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Amino acid production exceeds plant nitrogen demand in Siberian tundra

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Amino acid production exceeds plant nitrogen demand in Siberian tundra. / Wild, Birgit; Alves, Ricardo J. Eloy; Barta, Jiri et al.
In: Environmental Research Letters, Vol. 13, No. 3, 034002, 03.2018.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Wild, B, Alves, RJE, Barta, J, Capek, P, Gentsch, N, Guggenberger, G, Hugelius, G, Knoltsch, A, Kuhry, P, Lashchinskiy, N, Mikutta, R, Palmtag, J, Prommer, J, Schnecker, J, Shibistova, O, Takriti, M, Urich, T & Richter, A 2018, 'Amino acid production exceeds plant nitrogen demand in Siberian tundra', Environmental Research Letters, vol. 13, no. 3, 034002. https://doi.org/10.1088/1748-9326/aaa4fa

APA

Wild, B., Alves, R. J. E., Barta, J., Capek, P., Gentsch, N., Guggenberger, G., Hugelius, G., Knoltsch, A., Kuhry, P., Lashchinskiy, N., Mikutta, R., Palmtag, J., Prommer, J., Schnecker, J., Shibistova, O., Takriti, M., Urich, T., & Richter, A. (2018). Amino acid production exceeds plant nitrogen demand in Siberian tundra. Environmental Research Letters, 13(3), Article 034002. https://doi.org/10.1088/1748-9326/aaa4fa

Vancouver

Wild B, Alves RJE, Barta J, Capek P, Gentsch N, Guggenberger G et al. Amino acid production exceeds plant nitrogen demand in Siberian tundra. Environmental Research Letters. 2018 Mar;13(3):034002. Epub 2018 Feb 16. doi: 10.1088/1748-9326/aaa4fa

Author

Wild, Birgit ; Alves, Ricardo J. Eloy ; Barta, Jiri et al. / Amino acid production exceeds plant nitrogen demand in Siberian tundra. In: Environmental Research Letters. 2018 ; Vol. 13, No. 3.

Bibtex

@article{781ff912fdd84dc587dab07c75a8c639,
title = "Amino acid production exceeds plant nitrogen demand in Siberian tundra",
abstract = "Arctic plant productivity is often limited by low soil N availability. This has been attributed to slow breakdown of N-containing polymers in litter and soil organic matter (SOM) into smaller, available units, and to shallow plant rooting constrained by permafrost and high soil moisture. Using N-15 pool dilution assays, we here quantified gross amino acid and ammonium production rates in 97 active layer samples from four sites across the Siberian Arctic. We found that amino acid production in organic layers alone exceeded literature-based estimates of maximum plant N uptake 17-fold and therefore reject the hypothesis that arctic plant N limitation results from slow SOM breakdown. High microbial N use efficiency in organic layers rather suggests strong competition of microorganisms and plants in the dominant rooting zone. Deeper horizons showed lower amino acid production rates per volume, but also lower microbial N use efficiency. Permafrost thaw together with soil drainage might facilitate deeper plant rooting and uptake of previously inaccessible subsoil N, and thereby promote plant productivity in arctic ecosystems. We conclude that changes in microbial decomposer activity, microbial N utilization and plant root density with soil depth interactively control N availability for plants in the Arctic.",
keywords = "permafrost, tundra, protein depolymerization, nitrogen mineralization, nitrogen limitation, plant productivity, SUB-ARCTIC TUNDRA, SOIL-NITROGEN, ALASKAN TUNDRA, ORGANIC-MATTER, CLIMATE-CHANGE, SPECIES COMPOSITION, SEASONAL-VARIATION, MICROBIAL BIOMASS, ENZYME-ACTIVITIES, PERMAFROST SOILS",
author = "Birgit Wild and Alves, {Ricardo J. Eloy} and Jiri Barta and Petr Capek and Norman Gentsch and Georg Guggenberger and Gustaf Hugelius and Anna Knoltsch and Peter Kuhry and Nikolay Lashchinskiy and Robert Mikutta and Juri Palmtag and Judith Prommer and Joerg Schnecker and Olga Shibistova and Mounir Takriti and Tim Urich and Andreas Richter",
year = "2018",
month = mar,
doi = "10.1088/1748-9326/aaa4fa",
language = "English",
volume = "13",
journal = "Environmental Research Letters",
issn = "1748-9326",
publisher = "IOP Publishing Ltd",
number = "3",

