Microorganisms are key players in biogeochemical cycling of carbon and nutrients.
Processes related to both soil carbon sequestration and release are generally mediated by fungi and bacteria. In the future, microbial communities and activities may change due to an altered environment and shifting vegetation zones. This could result in altered carbon balance and feedback to global climate change.
Landscape from northern Sweden. Photo: Karina Clemmensen.
We are currently focusing on boreal and subarctic forest ecosystems using field-based manipulation experiments and natural gradients complemented by laboratory-based microcosm experiments. In on-going studies of plant-fungal exudation, microbial community composition and carbon and nitrogen cycling we use a combination of stable isotope probing, enzyme assays, 14C modelling, quantitative PCR and high-throughput pyrosequencing.