Persistent effects of a discrete warming event on a polar desert ecosystem
A discrete warming event (December 21, 2001-January 12, 2002) in the McMurdo Dry Valleys, Antarctica, enhanced glacier melt, stream flow, and melting of permafrost. Effects of this warming included a rapid rise in lake levels and widespread increases in soil water availability resulting from melting...
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ftlouisianastuir:oai:digitalcommons.lsu.edu:geo_pubs-1644 2023-06-11T04:04:31+02:00 Persistent effects of a discrete warming event on a polar desert ecosystem Barrett, J. E. Virginia, R. A. Wall, D. H. Doran, P. T. Fountain, A. G. Welch, K. A. Lyons, W. B. 2008-09-30T07:00:00Z https://digitalcommons.lsu.edu/geo_pubs/645 https://doi.org/10.1111/j.1365-2486.2008.01641.x unknown LSU Digital Commons https://digitalcommons.lsu.edu/geo_pubs/645 doi:10.1111/j.1365-2486.2008.01641.x Faculty Publications Antarctic dry valleys Climate change Extreme climate event Nematodes text 2008 ftlouisianastuir https://doi.org/10.1111/j.1365-2486.2008.01641.x 2023-05-28T18:16:59Z A discrete warming event (December 21, 2001-January 12, 2002) in the McMurdo Dry Valleys, Antarctica, enhanced glacier melt, stream flow, and melting of permafrost. Effects of this warming included a rapid rise in lake levels and widespread increases in soil water availability resulting from melting of subsurface ice. These increases in liquid water offset hydrologic responses to a cooling trend experienced over the previous decade and altered ecosystem properties in both aquatic and terrestrial ecosystems. Here, we present hydrological and meteorological data from the McMurdo Dry Valleys Long Term Ecological Research project to examine the influence of a discrete climate event (warming of >2°C) on terrestrial environments and soil biotic communities. Increases in soil moisture following this event stimulated populations of a subordinate soil invertebrate species (Eudorylaimus antarcticus, Nematoda). The pulse of melt-water had significant influences on Taylor Valley ecosystems that persisted for several years, and illustrates that the importance of discrete climate events, long recognized in hot deserts, are also significant drivers of soil and aquatic ecosystems in polar deserts. Thus, predictions of Antarctic ecosystem responses to climate change which focus on linear temperature trends may miss the potentially significant influence of infrequent climate events on hydrology and linked ecological processes. © 2008 The Authors Journal compilation © 2008 Blackwell Publishing. Text Antarc* Antarctic Antarctica antarcticus Eudorylaimus antarcticus Ice McMurdo Dry Valleys permafrost polar desert LSU Digital Commons (Louisiana State University) Antarctic McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Global Change Biology 14 10 2249 2261 |
institution |
Open Polar |
collection |
LSU Digital Commons (Louisiana State University) |
op_collection_id |
ftlouisianastuir |
language |
unknown |
topic |
Antarctic dry valleys Climate change Extreme climate event Nematodes |
spellingShingle |
Antarctic dry valleys Climate change Extreme climate event Nematodes Barrett, J. E. Virginia, R. A. Wall, D. H. Doran, P. T. Fountain, A. G. Welch, K. A. Lyons, W. B. Persistent effects of a discrete warming event on a polar desert ecosystem |
topic_facet |
Antarctic dry valleys Climate change Extreme climate event Nematodes |
description |
A discrete warming event (December 21, 2001-January 12, 2002) in the McMurdo Dry Valleys, Antarctica, enhanced glacier melt, stream flow, and melting of permafrost. Effects of this warming included a rapid rise in lake levels and widespread increases in soil water availability resulting from melting of subsurface ice. These increases in liquid water offset hydrologic responses to a cooling trend experienced over the previous decade and altered ecosystem properties in both aquatic and terrestrial ecosystems. Here, we present hydrological and meteorological data from the McMurdo Dry Valleys Long Term Ecological Research project to examine the influence of a discrete climate event (warming of >2°C) on terrestrial environments and soil biotic communities. Increases in soil moisture following this event stimulated populations of a subordinate soil invertebrate species (Eudorylaimus antarcticus, Nematoda). The pulse of melt-water had significant influences on Taylor Valley ecosystems that persisted for several years, and illustrates that the importance of discrete climate events, long recognized in hot deserts, are also significant drivers of soil and aquatic ecosystems in polar deserts. Thus, predictions of Antarctic ecosystem responses to climate change which focus on linear temperature trends may miss the potentially significant influence of infrequent climate events on hydrology and linked ecological processes. © 2008 The Authors Journal compilation © 2008 Blackwell Publishing. |
format |
Text |
author |
Barrett, J. E. Virginia, R. A. Wall, D. H. Doran, P. T. Fountain, A. G. Welch, K. A. Lyons, W. B. |
author_facet |
Barrett, J. E. Virginia, R. A. Wall, D. H. Doran, P. T. Fountain, A. G. Welch, K. A. Lyons, W. B. |
author_sort |
Barrett, J. E. |
title |
Persistent effects of a discrete warming event on a polar desert ecosystem |
title_short |
Persistent effects of a discrete warming event on a polar desert ecosystem |
title_full |
Persistent effects of a discrete warming event on a polar desert ecosystem |
title_fullStr |
Persistent effects of a discrete warming event on a polar desert ecosystem |
title_full_unstemmed |
Persistent effects of a discrete warming event on a polar desert ecosystem |
title_sort |
persistent effects of a discrete warming event on a polar desert ecosystem |
publisher |
LSU Digital Commons |
publishDate |
2008 |
url |
https://digitalcommons.lsu.edu/geo_pubs/645 https://doi.org/10.1111/j.1365-2486.2008.01641.x |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
Antarctic McMurdo Dry Valleys Taylor Valley |
geographic_facet |
Antarctic McMurdo Dry Valleys Taylor Valley |
genre |
Antarc* Antarctic Antarctica antarcticus Eudorylaimus antarcticus Ice McMurdo Dry Valleys permafrost polar desert |
genre_facet |
Antarc* Antarctic Antarctica antarcticus Eudorylaimus antarcticus Ice McMurdo Dry Valleys permafrost polar desert |
op_source |
Faculty Publications |
op_relation |
https://digitalcommons.lsu.edu/geo_pubs/645 doi:10.1111/j.1365-2486.2008.01641.x |
op_doi |
https://doi.org/10.1111/j.1365-2486.2008.01641.x |
container_title |
Global Change Biology |
container_volume |
14 |
container_issue |
10 |
container_start_page |
2249 |
op_container_end_page |
2261 |
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1768388428419825664 |