Long-term effects of post-fire forest structure on understory vegetation in larch forests of the Siberian Arctic

Climate warming is increasing fire severity in boreal forests and can alter forest structure and carbon (C) dynamics in Cajander larch (Larix cajanderi) forests of Siberia, which occur over C and ice-rich yedoma permafrost. Altered forest structure may impact understory vegetation through changing c...

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Bibliographic Details
Main Author: Pena III, Homero
Other Authors: Heather D. Alexander, Brent R. Frey, Michael M. Loranty
Format: Text
Language:English
Published: MSSTATE 2017
Subjects:
Mississippi State University
Arctic
Ice
permafrost
Siberia
Online Access:http://sun.library.msstate.edu/ETD-db/theses/available/etd-10242017-091218/
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record_format openpolar
spelling ftmississippista:oai:library.msstate.edu:etd-10242017-091218 2023-05-15T15:04:44+02:00 Long-term effects of post-fire forest structure on understory vegetation in larch forests of the Siberian Arctic Pena III, Homero Heather D. Alexander Brent R. Frey Michael M. Loranty 2017-12-11 application/pdf http://sun.library.msstate.edu/ETD-db/theses/available/etd-10242017-091218/ en eng MSSTATE unrestricted I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, Dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Mississippi State University Libraries or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, Dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, Dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, Dissertation, or project report. http://sun.library.msstate.edu/ETD-db/theses/available/etd-10242017-091218/ Mississippi State University text 2017 ftmississippista 2019-07-19T16:48:33Z Climate warming is increasing fire severity in boreal forests and can alter forest structure and carbon (C) dynamics in Cajander larch (Larix cajanderi) forests of Siberia, which occur over C and ice-rich yedoma permafrost. Altered forest structure may impact understory vegetation through changing canopy cover, permafrost thaw depth, and soil temperatures. The primary objective of this study was to assess the long-term impacts of fire-driven changes in tree density on understory composition, diversity, and C pools and the underlying soil organic layer (SOL). Shrubs dominated low density stands, likely from reduced canopy cover and thaw depth, while mosses dominated high density stands. Consequently, understory C pools decreased from 415.46 to 158.87 g C m -2 . Total SOL C pools remained unchanged as tree density increased. These findings suggest that fire-driven changes in tree density may alter understory composition and C pools, which could impact nutrient/water cycling and permafrost stability. Text Arctic Ice permafrost Siberia Mississippi State University: ETD Collection Arctic
institution Open Polar
collection Mississippi State University: ETD Collection
op_collection_id ftmississippista
language English
topic Mississippi State University
spellingShingle Mississippi State University
Pena III, Homero
Long-term effects of post-fire forest structure on understory vegetation in larch forests of the Siberian Arctic
topic_facet Mississippi State University
description Climate warming is increasing fire severity in boreal forests and can alter forest structure and carbon (C) dynamics in Cajander larch (Larix cajanderi) forests of Siberia, which occur over C and ice-rich yedoma permafrost. Altered forest structure may impact understory vegetation through changing canopy cover, permafrost thaw depth, and soil temperatures. The primary objective of this study was to assess the long-term impacts of fire-driven changes in tree density on understory composition, diversity, and C pools and the underlying soil organic layer (SOL). Shrubs dominated low density stands, likely from reduced canopy cover and thaw depth, while mosses dominated high density stands. Consequently, understory C pools decreased from 415.46 to 158.87 g C m -2 . Total SOL C pools remained unchanged as tree density increased. These findings suggest that fire-driven changes in tree density may alter understory composition and C pools, which could impact nutrient/water cycling and permafrost stability.
author2 Heather D. Alexander
Brent R. Frey
Michael M. Loranty
format Text
author Pena III, Homero
author_facet Pena III, Homero
author_sort Pena III, Homero
title Long-term effects of post-fire forest structure on understory vegetation in larch forests of the Siberian Arctic
title_short Long-term effects of post-fire forest structure on understory vegetation in larch forests of the Siberian Arctic
title_full Long-term effects of post-fire forest structure on understory vegetation in larch forests of the Siberian Arctic
title_fullStr Long-term effects of post-fire forest structure on understory vegetation in larch forests of the Siberian Arctic
title_full_unstemmed Long-term effects of post-fire forest structure on understory vegetation in larch forests of the Siberian Arctic
title_sort long-term effects of post-fire forest structure on understory vegetation in larch forests of the siberian arctic
publisher MSSTATE
publishDate 2017
url http://sun.library.msstate.edu/ETD-db/theses/available/etd-10242017-091218/
geographic Arctic
geographic_facet Arctic
genre Arctic
Ice
permafrost
Siberia
genre_facet Arctic
Ice
permafrost
Siberia
op_source http://sun.library.msstate.edu/ETD-db/theses/available/etd-10242017-091218/
op_rights unrestricted
I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, Dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Mississippi State University Libraries or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, Dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, Dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, Dissertation, or project report.
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