Division of Forest and Forest Resources
Carbon sequestration in Norwegian spruce forest soils (CONSEQUENCE)
Norway has pledged to reduce its greenhouse gas emissions, and one of the strategies and ultimate goal is to increase the short and long-term sequestration of organic carbon in forest soil to enhance the carbon stock of soil organic carbon in forests. Generally, soil carbon makes up a large part of the carbon pool in boreal forests, and any disturbance-induced losses could be directly linked to the size of this pool. The decomposition of soil carbon is strongly influenced by temperature and moisture, both of which are impacted by climate change. Altering forest management strategies, such as extending rotation periods and clear-cutting methods, may either increase soil carbon storage or limit its loss. In this new project we will examine soil carbon stock changes over an approximately twelve-year period in nine stands that represent three typical stages of Norwegian spruce forests: recently clear-cut stands, mature planted production forests, and older, naturally-established stands with no active management. We aim to identify the key drivers for soil carbon storage and stability, such as biological stability and temperature sensitivity, and factors affecting chemical and physical stability. We will quantify the standing tree biomass, the source of soil carbon from above and below ground tree litter and dead wood, the age of the soil carbon as well as the microbial diversity and abundance in these forest systems. The project aims to identify links between sol carbon changes, ecosystem carbon stocks, processes, microbial community structure, and diversity. Findings will be integrated with data from previous research projects to evaluate larger scale patterns in carbon stocks and dynamics. Furthermore, the project seeks to facilitate knowledge transfers between researchers, the forest industry, and stakeholders, and support the development of strategies for increased soil carbon sequestration in relation to management and climate change.
