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RESEARCH PRODUCT
Priming effect increases with depth in a boreal forest soil
Kristiina KarhuHannu NykänenHannu FritzeEmmi HilasvuoriChristina BiasiJussi HeinonsaloJukka PumpanenPekka VanhalaJari Liskisubject
priming effect010504 meteorology & atmospheric sciencesta1172Soil Sciencechemistry.chemical_elementSoil sciencePhotosynthesiscomplex mixtures01 natural sciencesMicrobiologyboreal forest soilOrganic matterEcosystem0105 earth and related environmental scienceschemistry.chemical_classificationRhizosphereChemistrySoil organic matterTaigata118304 agricultural and veterinary sciences15. Life on landNitrogenC & N interactionsclimate change13. Climate action040103 agronomy & agricultureta11810401 agriculture forestry and fisheriesSoil horizondescription
Abstract Climate warming increases labile carbon (C) inputs to soil through increased photosynthesis and C allocation belowground. This could counterintuitively lead to losses of soil C via priming effects (PE): the stimulation of soil organic matter (SOM) decomposition caused by labile C addition. Systematic quantification of PEs in different ecosystems is needed. We measured PEs of free-living soil microbes in different layers of a boreal forest soil, and found that the relative magnitude of the PE increased with soil depth. The relationship between relative PE and the added glucose amount also depended on the soil layer. Our results indicate that the decomposition of SOM in deeper soil layers could be significantly increased due to PE, if labile C inputs into these layers increase.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-08-01 | Soil biology & biochemistry |