1%) contributes to the wood and soil pools. Oxidative conversion of the organic substrates of these pools is also consider ably smaller than photosynthesis, not exceeding 12 t of emitted C 2 per hectare of the forest covered area.