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Microbial carbon and nitrogen processes in high-Arctic riparian soils

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Microbial carbon and nitrogen processes in high-Arctic riparian soils. / Pastor, Ada; Poblador, Sílvia; Skovsholt, Louis J.; Riis, Tenna.

I: Permafrost and Periglacial Processes, Bind 31, Nr. 1, 01.2020, s. 223-236.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Pastor, A, Poblador, S, Skovsholt, LJ & Riis, T 2020, 'Microbial carbon and nitrogen processes in high-Arctic riparian soils', Permafrost and Periglacial Processes, bind 31, nr. 1, s. 223-236. https://doi.org/10.1002/ppp.2039

APA

Pastor, A., Poblador, S., Skovsholt, L. J., & Riis, T. (2020). Microbial carbon and nitrogen processes in high-Arctic riparian soils. Permafrost and Periglacial Processes, 31(1), 223-236. https://doi.org/10.1002/ppp.2039

CBE

Pastor A, Poblador S, Skovsholt LJ, Riis T. 2020. Microbial carbon and nitrogen processes in high-Arctic riparian soils. Permafrost and Periglacial Processes. 31(1):223-236. https://doi.org/10.1002/ppp.2039

MLA

Vancouver

Pastor A, Poblador S, Skovsholt LJ, Riis T. Microbial carbon and nitrogen processes in high-Arctic riparian soils. Permafrost and Periglacial Processes. 2020 jan;31(1):223-236. https://doi.org/10.1002/ppp.2039

Author

Pastor, Ada ; Poblador, Sílvia ; Skovsholt, Louis J. ; Riis, Tenna. / Microbial carbon and nitrogen processes in high-Arctic riparian soils. I: Permafrost and Periglacial Processes. 2020 ; Bind 31, Nr. 1. s. 223-236.

Bibtex

@article{33ce888d54c04eabb68b4462cacd61df,
title = "Microbial carbon and nitrogen processes in high-Arctic riparian soils",
abstract = "The aim of this work was to assess the biogeochemical role of riparian soils in the High Arctic to determine to what extent these soils may act as sources or sinks of carbon (C) and nitrogen (N). To do so, we compared two riparian areas that varied in riparian vegetation coverage and soil physical perturbation (i.e., thermo-erosion gully) in NE Greenland (74°N) during late summer. Microbial soil respiration (0.4–3.2 μmol CO2 m−2 s−1) was similar to values previously found across vegetation types in the same area and increased with higher temperatures, soil column depth and soil organic C degradation. Riparian soils had low nitrate concentrations (0.02–0.64 μg N-NO3 − g−1), negligible net nitrification rates and negative net N mineralization rates (−0.58 to 0.33 μg N g−1 day−1), thus indicating efficient microbial N uptake due to low N availability. We did not find any effects of physical perturbation on soil respiration or on N processing, but the dissolved fraction of organic matter in the soil was one order of magnitude lower on the disturbed site. Overall, our results suggest that riparian soils are small N sources to high-Arctic streams and that a depleted dissolved organic C pool in disturbed soils may decrease exports to the adjacent streams under climate change projection.",
keywords = "net nitrification, net nitrogen mineralization, soil organic matter, soil respiration, thermo-erosion gully",
author = "Ada Pastor and S{\'i}lvia Poblador and Skovsholt, {Louis J.} and Tenna Riis",
year = "2020",
month = jan,
doi = "10.1002/ppp.2039",
language = "English",
volume = "31",
pages = "223--236",
journal = "Permafrost and Periglacial Processes",
issn = "1045-6740",
publisher = "JohnWiley & Sons Ltd.",
number = "1",

}

RIS

TY - JOUR

T1 - Microbial carbon and nitrogen processes in high-Arctic riparian soils

AU - Pastor, Ada

AU - Poblador, Sílvia

AU - Skovsholt, Louis J.

AU - Riis, Tenna

PY - 2020/1

Y1 - 2020/1

N2 - The aim of this work was to assess the biogeochemical role of riparian soils in the High Arctic to determine to what extent these soils may act as sources or sinks of carbon (C) and nitrogen (N). To do so, we compared two riparian areas that varied in riparian vegetation coverage and soil physical perturbation (i.e., thermo-erosion gully) in NE Greenland (74°N) during late summer. Microbial soil respiration (0.4–3.2 μmol CO2 m−2 s−1) was similar to values previously found across vegetation types in the same area and increased with higher temperatures, soil column depth and soil organic C degradation. Riparian soils had low nitrate concentrations (0.02–0.64 μg N-NO3 − g−1), negligible net nitrification rates and negative net N mineralization rates (−0.58 to 0.33 μg N g−1 day−1), thus indicating efficient microbial N uptake due to low N availability. We did not find any effects of physical perturbation on soil respiration or on N processing, but the dissolved fraction of organic matter in the soil was one order of magnitude lower on the disturbed site. Overall, our results suggest that riparian soils are small N sources to high-Arctic streams and that a depleted dissolved organic C pool in disturbed soils may decrease exports to the adjacent streams under climate change projection.

AB - The aim of this work was to assess the biogeochemical role of riparian soils in the High Arctic to determine to what extent these soils may act as sources or sinks of carbon (C) and nitrogen (N). To do so, we compared two riparian areas that varied in riparian vegetation coverage and soil physical perturbation (i.e., thermo-erosion gully) in NE Greenland (74°N) during late summer. Microbial soil respiration (0.4–3.2 μmol CO2 m−2 s−1) was similar to values previously found across vegetation types in the same area and increased with higher temperatures, soil column depth and soil organic C degradation. Riparian soils had low nitrate concentrations (0.02–0.64 μg N-NO3 − g−1), negligible net nitrification rates and negative net N mineralization rates (−0.58 to 0.33 μg N g−1 day−1), thus indicating efficient microbial N uptake due to low N availability. We did not find any effects of physical perturbation on soil respiration or on N processing, but the dissolved fraction of organic matter in the soil was one order of magnitude lower on the disturbed site. Overall, our results suggest that riparian soils are small N sources to high-Arctic streams and that a depleted dissolved organic C pool in disturbed soils may decrease exports to the adjacent streams under climate change projection.

KW - net nitrification, net nitrogen mineralization, soil organic matter, soil respiration, thermo-erosion gully

UR - http://www.scopus.com/inward/record.url?scp=85077859773&partnerID=8YFLogxK

U2 - 10.1002/ppp.2039

DO - 10.1002/ppp.2039

M3 - Journal article

AN - SCOPUS:85077859773

VL - 31

SP - 223

EP - 236

JO - Permafrost and Periglacial Processes

JF - Permafrost and Periglacial Processes

SN - 1045-6740

IS - 1

ER -