Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica
Global climate change scenarios predict not only higher temperatures, but also increased climatic variability. In cold regions, these changes may bring about a shift in the frequency of soil freeze-thaw cycles (FTCs), which represent a significant physiological challenge, especially for small, poiki...
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ftunivgent:oai:archive.ugent.be:8556323 2023-06-11T04:05:04+02:00 Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica Knox, Matthew A Wall, Diana H Virginia, Ross A Vandegehuchte, Martijn L. San Gil, Inigo Adams, Byron J 2016 https://biblio.ugent.be/publication/8556323 http://hdl.handle.net/1854/LU-8556323 https://doi.org/10.1007/s00300-015-1809-6 eng eng https://biblio.ugent.be/publication/8556323 http://hdl.handle.net/1854/LU-8556323 http://dx.doi.org/10.1007/s00300-015-1809-6 POLAR BIOLOGY ISSN: 0722-4060 ISSN: 1432-2056 Biology and Life Sciences Earth and Environmental Sciences MCMURDO DRY VALLEYS POLAR DESERT ECOSYSTEM PANAGROLAIMUS-DAVIDI MICROBIAL COMMUNITIES HABITAT SUITABILITY MODELING ANALYSIS VICTORIA LAND LIFE-CYCLE SURVIVAL ANHYDROBIOSIS Dry Valleys Nematodes Climate change Extreme environment Demographics Soil fauna Long term research journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftunivgent https://doi.org/10.1007/s00300-015-1809-6 2023-05-10T22:27:33Z Global climate change scenarios predict not only higher temperatures, but also increased climatic variability. In cold regions, these changes may bring about a shift in the frequency of soil freeze-thaw cycles (FTCs), which represent a significant physiological challenge, especially for small, poikilothermic animals with limited mobility. To assess the impact of FTCs on cold-adapted soil biota, we evaluated freeze-thaw dynamics (i.e., 0 A degrees C crossings) and demographics of the dominant nematode Scottnema lindsayae (proportion of adults, population size) over 20 years in soils at two locations in Taylor Valley, Antarctica. Based on hourly soil temperature data, we demonstrate that FTCs are a frequent feature in Taylor Valley, but with high inter-annual and spatial variability. Valley topography and soil moisture were found to impact FTC frequency, suggesting that basins within Taylor Valley have different susceptibilities to environmental variability. Increased FTC frequency in 1999-2001 coincided with a shift in S. lindsayae populations, with fewer juveniles reaching maturity. In the years following decreased adult proportions, overall S. lindsayae numbers were reduced, implying a strong negative effect of FTCs on in situ recruitment. Our results suggest that increased FTC frequency in the Dry Valleys slows S. lindsayae development, reducing reproductive success, and may take years to impact population size, which demonstrates the importance of long-term research to accurately predict the consequences of climate change on soil biota and biogeochemical cycling in the cold regions. Article in Journal/Newspaper Antarc* Antarctica McMurdo Dry Valleys Polar Biology polar desert Victoria Land Ghent University Academic Bibliography Victoria Land McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Polar Biology 39 4 583 592 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences Earth and Environmental Sciences MCMURDO DRY VALLEYS POLAR DESERT ECOSYSTEM PANAGROLAIMUS-DAVIDI MICROBIAL COMMUNITIES HABITAT SUITABILITY MODELING ANALYSIS VICTORIA LAND LIFE-CYCLE SURVIVAL ANHYDROBIOSIS Dry Valleys Nematodes Climate change Extreme environment Demographics Soil fauna Long term research |
spellingShingle |
Biology and Life Sciences Earth and Environmental Sciences MCMURDO DRY VALLEYS POLAR DESERT ECOSYSTEM PANAGROLAIMUS-DAVIDI MICROBIAL COMMUNITIES HABITAT SUITABILITY MODELING ANALYSIS VICTORIA LAND LIFE-CYCLE SURVIVAL ANHYDROBIOSIS Dry Valleys Nematodes Climate change Extreme environment Demographics Soil fauna Long term research Knox, Matthew A Wall, Diana H Virginia, Ross A Vandegehuchte, Martijn L. San Gil, Inigo Adams, Byron J Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica |
topic_facet |
Biology and Life Sciences Earth and Environmental Sciences MCMURDO DRY VALLEYS POLAR DESERT ECOSYSTEM PANAGROLAIMUS-DAVIDI MICROBIAL COMMUNITIES HABITAT SUITABILITY MODELING ANALYSIS VICTORIA LAND LIFE-CYCLE SURVIVAL ANHYDROBIOSIS Dry Valleys Nematodes Climate change Extreme environment Demographics Soil fauna Long term research |
description |
Global climate change scenarios predict not only higher temperatures, but also increased climatic variability. In cold regions, these changes may bring about a shift in the frequency of soil freeze-thaw cycles (FTCs), which represent a significant physiological challenge, especially for small, poikilothermic animals with limited mobility. To assess the impact of FTCs on cold-adapted soil biota, we evaluated freeze-thaw dynamics (i.e., 0 A degrees C crossings) and demographics of the dominant nematode Scottnema lindsayae (proportion of adults, population size) over 20 years in soils at two locations in Taylor Valley, Antarctica. Based on hourly soil temperature data, we demonstrate that FTCs are a frequent feature in Taylor Valley, but with high inter-annual and spatial variability. Valley topography and soil moisture were found to impact FTC frequency, suggesting that basins within Taylor Valley have different susceptibilities to environmental variability. Increased FTC frequency in 1999-2001 coincided with a shift in S. lindsayae populations, with fewer juveniles reaching maturity. In the years following decreased adult proportions, overall S. lindsayae numbers were reduced, implying a strong negative effect of FTCs on in situ recruitment. Our results suggest that increased FTC frequency in the Dry Valleys slows S. lindsayae development, reducing reproductive success, and may take years to impact population size, which demonstrates the importance of long-term research to accurately predict the consequences of climate change on soil biota and biogeochemical cycling in the cold regions. |
format |
Article in Journal/Newspaper |
author |
Knox, Matthew A Wall, Diana H Virginia, Ross A Vandegehuchte, Martijn L. San Gil, Inigo Adams, Byron J |
author_facet |
Knox, Matthew A Wall, Diana H Virginia, Ross A Vandegehuchte, Martijn L. San Gil, Inigo Adams, Byron J |
author_sort |
Knox, Matthew A |
title |
Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica |
title_short |
Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica |
title_full |
Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica |
title_fullStr |
Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica |
title_full_unstemmed |
Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica |
title_sort |
impact of diurnal freeze-thaw cycles on the soil nematode scottnema lindsayae in taylor valley, antarctica |
publishDate |
2016 |
url |
https://biblio.ugent.be/publication/8556323 http://hdl.handle.net/1854/LU-8556323 https://doi.org/10.1007/s00300-015-1809-6 |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
Victoria Land McMurdo Dry Valleys Taylor Valley |
geographic_facet |
Victoria Land McMurdo Dry Valleys Taylor Valley |
genre |
Antarc* Antarctica McMurdo Dry Valleys Polar Biology polar desert Victoria Land |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys Polar Biology polar desert Victoria Land |
op_source |
POLAR BIOLOGY ISSN: 0722-4060 ISSN: 1432-2056 |
op_relation |
https://biblio.ugent.be/publication/8556323 http://hdl.handle.net/1854/LU-8556323 http://dx.doi.org/10.1007/s00300-015-1809-6 |
op_doi |
https://doi.org/10.1007/s00300-015-1809-6 |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
4 |
container_start_page |
583 |
op_container_end_page |
592 |
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1768371384113692672 |