Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake ...
The carbon isotopic composition of methane emitted by the Alaskan emergent aquatic plants Arctophila fulva, a tundra mid-lake macrophyte, and Carex rostrata, a tundra lake margin macrophyte, was -58.6±0.5 (n=2) and -66.6±2.5 (n=6) ‰ respectively. The methane emitted by these species was found to be...
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ftdatacite:10.17615/83jr-mw22 2024-03-31T07:51:23+00:00 Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake ... Kelley, C.A. Martens, C.S. Showers, W.J. Chanton, J.P. Crill, P.M. 1992 https://dx.doi.org/10.17615/83jr-mw22 https://cdr.lib.unc.edu/concern/articles/pr76fc98n en eng Wiley-Blackwell In Copyright http://rightsstatements.org/vocab/InC/1.0/ Text article-journal Article ScholarlyArticle 1992 ftdatacite https://doi.org/10.17615/83jr-mw22 2024-03-04T11:45:02Z The carbon isotopic composition of methane emitted by the Alaskan emergent aquatic plants Arctophila fulva, a tundra mid-lake macrophyte, and Carex rostrata, a tundra lake margin macrophyte, was -58.6±0.5 (n=2) and -66.6±2.5 (n=6) ‰ respectively. The methane emitted by these species was found to be depleted in 13C by 12‰ and 18‰, relative to methane withdrawn from plant stems 1 to 2cm below the waterline. As the macrophyte-mediated methane flux represented approximately 97% of the flux from these sites, these results suggest the more rapid transport of 12CH4 relative to 13CH4 through plants to the atmosphere. Plant stem methane concentrations ranged from 0.2 to 4.0% (x̄, 1.4; standard deviation (sd), 0.9; n=28) in Arctophila, with an isotopic composition of -46.1±4.3‰) (n=8). Carex stem methane concentrations were lower, ranging from 150 to 1200 ppm (x̄, 500; standard deviation, 360; n=8), with an isotopic composition of -48.3±1.4‰ (n=3). ... Text Arctophila fulva Tundra DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
description |
The carbon isotopic composition of methane emitted by the Alaskan emergent aquatic plants Arctophila fulva, a tundra mid-lake macrophyte, and Carex rostrata, a tundra lake margin macrophyte, was -58.6±0.5 (n=2) and -66.6±2.5 (n=6) ‰ respectively. The methane emitted by these species was found to be depleted in 13C by 12‰ and 18‰, relative to methane withdrawn from plant stems 1 to 2cm below the waterline. As the macrophyte-mediated methane flux represented approximately 97% of the flux from these sites, these results suggest the more rapid transport of 12CH4 relative to 13CH4 through plants to the atmosphere. Plant stem methane concentrations ranged from 0.2 to 4.0% (x̄, 1.4; standard deviation (sd), 0.9; n=28) in Arctophila, with an isotopic composition of -46.1±4.3‰) (n=8). Carex stem methane concentrations were lower, ranging from 150 to 1200 ppm (x̄, 500; standard deviation, 360; n=8), with an isotopic composition of -48.3±1.4‰ (n=3). ... |
format |
Text |
author |
Kelley, C.A. Martens, C.S. Showers, W.J. Chanton, J.P. Crill, P.M. |
spellingShingle |
Kelley, C.A. Martens, C.S. Showers, W.J. Chanton, J.P. Crill, P.M. Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake ... |
author_facet |
Kelley, C.A. Martens, C.S. Showers, W.J. Chanton, J.P. Crill, P.M. |
author_sort |
Kelley, C.A. |
title |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake ... |
title_short |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake ... |
title_full |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake ... |
title_fullStr |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake ... |
title_full_unstemmed |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake ... |
title_sort |
methane transport mechanisms and isotopic fractionation in emergent macrophytes of an alaskan tundra lake ... |
publisher |
Wiley-Blackwell |
publishDate |
1992 |
url |
https://dx.doi.org/10.17615/83jr-mw22 https://cdr.lib.unc.edu/concern/articles/pr76fc98n |
genre |
Arctophila fulva Tundra |
genre_facet |
Arctophila fulva Tundra |
op_rights |
In Copyright http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/83jr-mw22 |
_version_ |
1795029966703820800 |