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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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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Research was conducted to assess the response of microbial communities in a soil with a long history of glyphosate-based herbicides to a secondary imposed perturbation (dry–rewetting event). Both perturbations could increase their frequency under current agricultural practices and climate change. The results of this study demonstrate that acute exposure to a glyphosate-based herbicide does not have a conditioning effect on the response of microbial communities to the dry–rewetting event.
Natalia Andrea Osinaga, Carina Rosa Álvarez, and Miguel Angel Taboada
SOIL, 4, 251–257, https://doi.org/10.5194/soil-4-251-2018, https://doi.org/10.5194/soil-4-251-2018, 2018
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The sub-humid Argentine Chaco, originally covered by forest, has been subjected to clearing since the end of the 1970s and replacement of the forest by no-till farming. The organic carbon stock content up to 1 m depth varied as follows: forest > pasture > continuous cropping, with no impact of the number of years under cropping. The incorporation of pastures of warm-season grasses was able to mitigate the decrease of C stocks caused by cropping and so could be considered sustainable management.
Justine Barthod, Cornélia Rumpel, Remigio Paradelo, and Marie-France Dignac
SOIL, 2, 673–683, https://doi.org/10.5194/soil-2-673-2016, https://doi.org/10.5194/soil-2-673-2016, 2016
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In this study we evaluated CO2 emissions during composting of green wastes with clay and/or biochar in the presence and absence of worms, as well as the effect of those amendments on carbon mineralization after application to soil. Our results indicated that the addition of clay or clay–biochar mixture reduced carbon mineralization during co-composting without worms by up to 44 %. In the presence of worms, CO2 emissions during composting increased for all treatments except for the low clay dose.
Miriam Muñoz-Rojas, Todd E. Erickson, Dylan C. Martini, Kingsley W. Dixon, and David J. Merritt
SOIL, 2, 287–298, https://doi.org/10.5194/soil-2-287-2016, https://doi.org/10.5194/soil-2-287-2016, 2016
M. S. Torn, A. Chabbi, P. Crill, P. J. Hanson, I. A. Janssens, Y. Luo, C. H. Pries, C. Rumpel, M. W. I. Schmidt, J. Six, M. Schrumpf, and B. Zhu
SOIL, 1, 575–582, https://doi.org/10.5194/soil-1-575-2015, https://doi.org/10.5194/soil-1-575-2015, 2015
M. Köchy, A. Don, M. K. van der Molen, and A. Freibauer
SOIL, 1, 367–380, https://doi.org/10.5194/soil-1-367-2015, https://doi.org/10.5194/soil-1-367-2015, 2015
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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...
