85 - 90 % of SOM decomposition
||Siles JA et al., Effect of altitude and season on microbial activity, abundance and community structure in Alpine forest soils. FEMS Microbiol Ecol. 2016 Mar92(3). pii: fiw008. doi: 10.1093/femsec/fiw008 p.2 left column 2nd paragraphPubMed ID26787774
||Djukic I et al., In situ carbon turnover dynamics and the role of soil microorganisms therein: a climate warming study in an Alpine ecosystem. FEMS Microbiol Ecol. 2013 Jan83(1):112-24. doi: 10.1111/j.1574-6941.2012.01449.xPubMed ID22809312
||P.2 left column 2nd paragraph: "Litter and soil organic matter (SOM) decomposition depend on three main interacting groups of factors: chemical (chemical composition and quality of litter and SOM), physical (climate, moisture and soil physical properties) and biotic factors (abundance and composition of soil microorganisms and fauna involved in the process) (Polyakova and Billor 2007). The importance of soil microorganisms in this process is clear since they mediate 85–90% of SOM decomposition (primary source). Their activity is dependent on substrate quantity and quality as well as on environmental conditions, such as temperature, moisture, pH, soil type or soil depth (Zhang et al. 2013)."