Plant functional type affects nitrogen use efficiency in high-Arctic tundra
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F16%3A00000123" target="_blank" >RIV/00025798:_____/16:00000123 - isvavai.cz</a>
Alternative codes found
RIV/86652079:_____/16:00465859
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0038071715003910" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0038071715003910</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.soilbio.2015.11.008" target="_blank" >10.1016/j.soilbio.2015.11.008</a>
Alternative languages
Result language
angličtina
Original language name
Plant functional type affects nitrogen use efficiency in high-Arctic tundra
Original language description
To unravel the potential effects of climate warming on soil N availability in a high Arctic tundra ecosystem we studied temperature effects on soil mineralization, and N uptake from different soil depths(3, 10 and 30 cm) by tundra plants. Uptake was assessed using 15N tracer injected directly into mineral soil as 15NH4Cl solution to specifically mimic altered N availability from enhanced mineralization. Net N mineralization rates were very low, suggesting that N is strongly limiting in this system. There was no apparent temperature effect (-2 °C, 5 °C, 10 °C) on mineralization, but net nitrification was strongly limited by temperature e under the -2 °C treatment no nitrification occurred. As a consequence of ongoing mineralization and limited nitrification under freezing conditions, mineral NH4 may accumulate during the winter season and be available for plant uptake without risk of loss via NO3 leaching immediately after snowmelt. Nitrogen uptake niches were clearly stratified by depth. Graminoids (Carex misandra and Luzula arctica) were most effective at taking up N from deep soil horizons, and recovery in graminoid biomass after one year was independent of 15N injection depth. Recovery of N by the dwarf shrub Salix polaris was significantly higher following shallow application (3 cm) compared to deeper treatments (10 and 30 cm). Lichens and mosses also showed a decline in N uptake with application depth, and very little N was recovered by lichens and mosses even from 3 cm, in contrast to the strong uptake that has been observed in mosses when N is applied to the vegetation surface. The ability of graminoids to access nutrients from deeper mineral soil may give them an advantage over mosses and dwarf shrubs in warmer high Arctic tundra in acquiring limited available nutrient resources.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DF - Pedology
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Soil Biology & Biochemistry
ISSN
0038-0717
e-ISSN
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Volume of the periodical
94
Issue of the periodical within the volume
March
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
19-28
UT code for WoS article
000370094100003
EID of the result in the Scopus database
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