The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica
Received: 27 May 2014 / Revised: 19 August 2014 / Accepted: 21 August 2014 / Published online: 31 August 2014 Hypolithic communities represent important reservoirs of microbial life in hyper-arid deserts. A number of studies on the diversity and ecology of these communities from different geographic...
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ftcsic:oai:digital.csic.es:10261/121734 2024-02-11T09:56:05+01:00 The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica Ríos, Asunción de los Cary, Craig Cowan, Don Ministerio de Educación (España) 2014-12 http://hdl.handle.net/10261/121734 https://doi.org/10.1007/s00300-014-1564-0 en eng Springer Postprint http://dx.doi.org/10.1007/s00300-014-1564-0 Sí Polar Biology 37(12): 1823-1833 (2014) 0722-4060 http://hdl.handle.net/10261/121734 doi:10.1007/s00300-014-1564-0 1432-2056 open Antarctica Biofilms Cyanobacteria EPS Hypoliths Moss artículo http://purl.org/coar/resource_type/c_6501 2014 ftcsic https://doi.org/10.1007/s00300-014-1564-0 2024-01-16T10:10:23Z Received: 27 May 2014 / Revised: 19 August 2014 / Accepted: 21 August 2014 / Published online: 31 August 2014 Hypolithic communities represent important reservoirs of microbial life in hyper-arid deserts. A number of studies on the diversity and ecology of these communities from different geographic areas have been reported in the past decade, but the spatial distribution of the different components of these communities is still not understood. Moss- and cyanobacteria-dominated hypolithic community morphotypes from Miers Valley (McMurdo Dry Valleys, East Antarctica) were analyzed by electron microscopy in order to characterize the microscale spatial structure. The two communities showed a high degree of internal organization, but differing according to the biological composition. In moss-dominated hypoliths, the moss plantlets are intermixed with mineral fragments of soil origin. However, in cyanobacteria-dominated hypoliths, a layered spatial organization was structured by filamentous cyanobacteria and associated extracellular polymeric components. While moss cells were lacking in cyanobacteria-dominated communities, biofilms formed by cyanobacteria and heterotrophic bacteria were observed in both community morphotypes. The water-holding capacity of both live and dead moss cells and the associated organic matrix, together with the protective properties of the extracellular polymeric substances, could facilitate the survival and activity of these communities. Similar structural strategies can favor the survival of microbial communities in different extreme environments. The microscopy study was funded by the Spanish Education Ministry grant CTM2012- 38222-C02-02. Peer reviewed Article in Journal/Newspaper Antarc* Antarctica East Antarctica McMurdo Dry Valleys Polar Biology Digital.CSIC (Spanish National Research Council) East Antarctica 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 37 12 1823 1833 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Antarctica Biofilms Cyanobacteria EPS Hypoliths Moss |
spellingShingle |
Antarctica Biofilms Cyanobacteria EPS Hypoliths Moss Ríos, Asunción de los Cary, Craig Cowan, Don The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica |
topic_facet |
Antarctica Biofilms Cyanobacteria EPS Hypoliths Moss |
description |
Received: 27 May 2014 / Revised: 19 August 2014 / Accepted: 21 August 2014 / Published online: 31 August 2014 Hypolithic communities represent important reservoirs of microbial life in hyper-arid deserts. A number of studies on the diversity and ecology of these communities from different geographic areas have been reported in the past decade, but the spatial distribution of the different components of these communities is still not understood. Moss- and cyanobacteria-dominated hypolithic community morphotypes from Miers Valley (McMurdo Dry Valleys, East Antarctica) were analyzed by electron microscopy in order to characterize the microscale spatial structure. The two communities showed a high degree of internal organization, but differing according to the biological composition. In moss-dominated hypoliths, the moss plantlets are intermixed with mineral fragments of soil origin. However, in cyanobacteria-dominated hypoliths, a layered spatial organization was structured by filamentous cyanobacteria and associated extracellular polymeric components. While moss cells were lacking in cyanobacteria-dominated communities, biofilms formed by cyanobacteria and heterotrophic bacteria were observed in both community morphotypes. The water-holding capacity of both live and dead moss cells and the associated organic matrix, together with the protective properties of the extracellular polymeric substances, could facilitate the survival and activity of these communities. Similar structural strategies can favor the survival of microbial communities in different extreme environments. The microscopy study was funded by the Spanish Education Ministry grant CTM2012- 38222-C02-02. Peer reviewed |
author2 |
Ministerio de Educación (España) |
format |
Article in Journal/Newspaper |
author |
Ríos, Asunción de los Cary, Craig Cowan, Don |
author_facet |
Ríos, Asunción de los Cary, Craig Cowan, Don |
author_sort |
Ríos, Asunción de los |
title |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica |
title_short |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica |
title_full |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica |
title_fullStr |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica |
title_full_unstemmed |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica |
title_sort |
spatial structures of hypolithic communities in the dry valleys of east antarctica |
publisher |
Springer |
publishDate |
2014 |
url |
http://hdl.handle.net/10261/121734 https://doi.org/10.1007/s00300-014-1564-0 |
long_lat |
ENVELOPE(163.850,163.850,-78.100,-78.100) ENVELOPE(164.200,164.200,-78.100,-78.100) |
geographic |
East Antarctica McMurdo Dry Valleys Miers Miers Valley |
geographic_facet |
East Antarctica McMurdo Dry Valleys Miers Miers Valley |
genre |
Antarc* Antarctica East Antarctica McMurdo Dry Valleys Polar Biology |
genre_facet |
Antarc* Antarctica East Antarctica McMurdo Dry Valleys Polar Biology |
op_relation |
Postprint http://dx.doi.org/10.1007/s00300-014-1564-0 Sí Polar Biology 37(12): 1823-1833 (2014) 0722-4060 http://hdl.handle.net/10261/121734 doi:10.1007/s00300-014-1564-0 1432-2056 |
op_rights |
open |
op_doi |
https://doi.org/10.1007/s00300-014-1564-0 |
container_title |
Polar Biology |
container_volume |
37 |
container_issue |
12 |
container_start_page |
1823 |
op_container_end_page |
1833 |
_version_ |
1790600538641924096 |