Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars
Cryptoendolithic microbial communities living within Antarctic rocks are an example of survival in an extremely cold and dry environment. The extinction of these micro-organisms formerly colonizing sandstone in the Mount Fleming area (Ross Desert), was probably provoked by the hostile environment. T...
Published in: | International Journal of Astrobiology |
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/s1473550402001052 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550402001052 |
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crcambridgeupr:10.1017/s1473550402001052 2023-05-15T14:07:39+02:00 Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars Wierzchos, Jacek Ascaso, Carmen 2002 http://dx.doi.org/10.1017/s1473550402001052 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550402001052 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms International Journal of Astrobiology volume 1, issue 1, page 51-59 ISSN 1473-5504 1475-3006 Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Physics and Astronomy (miscellaneous) Ecology, Evolution, Behavior and Systematics journal-article 2002 crcambridgeupr https://doi.org/10.1017/s1473550402001052 2022-08-23T16:57:13Z Cryptoendolithic microbial communities living within Antarctic rocks are an example of survival in an extremely cold and dry environment. The extinction of these micro-organisms formerly colonizing sandstone in the Mount Fleming area (Ross Desert), was probably provoked by the hostile environment. This is considered to be a good terrestrial analogue of the first stage of the disappearance of possible life on early Mars. To date, only macroscopically observed indirect biomarkers of the past activity of cryptoendoliths in Antarctic rocks have been described. The present paper confirms, for the first time, the existence of cryptoendolith microbial fossils within these sandstone rocks. The novel in situ application of scanning electron microscopy with backscattered electron imaging and simultaneous use of X-ray energy dispersive spectroscopy allowed the clear detection of microfossils left behind by Antarctic endoliths. Careful interpretation of the morphological features of cells, such as preserved cell walls in algae, fungi and bacteria, cytoplasm elements such as chloroplast membranes in algae and organic matter traces, mineral associations, and the spatial context of these structures all point to their identification as cryptoendolith microfossils. This type of investigation will prompt the development of research strategies aimed at locating and identifying the signs that Martian microbiota, probably only bacteria if they existed, may have been left for us to see. Article in Journal/Newspaper Antarc* Antarctic Antarctica Cambridge University Press (via Crossref) Antarctic Mount Fleming ENVELOPE(162.633,162.633,-75.167,-75.167) International Journal of Astrobiology 1 1 51 59 |
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Open Polar |
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Cambridge University Press (via Crossref) |
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crcambridgeupr |
language |
English |
topic |
Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Physics and Astronomy (miscellaneous) Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Physics and Astronomy (miscellaneous) Ecology, Evolution, Behavior and Systematics Wierzchos, Jacek Ascaso, Carmen Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars |
topic_facet |
Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Physics and Astronomy (miscellaneous) Ecology, Evolution, Behavior and Systematics |
description |
Cryptoendolithic microbial communities living within Antarctic rocks are an example of survival in an extremely cold and dry environment. The extinction of these micro-organisms formerly colonizing sandstone in the Mount Fleming area (Ross Desert), was probably provoked by the hostile environment. This is considered to be a good terrestrial analogue of the first stage of the disappearance of possible life on early Mars. To date, only macroscopically observed indirect biomarkers of the past activity of cryptoendoliths in Antarctic rocks have been described. The present paper confirms, for the first time, the existence of cryptoendolith microbial fossils within these sandstone rocks. The novel in situ application of scanning electron microscopy with backscattered electron imaging and simultaneous use of X-ray energy dispersive spectroscopy allowed the clear detection of microfossils left behind by Antarctic endoliths. Careful interpretation of the morphological features of cells, such as preserved cell walls in algae, fungi and bacteria, cytoplasm elements such as chloroplast membranes in algae and organic matter traces, mineral associations, and the spatial context of these structures all point to their identification as cryptoendolith microfossils. This type of investigation will prompt the development of research strategies aimed at locating and identifying the signs that Martian microbiota, probably only bacteria if they existed, may have been left for us to see. |
format |
Article in Journal/Newspaper |
author |
Wierzchos, Jacek Ascaso, Carmen |
author_facet |
Wierzchos, Jacek Ascaso, Carmen |
author_sort |
Wierzchos, Jacek |
title |
Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars |
title_short |
Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars |
title_full |
Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars |
title_fullStr |
Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars |
title_full_unstemmed |
Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars |
title_sort |
microbial fossil record of rocks from the ross desert, antarctica: implications in the search for past life on mars |
publisher |
Cambridge University Press (CUP) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1017/s1473550402001052 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550402001052 |
long_lat |
ENVELOPE(162.633,162.633,-75.167,-75.167) |
geographic |
Antarctic Mount Fleming |
geographic_facet |
Antarctic Mount Fleming |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
International Journal of Astrobiology volume 1, issue 1, page 51-59 ISSN 1473-5504 1475-3006 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s1473550402001052 |
container_title |
International Journal of Astrobiology |
container_volume |
1 |
container_issue |
1 |
container_start_page |
51 |
op_container_end_page |
59 |
_version_ |
1766279654750027776 |