Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica
Water tracks are zones of high soil moisture that route shallow groundwater down-slope, through the active layer and above the ice table. A water track in Taylor Valley, McMurdo Dry Valleys, was analysed for surface hydrogeological, geochemical, and biological characteristics in order to test the hy...
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Language: | English |
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2014
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Online Access: | https://doi.org/10.1017/S095410201300045X http://hdl.handle.net/1959.7/uws:28829 |
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ftunivwestsyd:oai:researchdirect.westernsydney.edu.au:uws_28829 2023-05-15T13:32:11+02:00 Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica Levy, Joseph S. Fountain, Andrew G. Gooseff, Michael N. Barrett, John E. Vantreese, Robert Welch, Kathy A. Lyons, William B. Nielsen, Uffe N. (R17023) Wall, Diana H. Hawkesbury Institute for the Environment (Host institution) 2014 print 10 https://doi.org/10.1017/S095410201300045X http://hdl.handle.net/1959.7/uws:28829 eng eng U.K., Cambridge University Press Antarctic Science--0954-1020 Vol. 26 Issue. 2 pp: 153-162 050399 - Soil Sciences not elsewhere classified 961499 - Soils not elsewhere classified ecosystems invertebrates Taylor Valley (Antarctica) groundwater journal article Text 2014 ftunivwestsyd https://doi.org/10.1017/S095410201300045X 2020-12-05T18:42:45Z Water tracks are zones of high soil moisture that route shallow groundwater down-slope, through the active layer and above the ice table. A water track in Taylor Valley, McMurdo Dry Valleys, was analysed for surface hydrogeological, geochemical, and biological characteristics in order to test the hypothesis that water tracks provide spatial structure to Antarctic soil ecosystems by changing the physical conditions in the soil environment within the water tracks from those outside the water tracks. The presence of the water track significantly affected the distribution of biotic and abiotic ecosystem parameters: increasing soil moisture, soil salinity, and soil organic matter within the water track relative to soils outside the water track, and reducing soil phosphate, soil pH, and the population of nematodes and other invertebrates in water track soils relative to off track soils. These results suggest that water tracks are distinct and extreme ecological zones in Taylor Valley that provide long-range (kilometre to multi- kilometre) structure to Antarctic hillslope ecosystems through physical control on soil moisture and solute content. Contrary to expectations, these high soil-moisture sites are not hotspots for faunal biological activity because high soil salinity makes them suitable habitats for only the most halo-tolerant organisms. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica McMurdo Dry Valleys University of Western Sydney (UWS): Research Direct Antarctic Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) Lake Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Antarctic Science 26 2 153 162 |
institution |
Open Polar |
collection |
University of Western Sydney (UWS): Research Direct |
op_collection_id |
ftunivwestsyd |
language |
English |
topic |
050399 - Soil Sciences not elsewhere classified 961499 - Soils not elsewhere classified ecosystems invertebrates Taylor Valley (Antarctica) groundwater |
spellingShingle |
050399 - Soil Sciences not elsewhere classified 961499 - Soils not elsewhere classified ecosystems invertebrates Taylor Valley (Antarctica) groundwater Levy, Joseph S. Fountain, Andrew G. Gooseff, Michael N. Barrett, John E. Vantreese, Robert Welch, Kathy A. Lyons, William B. Nielsen, Uffe N. (R17023) Wall, Diana H. Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica |
topic_facet |
050399 - Soil Sciences not elsewhere classified 961499 - Soils not elsewhere classified ecosystems invertebrates Taylor Valley (Antarctica) groundwater |
description |
Water tracks are zones of high soil moisture that route shallow groundwater down-slope, through the active layer and above the ice table. A water track in Taylor Valley, McMurdo Dry Valleys, was analysed for surface hydrogeological, geochemical, and biological characteristics in order to test the hypothesis that water tracks provide spatial structure to Antarctic soil ecosystems by changing the physical conditions in the soil environment within the water tracks from those outside the water tracks. The presence of the water track significantly affected the distribution of biotic and abiotic ecosystem parameters: increasing soil moisture, soil salinity, and soil organic matter within the water track relative to soils outside the water track, and reducing soil phosphate, soil pH, and the population of nematodes and other invertebrates in water track soils relative to off track soils. These results suggest that water tracks are distinct and extreme ecological zones in Taylor Valley that provide long-range (kilometre to multi- kilometre) structure to Antarctic hillslope ecosystems through physical control on soil moisture and solute content. Contrary to expectations, these high soil-moisture sites are not hotspots for faunal biological activity because high soil salinity makes them suitable habitats for only the most halo-tolerant organisms. |
author2 |
Hawkesbury Institute for the Environment (Host institution) |
format |
Article in Journal/Newspaper |
author |
Levy, Joseph S. Fountain, Andrew G. Gooseff, Michael N. Barrett, John E. Vantreese, Robert Welch, Kathy A. Lyons, William B. Nielsen, Uffe N. (R17023) Wall, Diana H. |
author_facet |
Levy, Joseph S. Fountain, Andrew G. Gooseff, Michael N. Barrett, John E. Vantreese, Robert Welch, Kathy A. Lyons, William B. Nielsen, Uffe N. (R17023) Wall, Diana H. |
author_sort |
Levy, Joseph S. |
title |
Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica |
title_short |
Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica |
title_full |
Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica |
title_fullStr |
Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica |
title_full_unstemmed |
Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica |
title_sort |
water track modification of soil ecosystems in the lake hoare basin, taylor valley, antarctica |
publisher |
U.K., Cambridge University Press |
publishDate |
2014 |
url |
https://doi.org/10.1017/S095410201300045X http://hdl.handle.net/1959.7/uws:28829 |
long_lat |
ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
Antarctic Hoare Lake Hoare McMurdo Dry Valleys Taylor Valley |
geographic_facet |
Antarctic Hoare Lake Hoare McMurdo Dry Valleys Taylor Valley |
genre |
Antarc* Antarctic Antarctic Science Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica McMurdo Dry Valleys |
op_relation |
Antarctic Science--0954-1020 Vol. 26 Issue. 2 pp: 153-162 |
op_doi |
https://doi.org/10.1017/S095410201300045X |
container_title |
Antarctic Science |
container_volume |
26 |
container_issue |
2 |
container_start_page |
153 |
op_container_end_page |
162 |
_version_ |
1766024873683976192 |