The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils
Global warming in the Arctic may alter decomposition rates in Arctic soils and therefore nutrient availability. In addition, changes in the length of the growing season may increase plant productivity and the rate of labile C input below ground. We carried out an experiment in which inorganic nutrie...
Published in: | Soil Biology and Biochemistry |
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Format: | Article in Journal/Newspaper |
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Online Access: | http://hdl.handle.net/1893/2561 https://doi.org/10.1016/j.soilbio.2009.10.004 http://dspace.stir.ac.uk/bitstream/1893/2561/1/Hartley_et_al%282010%29SBB.pdf |
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ftunivstirling:oai:dspace.stir.ac.uk:1893/2561 2023-05-15T14:26:44+02:00 The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils Hartley, Iain Hopkins, David Sommerkorn, Martin Wookey, Philip Biological and Environmental Sciences Macaulay Land Use Research Institute orcid:0000-0001-5957-6424 2010-01 application/pdf http://hdl.handle.net/1893/2561 https://doi.org/10.1016/j.soilbio.2009.10.004 http://dspace.stir.ac.uk/bitstream/1893/2561/1/Hartley_et_al%282010%29SBB.pdf en eng Elsevier Hartley I, Hopkins D, Sommerkorn M & Wookey P (2010) The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils. Soil Biology and Biochemistry, 42 (1), pp. 92-100. https://doi.org/10.1016/j.soilbio.2009.10.004 http://hdl.handle.net/1893/2561 doi:10.1016/j.soilbio.2009.10.004 WOS:000272858300011 2-s2.0-70449718759 832310 http://dspace.stir.ac.uk/bitstream/1893/2561/1/Hartley_et_al%282010%29SBB.pdf (C) 2009 Elsevier Ltd. All rights reserved; The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study. http://www.rioxx.net/licenses/under-embargo-all-rights-reserved 2999-12-10 [Hartley_et_al(2010)SBB.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work. Arctic Climate change Glucose Glycine Mountain birch Nitrogen Phosphorus Priming Soil respiration Tundra-heath Atmospheric carbon dioxide Environmental aspects Global environmental change Climatic changes Arctic regions Climatic changes Environmental aspects Journal Article VoR - Version of Record 2010 ftunivstirling https://doi.org/10.1016/j.soilbio.2009.10.004 2022-06-13T18:43:23Z Global warming in the Arctic may alter decomposition rates in Arctic soils and therefore nutrient availability. In addition, changes in the length of the growing season may increase plant productivity and the rate of labile C input below ground. We carried out an experiment in which inorganic nutrients (NH4NO3 and NaPO4) and organic substrates (glucose and glycine) were added to soils sampled from across the mountain birch forest-tundra heath ecotone in northern Sweden (organic and mineral soils from the forest. and organic soil only from the heath). Carbon dioxide production was then monitored continuously over the following 19 days. Neither inorganic N nor P additions substantially affected soil respiration rates when added separately. However, combined N and P additions stimulated microbial activity, with the response being greatest in the birch forest mineral soil (57% increase in CO2 production compared with 26% in the heath soil and 8% in the birch forest organic soil). Therefore, mineralisation rates in these soils may be stimulated if the overall nutrient availability to microbes increases in response to global change, but N deposition alone is unlikely to enhance decomposition. Adding either, or both, glucose and glycine increased microbial respiration. Isotopic separation indicated that the mineralisation of native soil organic matter (SOM) was stimulated by glucose addition in the heath soil and the forest mineral soil, but not in the forest organic soil. These positive 'priming' effects were lost following N addition in forest mineral soil, and following both N and P additions in the heath soil. In order to meet enhanced microbial nutrient demand, increased inputs of labile C from plants could stimulate the mineralisation of SOM, with the soil C stocks in the tundra-heath potentially most vulnerable. Article in Journal/Newspaper Arctic Arctic Climate change Global warming Northern Sweden Tundra University of Stirling: Stirling Digital Research Repository Arctic Soil Biology and Biochemistry 42 1 92 100 |
institution |
Open Polar |
collection |
University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
topic |
Arctic Climate change Glucose Glycine Mountain birch Nitrogen Phosphorus Priming Soil respiration Tundra-heath Atmospheric carbon dioxide Environmental aspects Global environmental change Climatic changes Arctic regions Climatic changes Environmental aspects |
