Biogeochemical Cycling of Elements in Forest Ecosystems

Biogeochemical cycling of elements in Forest ecosystems The plant species biomass of Boreal and Sub-Boreal Forest ecosystems accumulates a significant part of living matter of the whole planet. This value is about 700 x 10 tons of dry weight. The biomass per unit area of different Forest ecosystems varies from 100 to 300 ton/ha and even 400 ton/ha in the Eastern European Oak Forest ecosystems. The annual net primary productivity, NPP, varies from 4.5 to 9.0 ton/ha (Table 9). 

The overall biomass accumulated in Forest ecosystems per unit area is 20 to 50 times higher than the annual productivity. This means that various chemical species 

Cheinical species Chemical species symbol Plant uptake fluxes, kg/ha/yr. 

Total uptake of ash elements by vegetation, kgrtta/year 47 

Ecosystems Coniferous North Coniferous and Mixed Broad-leaved  

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