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Soil organic matter decomposition and carbon sequestration in temperate coniferous forest soils affected by soluble and insoluble spruce needle fractions
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SYSNO ASEP 0505568 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Soil organic matter decomposition and carbon sequestration in temperate coniferous forest soils affected by soluble and insoluble spruce needle fractions Author(s) Jílková, Veronika (BC-A) RID, ORCID
Jandová, K. (CZ)
Sim, A. (GB)
Thornton, B. (GB)
Paterson, E. (GB)Article number 107595 Source Title Soil Biology and Biochemistry. - : Elsevier - ISSN 0038-0717
Roč. 138, November (2019)Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords 13C-depleted CO2 labelling ; fractionation ; microcosms ; phospholipid fatty acids ; Picea abies ; priming effect Subject RIV DO - Wilderness Conservation OECD category Environmental sciences (social aspects to be 5.7) R&D Projects GA17-08717S GA ČR - Czech Science Foundation (CSF) LM2015075 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001782 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support BC-A - RVO:60077344 UT WOS 000495519900014 EID SCOPUS 85071980791 DOI 10.1016/j.soilbio.2019.107595 Annotation Temperate forest soils are important carbon (C) sinks, where the C-stock is largely determined by the balance of leaf inputs and losses through respiration. However, studies dealing with leaf inputs to coniferous forest soils are limited although coniferous forests are widespread through the Northern temperate zone. In this study, we focused on the effects of soluble, insoluble and whole-tissue coniferous needle fractions on soil organic matter (SOM) decomposition and C storage in soil fractions. In addition, the effect of future increased C input was tested by applying a doubled amount of the soluble fraction (whole-tissue + soluble fraction). 13C-labelled needles were produced from spruce seedlings in growth chambers and needle fractions were added to the coniferous forest soil in laboratory microcosms. CO2 respired during incubation from the microcosms was partitioned into needle- and SOM-derived components. After seven months, soils were destructively harvested and analysed for C content in soil fractions and microbial community composition. The soluble, insoluble and whole-tissue fractions resulted in cumulative priming (increased SOM-derived CO2 relative to unamended controls) of 25 ± 8%, 40 ± 1%, and 39 ± 7%, respectively. The doubled soluble-C addition caused a slightly lower priming (38 ± 2%) than the whole-tissue fraction alone. The addition of needle fractions did not significantly affect the C content of soil fractions. However, the soluble fraction retained in soil was mainly found adsorbed onto mineral particles, whereas the insoluble and whole-tissue fractions occurred mainly as free particulate organic matter or adsorbed onto mineral particles. The insoluble and whole-tissue fraction led to increased fungal abundance and decreased abundance of G+ bacteria and actinobacteria. All the fractions were primarily incorporated into fungal biomass after seven months suggesting that fungi were the main consumers of all needle fractions after the labile C had been depleted. When considering all the C gains and losses, the addition of all needle fractions resulted in net soil C increase. This suggests that, although the input of the coniferous needles leads to some C losses through the priming of SOM decomposition, these C losses are compensated by new C storage either in SOM fractions or microbial biomass. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2020 Electronic address https://www.sciencedirect.com/science/article/pii/S0038071719302597?via%3Dihub
Number of the records: 1