How can herbivore browsing affect above-ground carbon stocks in boreal forests?

I think normally herbivore browsing will normally result reduction in the vegetation above-ground biomass what means the carbon stock but the process will be influenced with the balance between grazing load and normal restoration capacity of the forest if there is excessive grazing losing of above-ground biomass may be greater and subsequent loss of carbon stocks but inversly browsers may selectively selectively choose plant species as a fodder giving more chance to non-fodder plants to develop what results more abundance of better carbon fixers than grazed species, it is higly interacting and requirs study og grazing capacity, grazing selectivity, forest restoration capacity and carbon sequestration potentiality of dominant species WaWOOO it is a big issue.