Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska
In this study we determined the magnitude of plant mediated CH4 emission (flux) in two vegetation types of Carex ramenskii. The objectives of this paper were to quantify the proportion of CH4 emissions from plant mediated flux and the total flux (plant and soil). This information is needed in order...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2017
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ftumeauniv:oai:DiVA.org:umu-133407 2023-10-09T21:49:20+02:00 Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska Lynöe, Kaj 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133407 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133407 info:eu-repo/semantics/openAccess Arctic wetlands Greenhouse gases CH4 emission Plant mediated gas release Geese grazing Biological Sciences Biologiska vetenskaper Student thesis info:eu-repo/semantics/bachelorThesis text 2017 ftumeauniv 2023-09-22T13:42:57Z In this study we determined the magnitude of plant mediated CH4 emission (flux) in two vegetation types of Carex ramenskii. The objectives of this paper were to quantify the proportion of CH4 emissions from plant mediated flux and the total flux (plant and soil). This information is needed in order to understand how grazing affects plant mediated CH4 flux. In addition, we differentiated between two vegetation morphs, grazed and ungrazed, and determined the plant mediated CH4 flux for vegetation type. This study was conducted at a field site on the Tutakoke River (61 15’N, 165 30’W) which is located in the coastal region of the Yukon-Kuskokwim Delta. Three replicate plots of the two vegetation morphs of Carex ramenskii were established. Methane flux was measured with a total flux chamber (plant and soil) and a single leaf chamber using a Picarro Cavity Ring-Down Spectroscopy Analyzer (Model G2308, Picarro Inc., Santa Clara, California). Plant density for the two plant types was determined. Temperature measurements were taken and correlated with gas flux. This study found that total net CH4 emissions from Carex ssp. were the same in both vegetation types. This similarity could indicate that plant mediated flux through vegetation is not affected by grazing in the sense that grazing is neither facilitating nor inhibiting plant mediated CH4 flux. The magnitude of plant mediated flux was still greater in the ungrazed meadow type, indicating on both greater facilitation of CH4 flux, and below ground oxygen transport enabling higher rates of CH4 consumption. Bachelor Thesis Arctic Kuskokwim Alaska Yukon Umeå University: Publications (DiVA) Arctic Yukon |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Arctic wetlands Greenhouse gases CH4 emission Plant mediated gas release Geese grazing Biological Sciences Biologiska vetenskaper |
spellingShingle |
Arctic wetlands Greenhouse gases CH4 emission Plant mediated gas release Geese grazing Biological Sciences Biologiska vetenskaper Lynöe, Kaj Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska |
topic_facet |
Arctic wetlands Greenhouse gases CH4 emission Plant mediated gas release Geese grazing Biological Sciences Biologiska vetenskaper |
description |
In this study we determined the magnitude of plant mediated CH4 emission (flux) in two vegetation types of Carex ramenskii. The objectives of this paper were to quantify the proportion of CH4 emissions from plant mediated flux and the total flux (plant and soil). This information is needed in order to understand how grazing affects plant mediated CH4 flux. In addition, we differentiated between two vegetation morphs, grazed and ungrazed, and determined the plant mediated CH4 flux for vegetation type. This study was conducted at a field site on the Tutakoke River (61 15’N, 165 30’W) which is located in the coastal region of the Yukon-Kuskokwim Delta. Three replicate plots of the two vegetation morphs of Carex ramenskii were established. Methane flux was measured with a total flux chamber (plant and soil) and a single leaf chamber using a Picarro Cavity Ring-Down Spectroscopy Analyzer (Model G2308, Picarro Inc., Santa Clara, California). Plant density for the two plant types was determined. Temperature measurements were taken and correlated with gas flux. This study found that total net CH4 emissions from Carex ssp. were the same in both vegetation types. This similarity could indicate that plant mediated flux through vegetation is not affected by grazing in the sense that grazing is neither facilitating nor inhibiting plant mediated CH4 flux. The magnitude of plant mediated flux was still greater in the ungrazed meadow type, indicating on both greater facilitation of CH4 flux, and below ground oxygen transport enabling higher rates of CH4 consumption. |
format |
Bachelor Thesis |
author |
Lynöe, Kaj |
author_facet |
Lynöe, Kaj |
author_sort |
Lynöe, Kaj |
title |
Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska |
title_short |
Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska |
title_full |
Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska |
title_fullStr |
Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska |
title_full_unstemmed |
Methane flux from Carex ramenskii on coastal meadows and grazing lawns in western Alaska |
title_sort |
methane flux from carex ramenskii on coastal meadows and grazing lawns in western alaska |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133407 |
geographic |
Arctic Yukon |
geographic_facet |
Arctic Yukon |
genre |
Arctic Kuskokwim Alaska Yukon |
genre_facet |
Arctic Kuskokwim Alaska Yukon |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-133407 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1779312351947784192 |