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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1111/nph.19404
|2 doi
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|a pubmed24n1320.xml
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|a (NLM)37984803
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|a DE-627
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|e rakwb
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|a eng
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|a Jeffrey, Luke C
|e verfasserin
|4 aut
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|a Rapid bark-mediated tree stem methane transport occurs independently of the transpiration stream in Melaleuca quinquenervia
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 08.03.2024
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|a Date Revised 08.03.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2023 The Authors New Phytologist © 2023 New Phytologist Foundation.
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|a Tree stem methane emissions are important components of lowland forest methane budgets. The potential for species-specific behaviour among co-occurring lowland trees with contrasting bark characteristics has not been investigated. We compare bark-mediated methane transport in two common lowland species of contrasting bark characteristics (Melaleuca quinquenervia featuring spongy/layered bark with longitudinally continuous airspaces and Casuarina glauca featuring hard/dense common bark) through several manipulative experiments. First, the progressive cutting through M. quinquenervia bark layers caused exponential increases in methane fluxes (c. 3 orders of magnitude); however, sapwood-only fluxes were lower, suggesting that upward/axial methane transport occurs between bark layers. Second, concentrated methane pulse-injections into exposed M. quinquenervia bark, revealed rapid axial methane transport rates (1.42 mm s-1 ), which were further supported through laboratory-simulated experiments (1.41 mm s-1 ). Laboratory-simulated radial CH4 diffusion rates (through bark) were c. 20-times slower. Finally, girdling M. quinquenervia stems caused a near-instantaneous decrease in methane flux immediately above the cut. By contrast, girdling C. glauca displayed persistent, though diminished, methane fluxes. Overall, the experiments revealed evidence for rapid 'between-bark' methane transport independent from the transpiration stream in M. quinquenervia, which facilitates diffusive axial transport from the rhizosphere and/or sapwood sources. This contrasts with the slower, radial 'through-bark' diffusive-dominated gas transportation in C. glauca
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|a Journal Article
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|a CH4 emission
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|a CO2 diffusion
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|a Casuarina glauca
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|a greenhouse gases
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|a lowland forest
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|a paperbark
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|a wetland
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|a Methane
|2 NLM
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|a OP0UW79H66
|2 NLM
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|a Carbon Dioxide
|2 NLM
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|a 142M471B3J
|2 NLM
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|a Soil
|2 NLM
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|a Johnston, Scott G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tait, Douglas R
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Dittmann, Johannes
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Maher, Damien T
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 242(2024), 1 vom: 30. März, Seite 49-60
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:242
|g year:2024
|g number:1
|g day:30
|g month:03
|g pages:49-60
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|u http://dx.doi.org/10.1111/nph.19404
|3 Volltext
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