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Statements

Subject Item
n2:RIV%2F60076658%3A12310%2F14%3A43887508%21RIV15-MSM-12310___
rdf:type
n17:Vysledek skos:Concept
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0038071714001345
dcterms:description
Rising temperatures in the Arctic can affect soil organic matter (SOM) decomposition directly and indirectly, by increasing plant primary production and thus the allocation of plant-derived organic compounds into the soil. Such compounds, for example root exudates or decaying fine roots, are easily available for microorganisms, and can alter the decomposition of older SUM (%22priming effect%22). We here report on a SUM priming experiment in the active layer of a permafrost soil from the central Siberian Arctic, comparing responses of organic topsoil, mineral subsoil, and cryoturbated subsoil material (i.e., poorly decomposed topsoil material subducted into the subsoil by freeze-thaw processes) to additions of C-13-labeled glucose, cellulose, a mixture of amino acids, and protein (added at levels corresponding to approximately 1% of soil organic carbon).Our findings provide a first mechanistic understanding of priming in permafrost soils and suggest that an increase in the availability of organic carbon or nitrogen, e.g., by increased plant productivity, can change the decomposition of SUM stored in deeper layers of permafrost soils, with possible repercussions on the global climate. Rising temperatures in the Arctic can affect soil organic matter (SOM) decomposition directly and indirectly, by increasing plant primary production and thus the allocation of plant-derived organic compounds into the soil. Such compounds, for example root exudates or decaying fine roots, are easily available for microorganisms, and can alter the decomposition of older SUM (%22priming effect%22). We here report on a SUM priming experiment in the active layer of a permafrost soil from the central Siberian Arctic, comparing responses of organic topsoil, mineral subsoil, and cryoturbated subsoil material (i.e., poorly decomposed topsoil material subducted into the subsoil by freeze-thaw processes) to additions of C-13-labeled glucose, cellulose, a mixture of amino acids, and protein (added at levels corresponding to approximately 1% of soil organic carbon).Our findings provide a first mechanistic understanding of priming in permafrost soils and suggest that an increase in the availability of organic carbon or nitrogen, e.g., by increased plant productivity, can change the decomposition of SUM stored in deeper layers of permafrost soils, with possible repercussions on the global climate.
dcterms:title
Input of easily available organic C and N stimulates microbial decomposition of soil organic matter in arctic permafrost soil Input of easily available organic C and N stimulates microbial decomposition of soil organic matter in arctic permafrost soil
skos:prefLabel
Input of easily available organic C and N stimulates microbial decomposition of soil organic matter in arctic permafrost soil Input of easily available organic C and N stimulates microbial decomposition of soil organic matter in arctic permafrost soil
skos:notation
RIV/60076658:12310/14:43887508!RIV15-MSM-12310___
n3:aktivita
n14:S
n3:aktivity
S
n3:cisloPeriodika
AUG 2014
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n4:9014632 n4:5851114 n4:8110107
n3:druhVysledku
n11:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n7:predkladatel
n3:idSjednocenehoVysledku
22021
n3:idVysledku
RIV/60076658:12310/14:43887508
n3:jazykVysledku
n16:eng
n3:klicovaSlova
Permafrost; Tundra; Phospholipid fatty acid (PLFA); Organic matter decomposition; Priming
n3:klicoveSlovo
n6:Phospholipid%20fatty%20acid%20%28PLFA%29 n6:Priming n6:Tundra n6:Permafrost n6:Organic%20matter%20decomposition
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[92E1228B4DCD]
n3:nazevZdroje
Soil Biology & Biochemistry
n3:obor
n18:DF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
18
n3:rokUplatneniVysledku
n13:2014
n3:svazekPeriodika
75
n3:tvurceVysledku
Barsukov, Pavel Čapek, Petr Gentsch, Norman Mikutta, Robert Alves, Ricardo J. Eloy Guggenberger, Georg Gittel, Antje Watzka, Margarete Bárta, Jiří Wild, Birgit Richter, Andreas Shibistova, Olga Lashchinskiy, Nikolay Urich, Tim Rusalimova, Olga Šantrůčková, Hana Schnecker, Joerg Zrazhevskaya, Galina
n3:wos
000338619600015
s:issn
0038-0717
s:numberOfPages
9
n9:doi
10.1016/j.soilbio.2014.04.014
n12:organizacniJednotka
12310