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Anthropogenic activities have the potential to thwart efforts towards enhancing the full carbon (C) sink potential of savannas in the context of mitigating the effects of global warming. The understanding of the induced effects of human pressures on the carbon budget of forest˗savanna ecosystems is therefore a valuable tool to better evaluate and predict the current and future effects of human activities on the potential of these forests to sequester carbon in the context of the fight against the global warming. In line with this, the objective of this study was to compare the soil organic carbon stock changes between three well protected forests and three neighbouring unprotected forests which are prone to human pressures (except farming and settlements) in the natural forest˗savanna of Northern Ghana. Three study zones, namely Wungu, Serigu and Mognori were used for the study. For each forest type 30 m × 30 m random plots and 1 m × 1 m random subplots were used to generate data for the comparative analysis. A total of 160 random soil samples (0 to 50 cm depth), 96 random samples of aboveground live biomass, and the same number of litter and root biomass samples were collected in both forest types of each study zone to make composite samples for the determination of plant and soil organic carbon contents. The results of the study showed that total plant C (C in live biomass + litter + roots) was three times higher in the protected forest sites than the unprotected across the three study zones. Soil organic carbon stores were significantly (P< 0.01 and P< 0.05) higher in the protected forest sites than the unprotected. Across the three study zones, soil C store was in general twice greater in the protected sites than the unprotected. The present study indicates the need for employing ecologically and socio-economically sustainable management plans for savanna woodland resources in the region, in collaboration with local communities, so as to sustain communities ̓ livelihoods, besides preserving the full potential of this forest˗savanna to sequester C in the context of the fight against the global climate change.

Soil carbon store and storage potential as affected by human activities in the natural forest˗savanna zone of Northern Ghana