Climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost Siberian watershed
Fluxes of dissolved organic carbon (DOC) in forested watersheds underlain by permafrost are likely to vary with changes in climatic regime that increase soil moisture and temperature. We examined the effects of temporal and spatial variations in soil temperature and moisture on DOC fluxes from the f...
Published in: | Canadian Journal of Forest Research |
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crcansciencepubl:10.1139/x05-150 2024-04-28T08:23:48+00:00 Climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost Siberian watershed Prokushkin, A S Kajimoto, T Prokushkin, S G McDowell, W H Abaimov, A P Matsuura, Y 2005 http://dx.doi.org/10.1139/x05-150 http://www.nrcresearchpress.com/doi/pdf/10.1139/x05-150 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 35, issue 9, page 2130-2140 ISSN 0045-5067 1208-6037 Ecology Forestry Global and Planetary Change journal-article 2005 crcansciencepubl https://doi.org/10.1139/x05-150 2024-04-02T06:55:55Z Fluxes of dissolved organic carbon (DOC) in forested watersheds underlain by permafrost are likely to vary with changes in climatic regime that increase soil moisture and temperature. We examined the effects of temporal and spatial variations in soil temperature and moisture on DOC fluxes from the forest floor of contrasting north- and south-facing slopes in central Siberia. DOC fluxes increased throughout the growing season (JuneSeptember) on both slopes in 2002 and 2003. The most favorable combination of moisture content and temperature (deepest active soil layer) occurred in September, and we believe this was the primary driver of increased DOC concentrations and flux in autumn. Total DOC flux for JuneSeptember was 12.617.6 g C·m 2 on the south-facing slope and 4.68.9 g C·m 2 on the north-facing slope. DOC concentrations in forest floor leachates increased with increasing temperature on the north-facing slope, but were almost unaffected by temperature on the south-facing slope. Our results suggest that water input in midseason from melting of ice or precipitation events is the primary factor limiting DOC production. Significant positive correlations between amounts of precipitation and DOC flux were found on both slopes. Dilution of DOC concentrations by high precipitation volumes was observed only for the forest floor leachates collected from the north-facing slope. Our results suggest that global warming will result in increased DOC production in forest floors of permafrost regions, and that precipitation patterns will play an important role in determining the magnitude of these changes in DOC flux as well as its interannual variability. However, the longer-term response of soils and DOC flux to a warming climate will be driven by changes in vegetation and microbial communities as well as by the direct results of temperature and moisture conditions. Article in Journal/Newspaper Ice permafrost Siberia Canadian Science Publishing Canadian Journal of Forest Research 35 9 2130 2140 |
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Canadian Science Publishing |
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English |
topic |
Ecology Forestry Global and Planetary Change |
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Ecology Forestry Global and Planetary Change Prokushkin, A S Kajimoto, T Prokushkin, S G McDowell, W H Abaimov, A P Matsuura, Y Climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost Siberian watershed |
topic_facet |
Ecology Forestry Global and Planetary Change |
description |
Fluxes of dissolved organic carbon (DOC) in forested watersheds underlain by permafrost are likely to vary with changes in climatic regime that increase soil moisture and temperature. We examined the effects of temporal and spatial variations in soil temperature and moisture on DOC fluxes from the forest floor of contrasting north- and south-facing slopes in central Siberia. DOC fluxes increased throughout the growing season (JuneSeptember) on both slopes in 2002 and 2003. The most favorable combination of moisture content and temperature (deepest active soil layer) occurred in September, and we believe this was the primary driver of increased DOC concentrations and flux in autumn. Total DOC flux for JuneSeptember was 12.617.6 g C·m 2 on the south-facing slope and 4.68.9 g C·m 2 on the north-facing slope. DOC concentrations in forest floor leachates increased with increasing temperature on the north-facing slope, but were almost unaffected by temperature on the south-facing slope. Our results suggest that water input in midseason from melting of ice or precipitation events is the primary factor limiting DOC production. Significant positive correlations between amounts of precipitation and DOC flux were found on both slopes. Dilution of DOC concentrations by high precipitation volumes was observed only for the forest floor leachates collected from the north-facing slope. Our results suggest that global warming will result in increased DOC production in forest floors of permafrost regions, and that precipitation patterns will play an important role in determining the magnitude of these changes in DOC flux as well as its interannual variability. However, the longer-term response of soils and DOC flux to a warming climate will be driven by changes in vegetation and microbial communities as well as by the direct results of temperature and moisture conditions. |
format |
Article in Journal/Newspaper |
author |
Prokushkin, A S Kajimoto, T Prokushkin, S G McDowell, W H Abaimov, A P Matsuura, Y |
author_facet |
Prokushkin, A S Kajimoto, T Prokushkin, S G McDowell, W H Abaimov, A P Matsuura, Y |
author_sort |
Prokushkin, A S |
title |
Climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost Siberian watershed |
title_short |
Climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost Siberian watershed |
title_full |
Climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost Siberian watershed |
title_fullStr |
Climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost Siberian watershed |
title_full_unstemmed |
Climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost Siberian watershed |
title_sort |
climatic factors influencing fluxes of dissolved organic carbon from the forest floor in a continuous-permafrost siberian watershed |
publisher |
Canadian Science Publishing |
publishDate |
2005 |
url |
http://dx.doi.org/10.1139/x05-150 http://www.nrcresearchpress.com/doi/pdf/10.1139/x05-150 |
genre |
Ice permafrost Siberia |
genre_facet |
Ice permafrost Siberia |
op_source |
Canadian Journal of Forest Research volume 35, issue 9, page 2130-2140 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/x05-150 |
container_title |
Canadian Journal of Forest Research |
container_volume |
35 |
container_issue |
9 |
container_start_page |
2130 |
op_container_end_page |
2140 |
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1797584488142733312 |