Articles | Volume 6, issue 1
https://doi.org/10.5194/soil-6-115-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/soil-6-115-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Original research article
| 
23 Mar 2020
Original research article |
| 23 Mar 2020
| 23 Mar 2020
Depletion of soil carbon and aggregation after strong warming of a subarctic Andosol under forest and grassland cover
Christopher Poeplau
CORRESPONDING AUTHOR
Thünen Institute of Climate-Smart Agriculture, Bundesallee 68,
38116 Braunschweig, Germany
Páll Sigurðsson
Agricultural University of Iceland, Hvanneyri 311, Borgarnes,
Iceland
Bjarni D. Sigurdsson
Agricultural University of Iceland, Hvanneyri 311, Borgarnes,
Iceland
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V. Marteinsson, A. Klonowski, E. Reynisson, P. Vannier, B. D. Sigurdsson, and M. Ólafsson
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N. I. W. Leblans, B. D. Sigurdsson, P. Roefs, R. Thuys, B. Magnússon, and I. A. Janssens
Biogeosciences, 11, 6237–6250, https://doi.org/10.5194/bg-11-6237-2014, https://doi.org/10.5194/bg-11-6237-2014, 2014
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We studied the influence of allochthonous N inputs on primary succession and soil development of a 50-year-old volcanic island, Surtsey. Seabirds increased the ecosystem N accumulation rate inside their colony to ~47 kg ha-1 y-1, compared to 0.7 kg ha-1 y-1 outside it. A strong relationship was found between total ecosystem N stock and both total above- and belowground biomass and SOC stock, which shows how fast external N input can boost primary succession and soil formation.
G. Stefansdottir, A. L. Aradottir, and B. D. Sigurdsson
Biogeosciences, 11, 5763–5771, https://doi.org/10.5194/bg-11-5763-2014, https://doi.org/10.5194/bg-11-5763-2014, 2014
B. Magnússon, S. H. Magnússon, E. Ólafsson, and B. D. Sigurdsson
Biogeosciences, 11, 5521–5537, https://doi.org/10.5194/bg-11-5521-2014, https://doi.org/10.5194/bg-11-5521-2014, 2014
K. Ilieva-Makulec, B. Bjarnadottir, and B. D. Sigurdsson
Biogeosciences Discuss., https://doi.org/10.5194/bgd-11-14239-2014, https://doi.org/10.5194/bgd-11-14239-2014, 2014
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Short summary
Short summary
Using ranges for variables in a model of organic C stocks of the top 1m of soil on a global 0.5° grid, we assessed the (un)certainty of changes in stocks over the next 75 years. Changes are more certain where land-use change strongly affects carbon inputs and where higher temperatures and adequate moisture favour decomposition, e.g. tropical mountain forests. Global stocks will increase by 1% with a certainty of 75% if inputs to the soil increase due to CO₂ fertilization of the vegetation.
P. Alexander, K. Paustian, P. Smith, and D. Moran
SOIL, 1, 331–339, https://doi.org/10.5194/soil-1-331-2015, https://doi.org/10.5194/soil-1-331-2015, 2015
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Short summary
Global warming leads to increased mineralisation of soil organic matter, inducing a positive climate–carbon cycle feedback loop. Loss of organic matter can be associated with loss of soil structure. Here we use a strong geothermal gradient to investigate soil warming effects on soil organic matter and structural parameters in subarctic forest and grassland soils. Strong depletion of organic matter caused a collapse of aggregates, highlighting the potential impact of warming on soil function.
Global warming leads to increased mineralisation of soil organic matter, inducing a positive...
