Tree biomass reconstruction shows no lag in postglacial afforestation of eastern Canada
Forest ecosystems in eastern Canada are particularly sensitive to climate change and may shift from carbon sinks to carbon sources in the coming decades. Understanding how forest biomass responded to past climate change is thus of crucial interest, but past biomass reconstruction still represents a...
Published in: | Canadian Journal of Forest Research |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2016
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/cjfr-2015-0201 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfr-2015-0201 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfr-2015-0201 |
id |
crcansciencepubl:10.1139/cjfr-2015-0201 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/cjfr-2015-0201 2024-09-09T19:45:28+00:00 Tree biomass reconstruction shows no lag in postglacial afforestation of eastern Canada Blarquez, Olivier Aleman, Julie C. 2016 http://dx.doi.org/10.1139/cjfr-2015-0201 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfr-2015-0201 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfr-2015-0201 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 46, issue 4, page 485-498 ISSN 0045-5067 1208-6037 journal-article 2016 crcansciencepubl https://doi.org/10.1139/cjfr-2015-0201 2024-06-20T04:11:53Z Forest ecosystems in eastern Canada are particularly sensitive to climate change and may shift from carbon sinks to carbon sources in the coming decades. Understanding how forest biomass responded to past climate change is thus of crucial interest, but past biomass reconstruction still represents a challenge. Here we used transfer functions based on modern pollen assemblages and remotely sensed biomass estimation to reconstruct and quantify, for the last 14 000 years, tree biomass dynamics for the six main tree genera of the boreal and mixedwood forests (Abies, Acer, Betula, Picea, Pinus, Populus). We compared the mean genera and total biomass with climatic (summer temperatures and annual precipitation), physical (CO 2 , insolation, ice area), and disturbance (burned biomass) variables to identify the potential drivers influencing the long-term trends in tree biomass. For most genera, tree biomass was related to summer temperature, insolation, and CO 2 levels; Picea was the exception and its biomass also correlated with annual precipitation. At the onset of the Holocene and during the Holocene Thermal Maximum (ca. 10 000–6000 BP), tree biomass tracked the melting of the Laurentide Ice Sheet with high values (>50 tonnes·ha –1 and a total of 12 Pg). These values, in the range of modern forest ecosystems biomass, indicate that trees were probably able to survive in a periglacial environment and to colonize the region without any discernible lag by tracking the ice retreat. High biomass at the beginning of the Holocene was likely favoured by higher than present insolation, CO 2 levels higher than during the Last Glacial Maximum, and temperature and precipitation close to present-day levels. Past tree biomass reconstruction thus brings novel insights about the drivers of postglacial tree biomass and the overall biogeography of the region since the deglaciation. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing Canada Canadian Journal of Forest Research 46 4 485 498 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Forest ecosystems in eastern Canada are particularly sensitive to climate change and may shift from carbon sinks to carbon sources in the coming decades. Understanding how forest biomass responded to past climate change is thus of crucial interest, but past biomass reconstruction still represents a challenge. Here we used transfer functions based on modern pollen assemblages and remotely sensed biomass estimation to reconstruct and quantify, for the last 14 000 years, tree biomass dynamics for the six main tree genera of the boreal and mixedwood forests (Abies, Acer, Betula, Picea, Pinus, Populus). We compared the mean genera and total biomass with climatic (summer temperatures and annual precipitation), physical (CO 2 , insolation, ice area), and disturbance (burned biomass) variables to identify the potential drivers influencing the long-term trends in tree biomass. For most genera, tree biomass was related to summer temperature, insolation, and CO 2 levels; Picea was the exception and its biomass also correlated with annual precipitation. At the onset of the Holocene and during the Holocene Thermal Maximum (ca. 10 000–6000 BP), tree biomass tracked the melting of the Laurentide Ice Sheet with high values (>50 tonnes·ha –1 and a total of 12 Pg). These values, in the range of modern forest ecosystems biomass, indicate that trees were probably able to survive in a periglacial environment and to colonize the region without any discernible lag by tracking the ice retreat. High biomass at the beginning of the Holocene was likely favoured by higher than present insolation, CO 2 levels higher than during the Last Glacial Maximum, and temperature and precipitation close to present-day levels. Past tree biomass reconstruction thus brings novel insights about the drivers of postglacial tree biomass and the overall biogeography of the region since the deglaciation. |
format |
Article in Journal/Newspaper |
author |
Blarquez, Olivier Aleman, Julie C. |
spellingShingle |
Blarquez, Olivier Aleman, Julie C. Tree biomass reconstruction shows no lag in postglacial afforestation of eastern Canada |
author_facet |
Blarquez, Olivier Aleman, Julie C. |
author_sort |
Blarquez, Olivier |
title |
Tree biomass reconstruction shows no lag in postglacial afforestation of eastern Canada |
title_short |
Tree biomass reconstruction shows no lag in postglacial afforestation of eastern Canada |
title_full |
Tree biomass reconstruction shows no lag in postglacial afforestation of eastern Canada |
title_fullStr |
Tree biomass reconstruction shows no lag in postglacial afforestation of eastern Canada |
title_full_unstemmed |
Tree biomass reconstruction shows no lag in postglacial afforestation of eastern Canada |
title_sort |
tree biomass reconstruction shows no lag in postglacial afforestation of eastern canada |
publisher |
Canadian Science Publishing |
publishDate |
2016 |
url |
http://dx.doi.org/10.1139/cjfr-2015-0201 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfr-2015-0201 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfr-2015-0201 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Forest Research volume 46, issue 4, page 485-498 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfr-2015-0201 |
container_title |
Canadian Journal of Forest Research |
container_volume |
46 |
container_issue |
4 |
container_start_page |
485 |
op_container_end_page |
498 |
_version_ |
1809915068521906176 |