Importance of Lateral Flux and Its Percolation Depth on Organic Carbon Export in Arctic Tundra Soil: Implications from a Soil Leaching Experiment
Temperature rise in the Arctic is causing deepening of active layers and resulting in the mobilization of deep permafrost dissolved organic matter (DOM). However, the mechanisms of DOM mobilization from Arctic soils, especially upper soil horizons which are drained most frequently through a year, ar...
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ftunisfloridatam:oai:digitalcommons.usf.edu:msc_facpub-2450 2023-05-15T14:38:17+02:00 Importance of Lateral Flux and Its Percolation Depth on Organic Carbon Export in Arctic Tundra Soil: Implications from a Soil Leaching Experiment Zhang, Xiaowen Hutchings, Jack A. Bianchi, Thomas S. Liu, Yina Arellano, Ana Schuur, Edward A. 2017-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/1438 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2450&context=msc_facpub unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1438 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2450&context=msc_facpub default Marine Science Faculty Publications Arctic soil leaching DOM FT-ICR-MS EEMs Life Sciences article 2017 ftunisfloridatam 2022-01-20T18:39:53Z Temperature rise in the Arctic is causing deepening of active layers and resulting in the mobilization of deep permafrost dissolved organic matter (DOM). However, the mechanisms of DOM mobilization from Arctic soils, especially upper soil horizons which are drained most frequently through a year, are poorly understood. Here we conducted a short-term leaching experiment on surface and deep organic active layer soils, from the Yukon River basin, to examine the effects of DOM transport on bulk and molecular characteristics. Our data showed a net release of DOM from surface soils equal to an average of 5% of soil carbon. Conversely, deep soils percolated with surface leachates retained up to 27% of bulk DOM while releasing fluorescent components (up to 107%), indicating selective release of aromatic components (e.g., lignin and tannin), while retaining nonchromophoric components, as supported by spectrofluorometric and ultrahigh-resolution mass spectroscopic techniques. Our findings highlight the importance of the lateral flux of DOM on ecosystem carbon balance as well as processing of DOM transport through organic active layer soils en route to rivers and streams. This work also suggests the potential role of leachate export as an important mechanism of C losses from Arctic soils, in comparison with the more traditional pathway from soil to atmosphere in a warming Arctic. Article in Journal/Newspaper Arctic permafrost Tundra Yukon river Yukon Digital Commons University of South Florida (USF) Arctic Yukon |
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Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
Arctic soil leaching DOM FT-ICR-MS EEMs Life Sciences |
spellingShingle |
Arctic soil leaching DOM FT-ICR-MS EEMs Life Sciences Zhang, Xiaowen Hutchings, Jack A. Bianchi, Thomas S. Liu, Yina Arellano, Ana Schuur, Edward A. Importance of Lateral Flux and Its Percolation Depth on Organic Carbon Export in Arctic Tundra Soil: Implications from a Soil Leaching Experiment |
topic_facet |
Arctic soil leaching DOM FT-ICR-MS EEMs Life Sciences |
description |
Temperature rise in the Arctic is causing deepening of active layers and resulting in the mobilization of deep permafrost dissolved organic matter (DOM). However, the mechanisms of DOM mobilization from Arctic soils, especially upper soil horizons which are drained most frequently through a year, are poorly understood. Here we conducted a short-term leaching experiment on surface and deep organic active layer soils, from the Yukon River basin, to examine the effects of DOM transport on bulk and molecular characteristics. Our data showed a net release of DOM from surface soils equal to an average of 5% of soil carbon. Conversely, deep soils percolated with surface leachates retained up to 27% of bulk DOM while releasing fluorescent components (up to 107%), indicating selective release of aromatic components (e.g., lignin and tannin), while retaining nonchromophoric components, as supported by spectrofluorometric and ultrahigh-resolution mass spectroscopic techniques. Our findings highlight the importance of the lateral flux of DOM on ecosystem carbon balance as well as processing of DOM transport through organic active layer soils en route to rivers and streams. This work also suggests the potential role of leachate export as an important mechanism of C losses from Arctic soils, in comparison with the more traditional pathway from soil to atmosphere in a warming Arctic. |
format |
Article in Journal/Newspaper |
author |
Zhang, Xiaowen Hutchings, Jack A. Bianchi, Thomas S. Liu, Yina Arellano, Ana Schuur, Edward A. |
author_facet |
Zhang, Xiaowen Hutchings, Jack A. Bianchi, Thomas S. Liu, Yina Arellano, Ana Schuur, Edward A. |
author_sort |
Zhang, Xiaowen |
title |
Importance of Lateral Flux and Its Percolation Depth on Organic Carbon Export in Arctic Tundra Soil: Implications from a Soil Leaching Experiment |
title_short |
Importance of Lateral Flux and Its Percolation Depth on Organic Carbon Export in Arctic Tundra Soil: Implications from a Soil Leaching Experiment |
title_full |
Importance of Lateral Flux and Its Percolation Depth on Organic Carbon Export in Arctic Tundra Soil: Implications from a Soil Leaching Experiment |
title_fullStr |
Importance of Lateral Flux and Its Percolation Depth on Organic Carbon Export in Arctic Tundra Soil: Implications from a Soil Leaching Experiment |
title_full_unstemmed |
Importance of Lateral Flux and Its Percolation Depth on Organic Carbon Export in Arctic Tundra Soil: Implications from a Soil Leaching Experiment |
title_sort |
importance of lateral flux and its percolation depth on organic carbon export in arctic tundra soil: implications from a soil leaching experiment |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2017 |
url |
https://digitalcommons.usf.edu/msc_facpub/1438 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2450&context=msc_facpub |
geographic |
Arctic Yukon |
geographic_facet |
Arctic Yukon |
genre |
Arctic permafrost Tundra Yukon river Yukon |
genre_facet |
Arctic permafrost Tundra Yukon river Yukon |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/1438 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2450&context=msc_facpub |
op_rights |
default |
_version_ |
1766310392322064384 |