Carbon accumulation in peatlands, southwestern Northwest Territories, Canada
Northern peatlands have stored significant quantities of carbon (C) since the early Holocene at rates that vary among peatland types. Pollen concentration dating was used to provide estimates o f true C accumulation and sequestration efficiency in different peatland systems in the discontinuous perm...
Published in: | Canadian Journal of Soil Science |
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crcansciencepubl:10.4141/s05-086 2023-12-17T10:30:18+01:00 Carbon accumulation in peatlands, southwestern Northwest Territories, Canada Robinson, Stephen D. 2006 http://dx.doi.org/10.4141/s05-086 http://www.nrcresearchpress.com/doi/pdf/10.4141/S05-086 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Soil Science volume 86, issue Special Issue, page 305-319 ISSN 0008-4271 1918-1841 Soil Science journal-article 2006 crcansciencepubl https://doi.org/10.4141/s05-086 2023-11-19T13:38:23Z Northern peatlands have stored significant quantities of carbon (C) since the early Holocene at rates that vary among peatland types. Pollen concentration dating was used to provide estimates o f true C accumulation and sequestration efficiency in different peatland systems in the discontinuous permafrost zone near Fort Simpson, Northwest Territories, Canada. The catotelm portions of bog, permafrost-affected peat plateau, and Sphagnum-dominated cores were interpreted to conform to Clymo’s (1984) model of C accumulation, while peat deposited under conditions with high water tables (rich fen and collapse fen) did not. The model assumes a consistent surface production, yet production in fens is thought to be highly sensitive to water table changes and may have contributed to poor model fits. Decay rates measured over the past 1200 yr range from 0.0015 to 0.0004 yr -1 . True C accumulation rates (range 7.0 in peat plateau to 18.6 g C m -2 yr -1 in bog) and sequestration efficiencies (range 0.24 in peat plateau to 0.67 in poor fen) by 1200 yr BP were low in comparison with other North American sites. Decay rates measured over 1200 yr were significantly greater than that measured over the entire life span of the peatland (0.00033 yr -1 ), suggesting that a catotelm true C accumulation model incorporating a decreasing rate of decay would be more applicable. Key words: Carbon accumulation, peatlands, permafrost, northern Canada Article in Journal/Newspaper Fort Simpson Northwest Territories Peat Peat plateau permafrost Canadian Science Publishing (via Crossref) Northwest Territories Canada Fort Simpson ENVELOPE(-121.320,-121.320,61.808,61.808) Canadian Journal of Soil Science 86 Special Issue 305 319 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
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English |
topic |
Soil Science |
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Soil Science Robinson, Stephen D. Carbon accumulation in peatlands, southwestern Northwest Territories, Canada |
topic_facet |
Soil Science |
description |
Northern peatlands have stored significant quantities of carbon (C) since the early Holocene at rates that vary among peatland types. Pollen concentration dating was used to provide estimates o f true C accumulation and sequestration efficiency in different peatland systems in the discontinuous permafrost zone near Fort Simpson, Northwest Territories, Canada. The catotelm portions of bog, permafrost-affected peat plateau, and Sphagnum-dominated cores were interpreted to conform to Clymo’s (1984) model of C accumulation, while peat deposited under conditions with high water tables (rich fen and collapse fen) did not. The model assumes a consistent surface production, yet production in fens is thought to be highly sensitive to water table changes and may have contributed to poor model fits. Decay rates measured over the past 1200 yr range from 0.0015 to 0.0004 yr -1 . True C accumulation rates (range 7.0 in peat plateau to 18.6 g C m -2 yr -1 in bog) and sequestration efficiencies (range 0.24 in peat plateau to 0.67 in poor fen) by 1200 yr BP were low in comparison with other North American sites. Decay rates measured over 1200 yr were significantly greater than that measured over the entire life span of the peatland (0.00033 yr -1 ), suggesting that a catotelm true C accumulation model incorporating a decreasing rate of decay would be more applicable. Key words: Carbon accumulation, peatlands, permafrost, northern Canada |
format |
Article in Journal/Newspaper |
author |
Robinson, Stephen D. |
author_facet |
Robinson, Stephen D. |
author_sort |
Robinson, Stephen D. |
title |
Carbon accumulation in peatlands, southwestern Northwest Territories, Canada |
title_short |
Carbon accumulation in peatlands, southwestern Northwest Territories, Canada |
title_full |
Carbon accumulation in peatlands, southwestern Northwest Territories, Canada |
title_fullStr |
Carbon accumulation in peatlands, southwestern Northwest Territories, Canada |
title_full_unstemmed |
Carbon accumulation in peatlands, southwestern Northwest Territories, Canada |
title_sort |
carbon accumulation in peatlands, southwestern northwest territories, canada |
publisher |
Canadian Science Publishing |
publishDate |
2006 |
url |
http://dx.doi.org/10.4141/s05-086 http://www.nrcresearchpress.com/doi/pdf/10.4141/S05-086 |
long_lat |
ENVELOPE(-121.320,-121.320,61.808,61.808) |
geographic |
Northwest Territories Canada Fort Simpson |
geographic_facet |
Northwest Territories Canada Fort Simpson |
genre |
Fort Simpson Northwest Territories Peat Peat plateau permafrost |
genre_facet |
Fort Simpson Northwest Territories Peat Peat plateau permafrost |
op_source |
Canadian Journal of Soil Science volume 86, issue Special Issue, page 305-319 ISSN 0008-4271 1918-1841 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.4141/s05-086 |
container_title |
Canadian Journal of Soil Science |
container_volume |
86 |
container_issue |
Special Issue |
container_start_page |
305 |
op_container_end_page |
319 |
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1785583238301876224 |