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
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/121734 |
| Acceso en línea: | http://hdl.handle.net/10261/121734 |
| Access Level: | acceso abierto |
| Palabra clave: | Antarctica Biofilms Cyanobacteria EPS Hypoliths Moss |
| id |
ES_53be4dbb4d24e46fd5d8a8a30e6206cb |
|---|---|
| oai_identifier_str |
oai:digital.csic.es:10261/121734 |
| network_acronym_str |
ES |
| network_name_str |
España |
| spelling |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica Ríos, Asunción de los Cary, Craig Cowan, Don Antarctica Biofilms Cyanobacteria EPS Hypoliths Moss 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 Springer Nature http://hdl.handle.net/10261/121734 |
| title |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica |
| spellingShingle |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica Ríos, Asunción de los Antarctica Biofilms Cyanobacteria EPS Hypoliths Moss |
| 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 |
The spatial structures of hypolithic communities in the Dry Valleys of East Antarctica |
| author |
Ríos, Asunción de los |
| author_facet |
Ríos, Asunción de los Cary, Craig Cowan, Don |
| author_role |
author |
| author2 |
Cary, Craig Cowan, Don |
| author2_role |
author author |
| topic |
Antarctica Biofilms Cyanobacteria EPS Hypoliths Moss |
| 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 |
| publishDate |
2014 |
| format |
article |
| status_str |
acceptedVersion |
| url |
http://hdl.handle.net/10261/121734 |
| eu_rights_str_mv |
openAccess |
| publisher |
Springer Nature |
| institution |
Consejo Superior de Investigaciones Científicas (CSIC) |
| collection |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| _version_ |
1878434699284578306 |
| publishDateSort |
2014 |
| author_browse |
Cary, Craig Cowan, Don Ríos, Asunción de los |
| publisherStr |
Springer Nature |
| score |
6,9303427 |