spellingShingle |
Arctic Climate change Glucose Glycine Mountain birch Nitrogen Phosphorus Priming Soil respiration Tundra-heath Atmospheric carbon dioxide Environmental aspects Global environmental change Climatic changes Arctic regions Climatic changes Environmental aspects Hartley, Iain Hopkins, David Sommerkorn, Martin Wookey, Philip The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils |
topic_facet |
Arctic Climate change Glucose Glycine Mountain birch Nitrogen Phosphorus Priming Soil respiration Tundra-heath Atmospheric carbon dioxide Environmental aspects Global environmental change Climatic changes Arctic regions Climatic changes Environmental aspects |
description |
Global warming in the Arctic may alter decomposition rates in Arctic soils and therefore nutrient availability. In addition, changes in the length of the growing season may increase plant productivity and the rate of labile C input below ground. We carried out an experiment in which inorganic nutrients (NH4NO3 and NaPO4) and organic substrates (glucose and glycine) were added to soils sampled from across the mountain birch forest-tundra heath ecotone in northern Sweden (organic and mineral soils from the forest. and organic soil only from the heath). Carbon dioxide production was then monitored continuously over the following 19 days. Neither inorganic N nor P additions substantially affected soil respiration rates when added separately. However, combined N and P additions stimulated microbial activity, with the response being greatest in the birch forest mineral soil (57% increase in CO2 production compared with 26% in the heath soil and 8% in the birch forest organic soil). Therefore, mineralisation rates in these soils may be stimulated if the overall nutrient availability to microbes increases in response to global change, but N deposition alone is unlikely to enhance decomposition. Adding either, or both, glucose and glycine increased microbial respiration. Isotopic separation indicated that the mineralisation of native soil organic matter (SOM) was stimulated by glucose addition in the heath soil and the forest mineral soil, but not in the forest organic soil. These positive 'priming' effects were lost following N addition in forest mineral soil, and following both N and P additions in the heath soil. In order to meet enhanced microbial nutrient demand, increased inputs of labile C from plants could stimulate the mineralisation of SOM, with the soil C stocks in the tundra-heath potentially most vulnerable. |
author2 |
Biological and Environmental Sciences Macaulay Land Use Research Institute orcid:0000-0001-5957-6424 |
format |
Article in Journal/Newspaper |
author |
Hartley, Iain Hopkins, David Sommerkorn, Martin Wookey, Philip |
author_facet |
Hartley, Iain Hopkins, David Sommerkorn, Martin Wookey, Philip |
author_sort |
Hartley, Iain |
title |
The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils |
title_short |
The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils |
title_full |
The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils |
title_fullStr |
The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils |
title_full_unstemmed |
The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils |
title_sort |
response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils |
publisher |
Elsevier |
publishDate |
2010 |
url |
http://hdl.handle.net/1893/2561 https://doi.org/10.1016/j.soilbio.2009.10.004 http://dspace.stir.ac.uk/bitstream/1893/2561/1/Hartley_et_al%282010%29SBB.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Climate change Global warming Northern Sweden Tundra |
genre_facet |
Arctic Arctic Climate change Global warming Northern Sweden Tundra |
op_relation |
Hartley I, Hopkins D, Sommerkorn M & Wookey P (2010) The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils. Soil Biology and Biochemistry, 42 (1), pp. 92-100. https://doi.org/10.1016/j.soilbio.2009.10.004 http://hdl.handle.net/1893/2561 doi:10.1016/j.soilbio.2009.10.004 WOS:000272858300011 2-s2.0-70449718759 832310 http://dspace.stir.ac.uk/bitstream/1893/2561/1/Hartley_et_al%282010%29SBB.pdf |
op_rights |
(C) 2009 Elsevier Ltd. All rights reserved; The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study. http://www.rioxx.net/licenses/under-embargo-all-rights-reserved 2999-12-10 [Hartley_et_al(2010)SBB.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work. |
op_doi |
https://doi.org/10.1016/j.soilbio.2009.10.004 |
container_title |
Soil Biology and Biochemistry |
container_volume |
42 |
container_issue |
1 |
container_start_page |
92 |
op_container_end_page |
100 |
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1766300133027217408 |