Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada
Fujii, K., Morioka, K., Hangs, R., Funakawa, S., Kosaki, and Anderson, D. W. 2013. Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada. Can. J. Soil Sci. 93: 295–304. Organic acids released by lichen play an important role in mineral we...
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crcansciencepubl:10.4141/cjss2012-108 2024-06-23T07:57:18+00:00 Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada Fujii, Kazumichi Morioka, Kokoro Hangs, Ryan Funakawa, Shinya Kosaki, Takashi Anderson, Darwin W. 2013 http://dx.doi.org/10.4141/cjss2012-108 http://www.nrcresearchpress.com/doi/full-xml/10.4141/cjss2012-108 http://www.nrcresearchpress.com/doi/pdf/10.4141/cjss2012-108 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Soil Science volume 93, issue 3, page 295-304 ISSN 0008-4271 1918-1841 journal-article 2013 crcansciencepubl https://doi.org/10.4141/cjss2012-108 2024-05-24T13:05:52Z Fujii, K., Morioka, K., Hangs, R., Funakawa, S., Kosaki, and Anderson, D. W. 2013. Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada. Can. J. Soil Sci. 93: 295–304. Organic acids released by lichen play an important role in mineral weathering and podzolization in the Boreal–Tundra transition zone of Canada; however, importance of low-molecular-weight organic acids in the soil carbon (C) cycle in the black spruce–lichen forests remains unclear. We examined soil solution composition and mineralization kinetics of 14 C-radiolabelled oxalate and citrate to quantify the C fluxes from organic acid mineralization in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan. Oxalate concentration in soil solution was greatest in the lichen layer, while the high levels of citrate were observed in the lichen and organic (O) layers to the Ae horizon with the lowest sorption capacity. Oxalate and citrate were rapidly mineralized within the lichen and O layers and had short mean residence times (0.5 to 2.7 h). Substantial C fluxes due to citrate mineralization were observed both within the lichen and O layers, but oxalate mineralization led to C flux in the lichen layer only. The contribution of citrate and oxalate to microbial respiration was large (up to 57%) in the surface soil layers. Citrate was the dominant substrate for microbial respiration of the surface soil; however, it appears that oxalate could also be an important microbial substrate within the lichen layer, at least in summer months. We conclude that the exudation of low-molecular-weight organic acids by lichenous fungi, followed by their rapid mineralization, could play an important role in the C cycles of the sandy soils under spruce–lichen forest. Article in Journal/Newspaper Tundra Canadian Science Publishing Canada Canadian Journal of Soil Science 93 3 295 304 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Fujii, K., Morioka, K., Hangs, R., Funakawa, S., Kosaki, and Anderson, D. W. 2013. Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada. Can. J. Soil Sci. 93: 295–304. Organic acids released by lichen play an important role in mineral weathering and podzolization in the Boreal–Tundra transition zone of Canada; however, importance of low-molecular-weight organic acids in the soil carbon (C) cycle in the black spruce–lichen forests remains unclear. We examined soil solution composition and mineralization kinetics of 14 C-radiolabelled oxalate and citrate to quantify the C fluxes from organic acid mineralization in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan. Oxalate concentration in soil solution was greatest in the lichen layer, while the high levels of citrate were observed in the lichen and organic (O) layers to the Ae horizon with the lowest sorption capacity. Oxalate and citrate were rapidly mineralized within the lichen and O layers and had short mean residence times (0.5 to 2.7 h). Substantial C fluxes due to citrate mineralization were observed both within the lichen and O layers, but oxalate mineralization led to C flux in the lichen layer only. The contribution of citrate and oxalate to microbial respiration was large (up to 57%) in the surface soil layers. Citrate was the dominant substrate for microbial respiration of the surface soil; however, it appears that oxalate could also be an important microbial substrate within the lichen layer, at least in summer months. We conclude that the exudation of low-molecular-weight organic acids by lichenous fungi, followed by their rapid mineralization, could play an important role in the C cycles of the sandy soils under spruce–lichen forest. |
format |
Article in Journal/Newspaper |
author |
Fujii, Kazumichi Morioka, Kokoro Hangs, Ryan Funakawa, Shinya Kosaki, Takashi Anderson, Darwin W. |
spellingShingle |
Fujii, Kazumichi Morioka, Kokoro Hangs, Ryan Funakawa, Shinya Kosaki, Takashi Anderson, Darwin W. Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada |
author_facet |
Fujii, Kazumichi Morioka, Kokoro Hangs, Ryan Funakawa, Shinya Kosaki, Takashi Anderson, Darwin W. |
author_sort |
Fujii, Kazumichi |
title |
Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada |
title_short |
Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada |
title_full |
Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada |
title_fullStr |
Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada |
title_full_unstemmed |
Rapid turnover of organic acids in a Dystric Brunisol under a spruce–lichen forest in northern Saskatchewan, Canada |
title_sort |
rapid turnover of organic acids in a dystric brunisol under a spruce–lichen forest in northern saskatchewan, canada |
publisher |
Canadian Science Publishing |
publishDate |
2013 |
url |
http://dx.doi.org/10.4141/cjss2012-108 http://www.nrcresearchpress.com/doi/full-xml/10.4141/cjss2012-108 http://www.nrcresearchpress.com/doi/pdf/10.4141/cjss2012-108 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
Canadian Journal of Soil Science volume 93, issue 3, page 295-304 ISSN 0008-4271 1918-1841 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.4141/cjss2012-108 |
container_title |
Canadian Journal of Soil Science |
container_volume |
93 |
container_issue |
3 |
container_start_page |
295 |
op_container_end_page |
304 |
_version_ |
1802650884169007104 |