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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.14722
|2 doi
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|a pubmed24n0992.xml
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|a (DE-627)NLM297839888
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|a (NLM)31166650
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Maaroufi, Nadia I
|e verfasserin
|4 aut
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| 245 |
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|a Anthropogenic nitrogen enrichment enhances soil carbon accumulation by impacting saprotrophs rather than ectomycorrhizal fungal activity
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 11.10.2019
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|a Date Revised 11.10.2019
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2019 John Wiley & Sons Ltd.
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|a There is evidence that anthropogenic nitrogen (N) deposition enhances carbon (C) sequestration in boreal forest soils. However, it is unclear how free-living saprotrophs (bacteria and fungi, SAP) and ectomycorrhizal (EM) fungi responses to N addition impact soil C dynamics. Our aim was to investigate how SAP and EM communities are impacted by N enrichment and to estimate whether these changes influence decay of litter and humus. We conducted a long-term experiment in northern Sweden, maintained since 2004, consisting of ambient, low N additions (0, 3, 6, and 12 kg N ha-1 year-1 ) simulating current N deposition rates in the boreal region, as well as a high N addition (50 kg N ha-1 year-1 ). Our data showed that long-term N enrichment impeded mass loss of litter, but not of humus, and only in response to the highest N addition treatment. Furthermore, our data showed that EM fungi reduced the mass of N and P in both substrates during the incubation period compared to when only SAP organisms were present. Low N additions had no effect on microbial community structure, while the high N addition decreased fungal and bacterial biomasses and altered EM fungi and SAP community composition. Actinomycetes were the only bacterial SAP to show increased biomass in response to the highest N addition. These results provide a mechanistic understanding of how anthropogenic N enrichment can influence soil C accumulation rates and suggest that current N deposition rates in the boreal region (≤12 kg N ha-1 year-1 ) are likely to have a minor impact on the soil microbial community and the decomposition of humus and litter
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Gadgil effect
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|a ITS amplicons
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|a carbon sequestration
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|a ecological stoichiometry
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|a high-throughput sequencing
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|a ingrowth mesh bags
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|a litter decomposition
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|a root exclosure
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|a soil organic matter
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|a Soil
|2 NLM
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|a Carbon
|2 NLM
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|a 7440-44-0
|2 NLM
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|a Nitrogen
|2 NLM
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| 650 |
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|a N762921K75
|2 NLM
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1 |
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|a Nordin, Annika
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Palmqvist, Kristin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hasselquist, Niles J
|e verfasserin
|4 aut
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| 700 |
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|a Forsmark, Benjamin
|e verfasserin
|4 aut
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| 700 |
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|a Rosenstock, Nicholas P
|e verfasserin
|4 aut
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|a Wallander, Håkan
|e verfasserin
|4 aut
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| 700 |
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|a Gundale, Michael J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Global change biology
|d 1999
|g 25(2019), 9 vom: 29. Sept., Seite 2900-2914
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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| 773 |
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|g volume:25
|g year:2019
|g number:9
|g day:29
|g month:09
|g pages:2900-2914
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|u http://dx.doi.org/10.1111/gcb.14722
|3 Volltext
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|d 25
|j 2019
|e 9
|b 29
|c 09
|h 2900-2914
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