}

RIS

TY - JOUR

T1 - Amino acid production exceeds plant nitrogen demand in Siberian tundra

AU - Wild, Birgit

AU - Alves, Ricardo J. Eloy

AU - Barta, Jiri

AU - Capek, Petr

AU - Gentsch, Norman

AU - Guggenberger, Georg

AU - Hugelius, Gustaf

AU - Knoltsch, Anna

AU - Kuhry, Peter

AU - Lashchinskiy, Nikolay

AU - Mikutta, Robert

AU - Palmtag, Juri

AU - Prommer, Judith

AU - Schnecker, Joerg

AU - Shibistova, Olga

AU - Takriti, Mounir

AU - Urich, Tim

AU - Richter, Andreas

PY - 2018/3

Y1 - 2018/3

N2 - Arctic plant productivity is often limited by low soil N availability. This has been attributed to slow breakdown of N-containing polymers in litter and soil organic matter (SOM) into smaller, available units, and to shallow plant rooting constrained by permafrost and high soil moisture. Using N-15 pool dilution assays, we here quantified gross amino acid and ammonium production rates in 97 active layer samples from four sites across the Siberian Arctic. We found that amino acid production in organic layers alone exceeded literature-based estimates of maximum plant N uptake 17-fold and therefore reject the hypothesis that arctic plant N limitation results from slow SOM breakdown. High microbial N use efficiency in organic layers rather suggests strong competition of microorganisms and plants in the dominant rooting zone. Deeper horizons showed lower amino acid production rates per volume, but also lower microbial N use efficiency. Permafrost thaw together with soil drainage might facilitate deeper plant rooting and uptake of previously inaccessible subsoil N, and thereby promote plant productivity in arctic ecosystems. We conclude that changes in microbial decomposer activity, microbial N utilization and plant root density with soil depth interactively control N availability for plants in the Arctic.

AB - Arctic plant productivity is often limited by low soil N availability. This has been attributed to slow breakdown of N-containing polymers in litter and soil organic matter (SOM) into smaller, available units, and to shallow plant rooting constrained by permafrost and high soil moisture. Using N-15 pool dilution assays, we here quantified gross amino acid and ammonium production rates in 97 active layer samples from four sites across the Siberian Arctic. We found that amino acid production in organic layers alone exceeded literature-based estimates of maximum plant N uptake 17-fold and therefore reject the hypothesis that arctic plant N limitation results from slow SOM breakdown. High microbial N use efficiency in organic layers rather suggests strong competition of microorganisms and plants in the dominant rooting zone. Deeper horizons showed lower amino acid production rates per volume, but also lower microbial N use efficiency. Permafrost thaw together with soil drainage might facilitate deeper plant rooting and uptake of previously inaccessible subsoil N, and thereby promote plant productivity in arctic ecosystems. We conclude that changes in microbial decomposer activity, microbial N utilization and plant root density with soil depth interactively control N availability for plants in the Arctic.

KW - permafrost

KW - tundra

KW - protein depolymerization

KW - nitrogen mineralization

KW - nitrogen limitation

KW - plant productivity

KW - SUB-ARCTIC TUNDRA

KW - SOIL-NITROGEN

KW - ALASKAN TUNDRA

KW - ORGANIC-MATTER

KW - CLIMATE-CHANGE

KW - SPECIES COMPOSITION

KW - SEASONAL-VARIATION

KW - MICROBIAL BIOMASS

KW - ENZYME-ACTIVITIES

KW - PERMAFROST SOILS

U2 - 10.1088/1748-9326/aaa4fa

DO - 10.1088/1748-9326/aaa4fa

M3 - Journal article

VL - 13

JO - Environmental Research Letters

JF - Environmental Research Letters

SN - 1748-9326

IS - 3

M1 - 034002

ER -