The links among the changes in litter chemistry, the activity of extracellular enzymes and the microbial community composition were observed in Quercus petraea litter. Three phases of decomposition could be distinguished. In the early 4-month stage, with high activities of β-glucosidase, β-xylosidase and cellobiohydrolase, 16.4% of litter was decomposed. Hemicelluloses were rapidly removed while cellulose and lignin degradation was slow. In months 4-12, with high endocellulase and endoxylanase activities, decomposition of cellulose prevailed and 31.8% of litter mass was lost. After the third phase of decomposition until month 24 with high activity of ligninolytic enzymes, the litter mass loss reached 67.9%. After 2 years of decay, cellulose decomposition was almost complete and most of the remaining polysaccharides were in the form of hemicelluloses. Fungi largely dominated over bacteria as leaf endophytes and also in the litter immediately before contact with soil, and this fungal dominance lasted until month 4. Bacterial biomass (measured as phospholipid fatty acid content) in litter increased with time but also changed qualitatively, showing an increasing number of Actinobacteria. This paper shows that the dynamics of decomposition of individual litter components changes with time in accordance with the changes in the microbial community composition and its production of extracellular enzymes.

Laboratory of Environmental Microbiology Institute of Microbiology of the ASCR v v i Prague Czech Republic

Citace poskytuje Crossref.org

Constraining activity and growth substrate of fungal decomposers via assimilation patterns of inorganic carbon and water into lipid biomarkers

Forest Microhabitat Affects Succession of Fungal Communities on Decomposing Fine Tree Roots

Succession of Microbial Decomposers Is Determined by Litter Type, but Site Conditions Drive Decomposition Rates

Clearcutting alters decomposition processes and initiates complex restructuring of fungal communities in soil and tree roots

Forest Soil Bacteria: Diversity, Involvement in Ecosystem Processes, and Response to Global Change

Decoding the complete arsenal for cellulose and hemicellulose deconstruction in the highly efficient cellulose decomposer Paenibacillus O199

Cellulose and hemicellulose decomposition by forest soil bacteria proceeds by the action of structurally variable enzymatic systems

Tree diversity and species identity effects on soil fungi, protists and animals are context dependent

When the forest dies: the response of forest soil fungi to a bark beetle-induced tree dieback

Potential of cometabolic transformation of polysaccharides and lignin in lignocellulose by soil Actinobacteria

Fungal community on decomposing leaf litter undergoes rapid successional changes