Abstract
Introduction
Increasing forest cover and productivity, along with the implementation of sustainable forest management practices, plays a crucial role in reducing greenhouse gas emissions and enhancing carbon dioxide sequestration. International carbon markets, operating through the carbon credit mechanism, offer substantial opportunities for financing climate-positive initiatives. For Ukraine, this creates the potential to support projects aimed at expanding forest areas, improving forest management, and establishing new protected territories. These actions also contribute to the environmental and socio-economic resilience of the forest sector, support biodiversity conservation, and foster the development of local communities. However, the successful justification and implementation of these climate-positive projects require robust scientific support and a systematic monitoring and verification of the volumes of carbon accumulated as a result of these projects.
The aim of the present research was to estimate the volume of carbon sequestration in woody phytomass and to conduct baseline calculations necessary for monitoring carbon stocks in the forest stands of the Kremenetski Hory National Nature Park.
Materials and Methods
The study was conducted in 2024 within the Kremenetski Hory National Nature Park, located in the European Broad-Leaved Forest Province of the Opil-Kremenetsk District of beech, hornbeam-oak forests, real and steppe meadows and meadow steppes. Much of the native forest has been replaced by secondary hornbeam stands, many of which have reached maturity and now require restoration.
To assess carbon stocks, circular monitoring plots with a radius of 17.84 meters were established. Within these plots, all living and dead trees were inventoried, recording species identification, diameter at breast height, tree status, and visible damage. Tree biomass was calculated using established conversion factors, while deadwood was classified according to density and assessed for volume and mass. This allowed for the calculation of carbon stocks in both living and dead organic matter. Additionally, the status of the European beech understory, established for native stand restoration, was evaluated.
Results
The growing stock of forest stands ranged from 234 to 379 cubic meters per hectare, while deadwood volume ranged from 6.7 to 37.8 cubic meters per hectare. Based on the calculations, carbon stocks were estimated for the primary forest stand components. The average carbon stock in the living stands was 98.3 tons per hectare, with deadwood containing 5.8 tons per hectare. Although natural regeneration and beech forest crops were present, beech density was low and insufficient for successful future stand replacement. Regeneration was dominated by maple and hornbeam, with oak and other species occurring only sporadically. The weakest regeneration was observed in oak-dominated stands.
Conclusion
Establishing baseline carbon stock values is essential for long-term monitoring and for evaluating the effects of restoration activities on the carbon sequestration capacity of forest ecosystems. The total estimated carbon stock across the surveyed plots was 2,200 tons, with approximately 83% stored in aboveground phytomass, 12% in belowground phytomass, and 5% in deadwood. The methodology and dataset developed in this study provide a solid foundation for future carbon monitoring and are suitable for use in climate-related projects, including carbon credit modelling strategies.
4 Tables, 23 Refs.
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