Methane emission from a wetland plant: the role of CH4 oxidation in Eriophorum |
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Authors: | Frenzel Peter Rudolph Jutta |
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Affiliation: | (1) Max-Planck-Institut für terrestriche Mikrobiologie, Karl-von-Frisch-Str., D-35043 Marburg, Germany |
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Abstract: | The importance of plant-mediated CH4 transport was studied in a northern wetland. CH4 transport through Eriophorum, a dominant sedge, was found to be the major pathway for CH4 fluxes. Mean emission from Sphagnum lawns was low (34 g CH4 m-2 h-1) and significantly higher from tussocks of Eriophorum vaginatum (974 g CH4 m-2 h-1; U-test, p < 0.05). Mean flux from single tillers of Eriophorum angustifolium was 92 g CH4 h-1. In contrast to other ecosystems, no CH4 oxidation was associated with Eriophorum. Hence, the lack of oxidation is one reason for the high emission rates from these ecosystems. This finding is a caveat for models of CH4 emission and may also have consequences for carbon flow models of northern wetlands. |
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Keywords: | gas transport methane emission methane oxidation peatland |
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