Distribution and abiotic influences on hypolithic microbial communities in an Antarctic Dry Valley
The Miers Valley within the McMurdo Dry Valleys of Antarctica supports abundant quartz and marble substrates for hypolithons—microbial colonists on the underside of these translucent rocks. Three physically distinct hypolithic community types have been identified: cyanobacteria dominated (Type I), f...
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/68539 2023-12-17T10:21:57+01:00 Distribution and abiotic influences on hypolithic microbial communities in an Antarctic Dry Valley Cowan, D. Pointing, S. Stevens, M. Cary, C. Stomeo, F. Tuffin, I. 2011 application/pdf http://hdl.handle.net/2440/68539 https://doi.org/10.1007/s00300-010-0872-2 en eng Springer-Verlag Polar Biology, 2011; 34(2):307-311 0722-4060 1432-2056 http://hdl.handle.net/2440/68539 doi:10.1007/s00300-010-0872-2 Stevens, M. [0000-0003-1505-1639] © The Author(s) 2010. This article is published with open access at Springerlink.com http://dx.doi.org/10.1007/s00300-010-0872-2 Miers valley Antarctica cryptic microbial communities hypolithons microniches Journal article 2011 ftunivadelaidedl https://doi.org/10.1007/s00300-010-0872-2 2023-11-20T23:36:27Z The Miers Valley within the McMurdo Dry Valleys of Antarctica supports abundant quartz and marble substrates for hypolithons—microbial colonists on the underside of these translucent rocks. Three physically distinct hypolithic community types have been identified: cyanobacteria dominated (Type I), fungus dominated (Type II) or moss dominated (Type III). The distribution of the three types was mapped across much of the ~75 km2 area of the upper Miers Valley and correlated this with the measurements of selected micro-environmental variables. Type I hypolithons were most common and occurred at all altitudes up to 824 m, whilst Type II and Type III hypolithons were less abundant and restricted to lower altitudes on the valley floor (<415 m and <257 m, respectively). Whilst all colonized quartz effectively filtered incident UVB irradiance, transmittance levels for UVA and PAR varied markedly and were significant in determining hypolith type. Notably, the Type I hypolithons occurred under rocks with a significantly lower transmittance of photosynthetically active radiation than Type II and III hypolithons. Altitude and aspect were also significant factors determining hypolith type, and a role for altitude-related abiotic variables in determining the distribution of Type I, II and III hypolithons is proposed. Don A. Cowan, Stephen B. Pointing, Mark I. Stevens, S. Craig Cary, Francesca Stomeo and I. Marla Tuffin Article in Journal/Newspaper Antarc* Antarctic Antarctica McMurdo Dry Valleys Polar Biology The University of Adelaide: Digital Library Antarctic McMurdo Dry Valleys Miers ENVELOPE(163.850,163.850,-78.100,-78.100) Miers Valley ENVELOPE(164.200,164.200,-78.100,-78.100) Polar Biology 34 2 307 311 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Miers valley Antarctica cryptic microbial communities hypolithons microniches |
spellingShingle |
Miers valley Antarctica cryptic microbial communities hypolithons microniches Cowan, D. Pointing, S. Stevens, M. Cary, C. Stomeo, F. Tuffin, I. Distribution and abiotic influences on hypolithic microbial communities in an Antarctic Dry Valley |
topic_facet |
Miers valley Antarctica cryptic microbial communities hypolithons microniches |
description |
The Miers Valley within the McMurdo Dry Valleys of Antarctica supports abundant quartz and marble substrates for hypolithons—microbial colonists on the underside of these translucent rocks. Three physically distinct hypolithic community types have been identified: cyanobacteria dominated (Type I), fungus dominated (Type II) or moss dominated (Type III). The distribution of the three types was mapped across much of the ~75 km2 area of the upper Miers Valley and correlated this with the measurements of selected micro-environmental variables. Type I hypolithons were most common and occurred at all altitudes up to 824 m, whilst Type II and Type III hypolithons were less abundant and restricted to lower altitudes on the valley floor (<415 m and <257 m, respectively). Whilst all colonized quartz effectively filtered incident UVB irradiance, transmittance levels for UVA and PAR varied markedly and were significant in determining hypolith type. Notably, the Type I hypolithons occurred under rocks with a significantly lower transmittance of photosynthetically active radiation than Type II and III hypolithons. Altitude and aspect were also significant factors determining hypolith type, and a role for altitude-related abiotic variables in determining the distribution of Type I, II and III hypolithons is proposed. Don A. Cowan, Stephen B. Pointing, Mark I. Stevens, S. Craig Cary, Francesca Stomeo and I. Marla Tuffin |
format |
Article in Journal/Newspaper |
author |
Cowan, D. Pointing, S. Stevens, M. Cary, C. Stomeo, F. Tuffin, I. |
author_facet |
Cowan, D. Pointing, S. Stevens, M. Cary, C. Stomeo, F. Tuffin, I. |
author_sort |
Cowan, D. |
title |
Distribution and abiotic influences on hypolithic microbial communities in an Antarctic Dry Valley |
title_short |
Distribution and abiotic influences on hypolithic microbial communities in an Antarctic Dry Valley |
title_full |
Distribution and abiotic influences on hypolithic microbial communities in an Antarctic Dry Valley |
title_fullStr |
Distribution and abiotic influences on hypolithic microbial communities in an Antarctic Dry Valley |
title_full_unstemmed |
Distribution and abiotic influences on hypolithic microbial communities in an Antarctic Dry Valley |
title_sort |
distribution and abiotic influences on hypolithic microbial communities in an antarctic dry valley |
publisher |
Springer-Verlag |
publishDate |
2011 |
url |
http://hdl.handle.net/2440/68539 https://doi.org/10.1007/s00300-010-0872-2 |
long_lat |
ENVELOPE(163.850,163.850,-78.100,-78.100) ENVELOPE(164.200,164.200,-78.100,-78.100) |
geographic |
Antarctic McMurdo Dry Valleys Miers Miers Valley |
geographic_facet |
Antarctic McMurdo Dry Valleys Miers Miers Valley |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys Polar Biology |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys Polar Biology |
op_source |
http://dx.doi.org/10.1007/s00300-010-0872-2 |
op_relation |
Polar Biology, 2011; 34(2):307-311 0722-4060 1432-2056 http://hdl.handle.net/2440/68539 doi:10.1007/s00300-010-0872-2 Stevens, M. [0000-0003-1505-1639] |
op_rights |
© The Author(s) 2010. This article is published with open access at Springerlink.com |
op_doi |
https://doi.org/10.1007/s00300-010-0872-2 |
container_title |
Polar Biology |
container_volume |
34 |
container_issue |
2 |
container_start_page |
307 |
op_container_end_page |
311 |
_version_ |
1785541143948165120 |