Nutrient limitation of microbial decomposition in Arctic tussock tundra soil
2013 Summer. Includes bibliographical references. Cold, wet conditions limit microbial activity in many parts of the Arctic tundra, resulting in slow decomposition of soil organic matter, low nitrogen (N) mineralization rates and the accumulation of massive amounts of soil organic carbon (SOC). Clim...
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ftmountainschol:oai:mountainscholar.org:10217/80331 2023-06-11T04:08:09+02:00 Nutrient limitation of microbial decomposition in Arctic tussock tundra soil Melle, Caroline Wallenstein, Matthew von Fischer, Joseph Stromberger, Mary Steltzer, Heidi 2007-01-03T05:57:02Z born digital masters theses application/pdf http://hdl.handle.net/10217/80331 English eng eng Colorado State University. Libraries 2000-2019 - CSU Theses and Dissertations Melle_colostate_0053N_11800.pdf ETDF2013500270ECOL http://hdl.handle.net/10217/80331 Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. Text 2007 ftmountainschol 2023-04-29T17:47:55Z 2013 Summer. Includes bibliographical references. Cold, wet conditions limit microbial activity in many parts of the Arctic tundra, resulting in slow decomposition of soil organic matter, low nitrogen (N) mineralization rates and the accumulation of massive amounts of soil organic carbon (SOC). Climate change is currently reducing these physical environmental constraints, allowing for Arctic SOC to become vulnerable to decomposition. However, historically low decomposition rates due to climatic inhibition have resulted in soils with extremely poor nutrient availability in the active soil layer for much of the year further inhibiting ecosystem productivity and limiting microbial decomposition. N limitation of both primary productivity and microbial activity, in addition to extremely low soil N availability throughout much of the active season, make many Arctic tundra ecosystems among the most N limited in the world. Changing climatic conditions can potentially allow for increased annual N mineralization resulting in greater soil N availability. Enduring increases in soil N availability would alter microbial driven biogeochemical cycles with cascading long-term effects on Arctic tundra ecosystems. Despite previous experimental findings of N limitation of microbial decomposition in Arctic tundra, seasonal variability in soil N availability in conjunction with the influences of other soil factors indicate that N may not be the primary control of microbial activity in these soils during the entirety of the Arctic active season. The tight coupling of biogeochemical cycles suggests that labile carbon (C) may be co-limiting for portions of the active season when there is greater soil N available. Furthermore, most observations of N stimulation of microbial activities have originated from relatively few research sites due to the inaccessibility of much of the Arctic, but N limitation of decomposition may be site dependent and vary across small geographic areas. Questions of inter-annual and intersite variability of ... Text Arctic Climate change Tundra Mountain Scholar (Digital Collections of Colorado and Wyoming) Arctic |
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Mountain Scholar (Digital Collections of Colorado and Wyoming) |
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ftmountainschol |
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English |
description |
2013 Summer. Includes bibliographical references. Cold, wet conditions limit microbial activity in many parts of the Arctic tundra, resulting in slow decomposition of soil organic matter, low nitrogen (N) mineralization rates and the accumulation of massive amounts of soil organic carbon (SOC). Climate change is currently reducing these physical environmental constraints, allowing for Arctic SOC to become vulnerable to decomposition. However, historically low decomposition rates due to climatic inhibition have resulted in soils with extremely poor nutrient availability in the active soil layer for much of the year further inhibiting ecosystem productivity and limiting microbial decomposition. N limitation of both primary productivity and microbial activity, in addition to extremely low soil N availability throughout much of the active season, make many Arctic tundra ecosystems among the most N limited in the world. Changing climatic conditions can potentially allow for increased annual N mineralization resulting in greater soil N availability. Enduring increases in soil N availability would alter microbial driven biogeochemical cycles with cascading long-term effects on Arctic tundra ecosystems. Despite previous experimental findings of N limitation of microbial decomposition in Arctic tundra, seasonal variability in soil N availability in conjunction with the influences of other soil factors indicate that N may not be the primary control of microbial activity in these soils during the entirety of the Arctic active season. The tight coupling of biogeochemical cycles suggests that labile carbon (C) may be co-limiting for portions of the active season when there is greater soil N available. Furthermore, most observations of N stimulation of microbial activities have originated from relatively few research sites due to the inaccessibility of much of the Arctic, but N limitation of decomposition may be site dependent and vary across small geographic areas. Questions of inter-annual and intersite variability of ... |
author2 |
Wallenstein, Matthew von Fischer, Joseph Stromberger, Mary Steltzer, Heidi |
format |
Text |
author |
Melle, Caroline |
spellingShingle |
Melle, Caroline Nutrient limitation of microbial decomposition in Arctic tussock tundra soil |
author_facet |
Melle, Caroline |
author_sort |
Melle, Caroline |
title |
Nutrient limitation of microbial decomposition in Arctic tussock tundra soil |
title_short |
Nutrient limitation of microbial decomposition in Arctic tussock tundra soil |
title_full |
Nutrient limitation of microbial decomposition in Arctic tussock tundra soil |
title_fullStr |
Nutrient limitation of microbial decomposition in Arctic tussock tundra soil |
title_full_unstemmed |
Nutrient limitation of microbial decomposition in Arctic tussock tundra soil |
title_sort |
nutrient limitation of microbial decomposition in arctic tussock tundra soil |
publisher |
Colorado State University. Libraries |
publishDate |
2007 |
url |
http://hdl.handle.net/10217/80331 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra |
genre_facet |
Arctic Climate change Tundra |
op_relation |
2000-2019 - CSU Theses and Dissertations Melle_colostate_0053N_11800.pdf ETDF2013500270ECOL http://hdl.handle.net/10217/80331 |
op_rights |
Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. |
_version_ |
1768381284979048448 |