Peatland succession and long-term apparent carbon accumulation in central and northern Ontario, Canada
Despite their importance as globally significant carbon (C) stores, basic knowledge of post-glacial peatland history and C accumulation are lacking for the Canadian Boreal Shield and James Bay Lowland (JBL) of central and northern Ontario, Canada. Radiocarbon dates, plant macrofossil analysis, and s...
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crsagepubl:10.1177/0959683614538074 2023-05-15T16:37:47+02:00 Peatland succession and long-term apparent carbon accumulation in central and northern Ontario, Canada Holmquist, James R MacDonald, Glen M 2014 http://dx.doi.org/10.1177/0959683614538074 http://journals.sagepub.com/doi/pdf/10.1177/0959683614538074 http://journals.sagepub.com/doi/full-xml/10.1177/0959683614538074 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 24, issue 9, page 1075-1089 ISSN 0959-6836 1477-0911 Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change journal-article 2014 crsagepubl https://doi.org/10.1177/0959683614538074 2022-09-21T19:47:12Z Despite their importance as globally significant carbon (C) stores, basic knowledge of post-glacial peatland history and C accumulation are lacking for the Canadian Boreal Shield and James Bay Lowland (JBL) of central and northern Ontario, Canada. Radiocarbon dates, plant macrofossil analysis, and soil C estimates from an eight-core transect of the JBL and surrounding regions are used to reconstruct the timings and patterns of fen to bog transitions, and the ranges and patterns of long-term apparent rate of C accumulation (LARCA). Peatland initiation lagged the retreat of the Laurentide ice sheet, the drainage of glacial lakes, and isostatic uplift by 810–6050 years. Transition from Carex-dominated fen to Sphagnum-dominated bog had a median timing of 3500 years following peatland establishment and ranged from 640 to 6970 years. LARCA was variable geographically and over time with median values ranging from 13.4 to 31.6 g C/m 2 /yr. LARCA anomalies were generally high ~6.1 kyr (kyr = 1000 calibrated years before present (cal. yr BP)) for southern sites, and ~2.5 kyr for the most northern sites, and may be associated with elevated moisture as inferred from a brief review of regional proxy reconstructions. Some sites displayed high LARCA anomalies, changes in plant ecology, or southern site initiation, which may have also been driven by a moist Hypsithermal Period occurring ~4.5 kyr. LARCA increases were not generally associated with high-temperature anomalies during the warm ‘Medieval Climate Anomaly’ compared with the cooler ‘Little Ice Age’; however, there is evidence that the establishment of modern permafrost during the late-Holocene negatively affected C accumulation. Article in Journal/Newspaper Ice Ice Sheet permafrost James Bay SAGE Publications (via Crossref) Canada The Holocene 24 9 1075 1089 |
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Open Polar |
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SAGE Publications (via Crossref) |
op_collection_id |
crsagepubl |
language |
English |
topic |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
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Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change Holmquist, James R MacDonald, Glen M Peatland succession and long-term apparent carbon accumulation in central and northern Ontario, Canada |
topic_facet |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
description |
Despite their importance as globally significant carbon (C) stores, basic knowledge of post-glacial peatland history and C accumulation are lacking for the Canadian Boreal Shield and James Bay Lowland (JBL) of central and northern Ontario, Canada. Radiocarbon dates, plant macrofossil analysis, and soil C estimates from an eight-core transect of the JBL and surrounding regions are used to reconstruct the timings and patterns of fen to bog transitions, and the ranges and patterns of long-term apparent rate of C accumulation (LARCA). Peatland initiation lagged the retreat of the Laurentide ice sheet, the drainage of glacial lakes, and isostatic uplift by 810–6050 years. Transition from Carex-dominated fen to Sphagnum-dominated bog had a median timing of 3500 years following peatland establishment and ranged from 640 to 6970 years. LARCA was variable geographically and over time with median values ranging from 13.4 to 31.6 g C/m 2 /yr. LARCA anomalies were generally high ~6.1 kyr (kyr = 1000 calibrated years before present (cal. yr BP)) for southern sites, and ~2.5 kyr for the most northern sites, and may be associated with elevated moisture as inferred from a brief review of regional proxy reconstructions. Some sites displayed high LARCA anomalies, changes in plant ecology, or southern site initiation, which may have also been driven by a moist Hypsithermal Period occurring ~4.5 kyr. LARCA increases were not generally associated with high-temperature anomalies during the warm ‘Medieval Climate Anomaly’ compared with the cooler ‘Little Ice Age’; however, there is evidence that the establishment of modern permafrost during the late-Holocene negatively affected C accumulation. |
format |
Article in Journal/Newspaper |
author |
Holmquist, James R MacDonald, Glen M |
author_facet |
Holmquist, James R MacDonald, Glen M |
author_sort |
Holmquist, James R |
title |
Peatland succession and long-term apparent carbon accumulation in central and northern Ontario, Canada |
title_short |
Peatland succession and long-term apparent carbon accumulation in central and northern Ontario, Canada |
title_full |
Peatland succession and long-term apparent carbon accumulation in central and northern Ontario, Canada |
title_fullStr |
Peatland succession and long-term apparent carbon accumulation in central and northern Ontario, Canada |
title_full_unstemmed |
Peatland succession and long-term apparent carbon accumulation in central and northern Ontario, Canada |
title_sort |
peatland succession and long-term apparent carbon accumulation in central and northern ontario, canada |
publisher |
SAGE Publications |
publishDate |
2014 |
url |
http://dx.doi.org/10.1177/0959683614538074 http://journals.sagepub.com/doi/pdf/10.1177/0959683614538074 http://journals.sagepub.com/doi/full-xml/10.1177/0959683614538074 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Ice Ice Sheet permafrost James Bay |
genre_facet |
Ice Ice Sheet permafrost James Bay |
op_source |
The Holocene volume 24, issue 9, page 1075-1089 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683614538074 |
container_title |
The Holocene |
container_volume |
24 |
container_issue |
9 |
container_start_page |
1075 |
op_container_end_page |
1089 |
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1766028080979116032 |