Stable Isotope Studies of Methane Production in Northern Wetlands
Northern peatlands are complex wetland ecosystems that are characterized as bogs, fens, or tundra. Since these systems are flooded for much of the growing season, organic matter often decomposes anaerobically. Methanogenesis is the dominant means of anaerobic metabolism occurring in these wetlands a...
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Tallahassee, Florida: Florida State University
2004
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ftfloridasu:oai:diginole.lib.fsu.edu:fsu_182590 2024-06-09T07:50:02+00:00 Stable Isotope Studies of Methane Production in Northern Wetlands Fields, Dana L. (authoraut) Chanton, Jeffrey P. (professor directing thesis) Kostka, Joel (committee member) Landing, William M. (committee member) Department of Earth, Ocean and Atmospheric Sciences (degree granting department) Florida State University (degree granting institution) 2004 1 online resource computer https://diginole.lib.fsu.edu/islandora/object/fsu%3A182590/datastream/TN/view/Stable%20Isotope%20Studies%20of%20Methane%20Production%20in%20Northern%20Wetlands.jpg English eng eng Tallahassee, Florida: Florida State University fsu:182590 (IID) FSU_migr_etd-4466 (URL) http://purl.flvc.org/fsu/fd/FSU_migr_etd-4466 https://diginole.lib.fsu.edu/islandora/object/fsu%3A182590/datastream/TN/view/Stable%20Isotope%20Studies%20of%20Methane%20Production%20in%20Northern%20Wetlands.jpg This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. Oceanography Text 2004 ftfloridasu 2024-05-10T08:08:12Z Northern peatlands are complex wetland ecosystems that are characterized as bogs, fens, or tundra. Since these systems are flooded for much of the growing season, organic matter often decomposes anaerobically. Methanogenesis is the dominant means of anaerobic metabolism occurring in these wetlands and can occur via two separate pathways. Acetoclastic methanogenesis involves the formation and subsequent degradation of acetate to form carbon dioxide and methane. Methane can also be produced by the reduction of carbon dioxide by hydrogen gas. This research uses natural abundance isotopes to discern the proportion of methane produced by each of these mechanisms in peatlands along a north-south transect across Alaska. The focus of this research was to investigate pathway shifts in methane production across latitudinal and vegetation gradients in order to discover if acetoclastice methanogenesis becomes less important at higher latitudes. Our study concluded that factors other than latitude (vegetation type and/or pH) have greater impact on methane production mechanism than does latitude. Another objective of this research was to determine if the methanogenic pathway influences the stable deuterium (äD) isotope ratios of the methane produced. This study provided further evidence that methane production mechanism influences the äD of methane causing an antipathetic relationship between the fractionation factors of D and 13C (áD and áC). Submitted Note: A Thesis submitted to the Department of Oceanography in partial fulfillment of the requirements for the degree of >Master of Science. Degree Awarded: Summer Semester, 2004. Date of Defense: September 19, 2003. Keywords: Methane Production, Natural Abundance Isotopes, Methane, Stable Isotopes, Alpha, Fractionation Factors Bibliography Note: Includes bibliographical references. Advisory Committee: Jeffrey P. Chanton, Professor Directing Thesis; Joel Kostka, Committee Member; William M. Landing, Committee Member. Text Tundra Alaska Florida State University: DigiNole Commons Kostka ENVELOPE(164.817,164.817,-70.700,-70.700) |
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Open Polar |
collection |
Florida State University: DigiNole Commons |
op_collection_id |
ftfloridasu |
language |
English |
topic |
Oceanography |
spellingShingle |
Oceanography Stable Isotope Studies of Methane Production in Northern Wetlands |
topic_facet |
Oceanography |
description |
Northern peatlands are complex wetland ecosystems that are characterized as bogs, fens, or tundra. Since these systems are flooded for much of the growing season, organic matter often decomposes anaerobically. Methanogenesis is the dominant means of anaerobic metabolism occurring in these wetlands and can occur via two separate pathways. Acetoclastic methanogenesis involves the formation and subsequent degradation of acetate to form carbon dioxide and methane. Methane can also be produced by the reduction of carbon dioxide by hydrogen gas. This research uses natural abundance isotopes to discern the proportion of methane produced by each of these mechanisms in peatlands along a north-south transect across Alaska. The focus of this research was to investigate pathway shifts in methane production across latitudinal and vegetation gradients in order to discover if acetoclastice methanogenesis becomes less important at higher latitudes. Our study concluded that factors other than latitude (vegetation type and/or pH) have greater impact on methane production mechanism than does latitude. Another objective of this research was to determine if the methanogenic pathway influences the stable deuterium (äD) isotope ratios of the methane produced. This study provided further evidence that methane production mechanism influences the äD of methane causing an antipathetic relationship between the fractionation factors of D and 13C (áD and áC). Submitted Note: A Thesis submitted to the Department of Oceanography in partial fulfillment of the requirements for the degree of >Master of Science. Degree Awarded: Summer Semester, 2004. Date of Defense: September 19, 2003. Keywords: Methane Production, Natural Abundance Isotopes, Methane, Stable Isotopes, Alpha, Fractionation Factors Bibliography Note: Includes bibliographical references. Advisory Committee: Jeffrey P. Chanton, Professor Directing Thesis; Joel Kostka, Committee Member; William M. Landing, Committee Member. |
author2 |
Fields, Dana L. (authoraut) Chanton, Jeffrey P. (professor directing thesis) Kostka, Joel (committee member) Landing, William M. (committee member) Department of Earth, Ocean and Atmospheric Sciences (degree granting department) Florida State University (degree granting institution) |
format |
Text |
title |
Stable Isotope Studies of Methane Production in Northern Wetlands |
title_short |
Stable Isotope Studies of Methane Production in Northern Wetlands |
title_full |
Stable Isotope Studies of Methane Production in Northern Wetlands |
title_fullStr |
Stable Isotope Studies of Methane Production in Northern Wetlands |
title_full_unstemmed |
Stable Isotope Studies of Methane Production in Northern Wetlands |
title_sort |
stable isotope studies of methane production in northern wetlands |
publisher |
Tallahassee, Florida: Florida State University |
publishDate |
2004 |
url |
https://diginole.lib.fsu.edu/islandora/object/fsu%3A182590/datastream/TN/view/Stable%20Isotope%20Studies%20of%20Methane%20Production%20in%20Northern%20Wetlands.jpg |
long_lat |
ENVELOPE(164.817,164.817,-70.700,-70.700) |
geographic |
Kostka |
geographic_facet |
Kostka |
genre |
Tundra Alaska |
genre_facet |
Tundra Alaska |
op_relation |
fsu:182590 (IID) FSU_migr_etd-4466 (URL) http://purl.flvc.org/fsu/fd/FSU_migr_etd-4466 https://diginole.lib.fsu.edu/islandora/object/fsu%3A182590/datastream/TN/view/Stable%20Isotope%20Studies%20of%20Methane%20Production%20in%20Northern%20Wetlands.jpg |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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1801383016893775872 |