Sensitivity of Arctic Permafrost Carbon in Mackenzie River Basin Peatlands: An Incubation Experiment to Observe the Priming Effect
MA University of Hawaii at Manoa 2015 Includes bibliographical references (leaves 40–48). The goal of this laboratory incubation experiment was to better understand the potential for priming effects to occur and alter carbon balance in carbon-rich peatland permafrost soils within the Mackenzie River...
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ftunivhawaiimano:oai:scholarspace.manoa.hawaii.edu:10125/51144 2023-05-15T15:00:51+02:00 Sensitivity of Arctic Permafrost Carbon in Mackenzie River Basin Peatlands: An Incubation Experiment to Observe the Priming Effect Hedgpeth, Alexandra L. Beilman, Dave Geography and Environment 2015-12 iii, 48 leaves application/pdf http://hdl.handle.net/10125/51144 eng eng [Honolulu] : [University of Hawaii at Manoa], [December 2015] Theses for the degree of Master of Arts (University of Hawaii at Manoa). Geography. http://hdl.handle.net/10125/51144 All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. permafrost carbon peatland peat arctic priming effect Thesis Text 2015 ftunivhawaiimano 2022-07-17T13:04:20Z MA University of Hawaii at Manoa 2015 Includes bibliographical references (leaves 40–48). The goal of this laboratory incubation experiment was to better understand the potential for priming effects to occur and alter carbon balance in carbon-rich peatland permafrost soils within the Mackenzie River Basin, Canada along a north-south transect. Geographical effects on soil processes can potentially be seen in the specific responses and vulnerabilities of these soils across latitude. Temperature, precipitation, and permafrost SOM quality are some examples of ecosystem characteristics that are in part determined by location; all influence microbial activity driving carbon cycling processes (Treat et al., 2014). Assuming that characteristics of organic matter affect the magnitude of the priming effect, expected differences in carbon quality between the northern and southern sites may exhibit different potential for the priming effect. Hartley et al. (2010) found that low nutrient availability, especially nitrogen, produces the most pronounced priming effect when labile compounds were added to the soil. Regions with poor nutrient availability will exhibit more of a priming effect due to microbial mining for necessary nutrients to support new microbial growth (Hartley et al., 2010; Kuzyakov et al., 2000; Kuzyakov, 2010). Assuming the microbial communities are similar in structure between the permafrost peatland sites used in this experiment, microbial decomposition will not be controlled by community composition, but instead by limiting factors specific to the soil ecosystem of each site. The geographic factors directing priming potentials of permafrost soils in the Mackenzie River Basin will consist of site specific variations caused by latitudinal effects. Thesis Arctic Mackenzie river permafrost ScholarSpace at University of Hawaii at Manoa Arctic Canada Mackenzie River |
institution |
Open Polar |
collection |
ScholarSpace at University of Hawaii at Manoa |
op_collection_id |
ftunivhawaiimano |
language |
English |
topic |
permafrost carbon peatland peat arctic priming effect |
spellingShingle |
permafrost carbon peatland peat arctic priming effect Hedgpeth, Alexandra L. Sensitivity of Arctic Permafrost Carbon in Mackenzie River Basin Peatlands: An Incubation Experiment to Observe the Priming Effect |
topic_facet |
permafrost carbon peatland peat arctic priming effect |
description |
MA University of Hawaii at Manoa 2015 Includes bibliographical references (leaves 40–48). The goal of this laboratory incubation experiment was to better understand the potential for priming effects to occur and alter carbon balance in carbon-rich peatland permafrost soils within the Mackenzie River Basin, Canada along a north-south transect. Geographical effects on soil processes can potentially be seen in the specific responses and vulnerabilities of these soils across latitude. Temperature, precipitation, and permafrost SOM quality are some examples of ecosystem characteristics that are in part determined by location; all influence microbial activity driving carbon cycling processes (Treat et al., 2014). Assuming that characteristics of organic matter affect the magnitude of the priming effect, expected differences in carbon quality between the northern and southern sites may exhibit different potential for the priming effect. Hartley et al. (2010) found that low nutrient availability, especially nitrogen, produces the most pronounced priming effect when labile compounds were added to the soil. Regions with poor nutrient availability will exhibit more of a priming effect due to microbial mining for necessary nutrients to support new microbial growth (Hartley et al., 2010; Kuzyakov et al., 2000; Kuzyakov, 2010). Assuming the microbial communities are similar in structure between the permafrost peatland sites used in this experiment, microbial decomposition will not be controlled by community composition, but instead by limiting factors specific to the soil ecosystem of each site. The geographic factors directing priming potentials of permafrost soils in the Mackenzie River Basin will consist of site specific variations caused by latitudinal effects. |
author2 |
Beilman, Dave Geography and Environment |
format |
Thesis |
author |
Hedgpeth, Alexandra L. |
author_facet |
Hedgpeth, Alexandra L. |
author_sort |
Hedgpeth, Alexandra L. |
title |
Sensitivity of Arctic Permafrost Carbon in Mackenzie River Basin Peatlands: An Incubation Experiment to Observe the Priming Effect |
title_short |
Sensitivity of Arctic Permafrost Carbon in Mackenzie River Basin Peatlands: An Incubation Experiment to Observe the Priming Effect |
title_full |
Sensitivity of Arctic Permafrost Carbon in Mackenzie River Basin Peatlands: An Incubation Experiment to Observe the Priming Effect |
title_fullStr |
Sensitivity of Arctic Permafrost Carbon in Mackenzie River Basin Peatlands: An Incubation Experiment to Observe the Priming Effect |
title_full_unstemmed |
Sensitivity of Arctic Permafrost Carbon in Mackenzie River Basin Peatlands: An Incubation Experiment to Observe the Priming Effect |
title_sort |
sensitivity of arctic permafrost carbon in mackenzie river basin peatlands: an incubation experiment to observe the priming effect |
publisher |
[Honolulu] : [University of Hawaii at Manoa], [December 2015] |
publishDate |
2015 |
url |
http://hdl.handle.net/10125/51144 |
geographic |
Arctic Canada Mackenzie River |
geographic_facet |
Arctic Canada Mackenzie River |
genre |
Arctic Mackenzie river permafrost |
genre_facet |
Arctic Mackenzie river permafrost |
op_relation |
Theses for the degree of Master of Arts (University of Hawaii at Manoa). Geography. http://hdl.handle.net/10125/51144 |
op_rights |
All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. |
_version_ |
1766332904147779584 |