Millennial stocks and fluxes of large woody debris in lakes of the North American taiga.
1.Large woody debris (LWD) is an important cross boundary subsidy that enhances the productivity of lake ecosystems and the stability of aquatic food webs. LWD may also be an important carbon sink because LWD pieces are preserved for centuries in the littoral zone of lakes and rivers. However, a lon...
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Online Access: | https://espace.inrs.ca/id/eprint/3585/ https://doi.org/10.1111/1365-2745.12198 |
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ftinrsquebec:oai:espace.inrs.ca:3585 2023-05-15T18:30:44+02:00 Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. Gennaretti, Fabio Arseneault, Dominique Bégin, Yves De Deyn, Gerlinde 2014 https://espace.inrs.ca/id/eprint/3585/ https://doi.org/10.1111/1365-2745.12198 unknown Gennaretti, Fabio, Arseneault, Dominique, Bégin, Yves et De Deyn, Gerlinde (2014). Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. Journal of Ecology , vol. 102 , nº 2. p. 367-380. DOI:10.1111/1365-2745.12198 <https://doi.org/10.1111/1365-2745.12198>. doi:10.1111/1365-2745.12198 carbon storage coarse woody habitat cross-boundary subsidy dendrochronology fire ecology land-water interaction littoral zone palaeoecology and land-use history Picea mariana Quebec boreal forest Article Évalué par les pairs 2014 ftinrsquebec https://doi.org/10.1111/1365-2745.12198 2023-02-10T11:42:31Z 1.Large woody debris (LWD) is an important cross boundary subsidy that enhances the productivity of lake ecosystems and the stability of aquatic food webs. LWD may also be an important carbon sink because LWD pieces are preserved for centuries in the littoral zone of lakes and rivers. However, a long term analysis of LWD stocks and fluxes in lakes, coupled with the reconstruction of past disturbances at the site level, has never been attempted. 2.LWD was sampled in five lakes of the Quebec taiga. Actual LWD stocks were described and residence time of the LWD pieces was established using tree-ring and radiocarbon dating. LWD losses by decomposition and burial and other factors influencing LWD residence time were investigated using linear regressions. 3.Impacts of wildfires on LWD fluxes during the last 1400 years were reconstructed separately for the 5 lakes using piecewise regression models. Fire years at each site were identified from the recruitment dates of charred LWD pieces. 4.LWD volume ranged between 0.92 and 1.57 m3 per 100 m of shoreline and, extrapolating these results to the landscape scale, it was concluded that LWD littoral carbon pools represent a minimal portion of boreal carbon storage. 5.LWD residence time in boreal lakes was confirmed to be very long. Tree-ring dates of 1571 LWD pieces, mainly black spruce (Picea mariana (Mill.) BSP.), spanned the last 1400 years, while LWD specimens of older floating chronologies were preserved from decomposition for up to five millennia. The most influential variables explaining variation in LWD residence time were the degree of burial and the distance from the shore. 6.LWD recruitment rates averaged 5.8 pieces per century per 100 m of shoreline. Fourteen wildfires were the primary cause for changes in the rates of tree establishment in the riparian forests and of LWD recruitment in the lakes. 7.Synthesis: Interactions between terrestrial and aquatic ecosystems in northern boreal regions are strongly influenced by wildfires whose effects can last for ... Article in Journal/Newspaper taiga Institut national de la recherche scientifique, Québec: Espace INRS Journal of Ecology 102 2 367 380 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
unknown |
topic |
carbon storage coarse woody habitat cross-boundary subsidy dendrochronology fire ecology land-water interaction littoral zone palaeoecology and land-use history Picea mariana Quebec boreal forest |
spellingShingle |
carbon storage coarse woody habitat cross-boundary subsidy dendrochronology fire ecology land-water interaction littoral zone palaeoecology and land-use history Picea mariana Quebec boreal forest Gennaretti, Fabio Arseneault, Dominique Bégin, Yves De Deyn, Gerlinde Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. |
topic_facet |
carbon storage coarse woody habitat cross-boundary subsidy dendrochronology fire ecology land-water interaction littoral zone palaeoecology and land-use history Picea mariana Quebec boreal forest |
description |
1.Large woody debris (LWD) is an important cross boundary subsidy that enhances the productivity of lake ecosystems and the stability of aquatic food webs. LWD may also be an important carbon sink because LWD pieces are preserved for centuries in the littoral zone of lakes and rivers. However, a long term analysis of LWD stocks and fluxes in lakes, coupled with the reconstruction of past disturbances at the site level, has never been attempted. 2.LWD was sampled in five lakes of the Quebec taiga. Actual LWD stocks were described and residence time of the LWD pieces was established using tree-ring and radiocarbon dating. LWD losses by decomposition and burial and other factors influencing LWD residence time were investigated using linear regressions. 3.Impacts of wildfires on LWD fluxes during the last 1400 years were reconstructed separately for the 5 lakes using piecewise regression models. Fire years at each site were identified from the recruitment dates of charred LWD pieces. 4.LWD volume ranged between 0.92 and 1.57 m3 per 100 m of shoreline and, extrapolating these results to the landscape scale, it was concluded that LWD littoral carbon pools represent a minimal portion of boreal carbon storage. 5.LWD residence time in boreal lakes was confirmed to be very long. Tree-ring dates of 1571 LWD pieces, mainly black spruce (Picea mariana (Mill.) BSP.), spanned the last 1400 years, while LWD specimens of older floating chronologies were preserved from decomposition for up to five millennia. The most influential variables explaining variation in LWD residence time were the degree of burial and the distance from the shore. 6.LWD recruitment rates averaged 5.8 pieces per century per 100 m of shoreline. Fourteen wildfires were the primary cause for changes in the rates of tree establishment in the riparian forests and of LWD recruitment in the lakes. 7.Synthesis: Interactions between terrestrial and aquatic ecosystems in northern boreal regions are strongly influenced by wildfires whose effects can last for ... |
format |
Article in Journal/Newspaper |
author |
Gennaretti, Fabio Arseneault, Dominique Bégin, Yves De Deyn, Gerlinde |
author_facet |
Gennaretti, Fabio Arseneault, Dominique Bégin, Yves De Deyn, Gerlinde |
author_sort |
Gennaretti, Fabio |
title |
Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. |
title_short |
Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. |
title_full |
Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. |
title_fullStr |
Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. |
title_full_unstemmed |
Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. |
title_sort |
millennial stocks and fluxes of large woody debris in lakes of the north american taiga. |
publishDate |
2014 |
url |
https://espace.inrs.ca/id/eprint/3585/ https://doi.org/10.1111/1365-2745.12198 |
genre |
taiga |
genre_facet |
taiga |
op_relation |
Gennaretti, Fabio, Arseneault, Dominique, Bégin, Yves et De Deyn, Gerlinde (2014). Millennial stocks and fluxes of large woody debris in lakes of the North American taiga. Journal of Ecology , vol. 102 , nº 2. p. 367-380. DOI:10.1111/1365-2745.12198 <https://doi.org/10.1111/1365-2745.12198>. doi:10.1111/1365-2745.12198 |
op_doi |
https://doi.org/10.1111/1365-2745.12198 |
container_title |
Journal of Ecology |
container_volume |
102 |
container_issue |
2 |
container_start_page |
367 |
op_container_end_page |
380 |
_version_ |
1766214306094907392 |