Carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ C-14 pulse-labelling
In this study we quantify the partitioning of recent assimilates to above- and below-ground carbon (C) pools in two subarctic mire ecosystems - wet minerotrophic and semiwet ombrotrophic mire - using in situ C-14 pulse-labelling. Ecosystem C partitioning to rhizomes, coarse roots, fine roots, dissol...
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2011
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Online Access: | https://lup.lub.lu.se/record/1868841 https://doi.org/10.1016/j.soilbio.2010.09.034 |
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ftulundlup:oai:lup.lub.lu.se:f1b5fa9f-7e71-4cf0-a602-1515a1f80b92 2023-05-15T18:28:00+02:00 Carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ C-14 pulse-labelling Olsrud, Maria Christensen, Torben 2011 https://lup.lub.lu.se/record/1868841 https://doi.org/10.1016/j.soilbio.2010.09.034 eng eng Elsevier https://lup.lub.lu.se/record/1868841 http://dx.doi.org/10.1016/j.soilbio.2010.09.034 wos:000286967800002 scopus:78650678827 Soil Biology & Biochemistry; 43(2), pp 231-239 (2011) ISSN: 0038-0717 Physical Geography Below-ground C-14 pulse-labelling Carbon allocation Carex rotundata Eriophorum angustifolium Minerotrophic Mire ecosystem Ombrotrophic Subarctic contributiontojournal/article info:eu-repo/semantics/article text 2011 ftulundlup https://doi.org/10.1016/j.soilbio.2010.09.034 2023-02-01T23:26:57Z In this study we quantify the partitioning of recent assimilates to above- and below-ground carbon (C) pools in two subarctic mire ecosystems - wet minerotrophic and semiwet ombrotrophic mire - using in situ C-14 pulse-labelling. Ecosystem C partitioning to rhizomes, coarse roots, fine roots, dissolved organic carbon (DOC) and microbes were quantified twice during the growing season at three different soil depths. Finally the C-14-partitioning data from this and a previous study were combined to estimate the overall C partitioning of the three main vegetation types of a Scandinavian subarctic mire in early and late summer. The semiwet ombrotrophic ecosystem hosted a much larger root biomass on an area basis compared to the wet minerotrophic ecosystem which might be due to differences in the soil nutrient level. Microbial C was found to be the largest C-pool in both ecosystems. Ecosystem C-14 partitioning was poorly related to plant biomass for the semiwet and the wet ecosystem. Overall a higher partitioning of recent assimilates to below-ground compartments was apparent in August-September compared to June-July, while the opposite was found for the above-ground C-pools. In the semiwet ecosystem twice as much C-14 was found in DOC compared to the wet ecosystem, where root density, litter and above-ground biomass were important controls of the C-14-recovery in DOC. Plant-derived DOC was estimated to be 15.4 versus 12.9 mg C m(-2) d(-1) in the semiwet and wet ecosystem, respectively. Graminoid dominated and dwarf shrub dominated vegetation types of the subarctic mire Stordalen differ with respect to the relative amount of recently assimilated C partitioned to C-pools with "slow" versus "fast" decomposition rate. The capacity for sequestration of recently fixed C within "slow" C-pools might affect the ecosystem C balance (NEE) and C-storage. The potential for vegetation changes might therefore be an important factor to consider in studies of response of ecosystem C-dynamics to global change factors in subarctic ... Article in Journal/Newspaper Subarctic Lund University Publications (LUP) Stordalen ENVELOPE(7.337,7.337,62.510,62.510) Soil Biology and Biochemistry 43 2 231 239 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography Below-ground C-14 pulse-labelling Carbon allocation Carex rotundata Eriophorum angustifolium Minerotrophic Mire ecosystem Ombrotrophic Subarctic |
spellingShingle |
Physical Geography Below-ground C-14 pulse-labelling Carbon allocation Carex rotundata Eriophorum angustifolium Minerotrophic Mire ecosystem Ombrotrophic Subarctic Olsrud, Maria Christensen, Torben Carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ C-14 pulse-labelling |
topic_facet |
Physical Geography Below-ground C-14 pulse-labelling Carbon allocation Carex rotundata Eriophorum angustifolium Minerotrophic Mire ecosystem Ombrotrophic Subarctic |
description |
In this study we quantify the partitioning of recent assimilates to above- and below-ground carbon (C) pools in two subarctic mire ecosystems - wet minerotrophic and semiwet ombrotrophic mire - using in situ C-14 pulse-labelling. Ecosystem C partitioning to rhizomes, coarse roots, fine roots, dissolved organic carbon (DOC) and microbes were quantified twice during the growing season at three different soil depths. Finally the C-14-partitioning data from this and a previous study were combined to estimate the overall C partitioning of the three main vegetation types of a Scandinavian subarctic mire in early and late summer. The semiwet ombrotrophic ecosystem hosted a much larger root biomass on an area basis compared to the wet minerotrophic ecosystem which might be due to differences in the soil nutrient level. Microbial C was found to be the largest C-pool in both ecosystems. Ecosystem C-14 partitioning was poorly related to plant biomass for the semiwet and the wet ecosystem. Overall a higher partitioning of recent assimilates to below-ground compartments was apparent in August-September compared to June-July, while the opposite was found for the above-ground C-pools. In the semiwet ecosystem twice as much C-14 was found in DOC compared to the wet ecosystem, where root density, litter and above-ground biomass were important controls of the C-14-recovery in DOC. Plant-derived DOC was estimated to be 15.4 versus 12.9 mg C m(-2) d(-1) in the semiwet and wet ecosystem, respectively. Graminoid dominated and dwarf shrub dominated vegetation types of the subarctic mire Stordalen differ with respect to the relative amount of recently assimilated C partitioned to C-pools with "slow" versus "fast" decomposition rate. The capacity for sequestration of recently fixed C within "slow" C-pools might affect the ecosystem C balance (NEE) and C-storage. The potential for vegetation changes might therefore be an important factor to consider in studies of response of ecosystem C-dynamics to global change factors in subarctic ... |
format |
Article in Journal/Newspaper |
author |
Olsrud, Maria Christensen, Torben |
author_facet |
Olsrud, Maria Christensen, Torben |
author_sort |
Olsrud, Maria |
title |
Carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ C-14 pulse-labelling |
title_short |
Carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ C-14 pulse-labelling |
title_full |
Carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ C-14 pulse-labelling |
title_fullStr |
Carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ C-14 pulse-labelling |
title_full_unstemmed |
Carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ C-14 pulse-labelling |
title_sort |
carbon partitioning in a wet and a semiwet subarctic mire ecosystem based on in situ c-14 pulse-labelling |
publisher |
Elsevier |
publishDate |
2011 |
url |
https://lup.lub.lu.se/record/1868841 https://doi.org/10.1016/j.soilbio.2010.09.034 |
long_lat |
ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Stordalen |
geographic_facet |
Stordalen |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Soil Biology & Biochemistry; 43(2), pp 231-239 (2011) ISSN: 0038-0717 |
op_relation |
https://lup.lub.lu.se/record/1868841 http://dx.doi.org/10.1016/j.soilbio.2010.09.034 wos:000286967800002 scopus:78650678827 |
op_doi |
https://doi.org/10.1016/j.soilbio.2010.09.034 |
container_title |
Soil Biology and Biochemistry |
container_volume |
43 |
container_issue |
2 |
container_start_page |
231 |
op_container_end_page |
239 |
_version_ |
1766210293531148288 |