Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment
The weathering of silicate in the world's critical-zone (rock-soil interface) is a natural mechanism providing a feedback on atmospheric CO2 concentrations through the carbonate-silicate cycle. We examined culturable bacterial communities from a critical-zone in western Iceland to determine the...
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Taylor & Francis
2016
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Online Access: | http://nora.nerc.ac.uk/id/eprint/511408/ https://nora.nerc.ac.uk/id/eprint/511408/1/N511408PP.pdf https://doi.org/10.1080/01490451.2015.1039672 |
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ftnerc:oai:nora.nerc.ac.uk:511408 2023-05-15T16:50:24+02:00 Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment Summers, Stephen Thomson, Bruce C. Whiteley, Andrew S. Cockell, Charles S. 2016-01 text http://nora.nerc.ac.uk/id/eprint/511408/ https://nora.nerc.ac.uk/id/eprint/511408/1/N511408PP.pdf https://doi.org/10.1080/01490451.2015.1039672 en eng Taylor & Francis https://nora.nerc.ac.uk/id/eprint/511408/1/N511408PP.pdf Summers, Stephen; Thomson, Bruce C.; Whiteley, Andrew S.; Cockell, Charles S. 2016 Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment. Geomicrobiology Journal, 33 (1). 52-62. https://doi.org/10.1080/01490451.2015.1039672 <https://doi.org/10.1080/01490451.2015.1039672> Agriculture and Soil Science Biology and Microbiology Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1080/01490451.2015.1039672 2023-02-04T19:41:57Z The weathering of silicate in the world's critical-zone (rock-soil interface) is a natural mechanism providing a feedback on atmospheric CO2 concentrations through the carbonate-silicate cycle. We examined culturable bacterial communities from a critical-zone in western Iceland to determine the optimum growth temperature, ability to solubilise phosphate-containing minerals, which are abundant within the critical-zone area examined here. The majority of isolated bacteria were able to solubilize mineral-state phosphate. Almost all bacterial isolates were mesophilic (growth optima of 20–45°C), despite critical-zone temperatures that were continuously below 15°C, although all isolates could grow at temperatures associated with the critical-zone (−2.8 – 13.1°C). Only three isolates were shown to have thermal optima for growth that were within temperatures experienced at the critical-zone. These findings show that the bacteria that inhabit the western Icelandic critical-zone have temperature growth optima suboptimally adapted to their environment, implying that other adaptations may be more important for their long-term persistance in this environment. Moreover, our study showed that the cold basaltic critical-zone is a region of active phosphate mineral-weathering. Article in Journal/Newspaper Iceland Natural Environment Research Council: NERC Open Research Archive Geomicrobiology Journal 33 1 52 62 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
topic |
Agriculture and Soil Science Biology and Microbiology |
spellingShingle |
Agriculture and Soil Science Biology and Microbiology Summers, Stephen Thomson, Bruce C. Whiteley, Andrew S. Cockell, Charles S. Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment |
topic_facet |
Agriculture and Soil Science Biology and Microbiology |
description |
The weathering of silicate in the world's critical-zone (rock-soil interface) is a natural mechanism providing a feedback on atmospheric CO2 concentrations through the carbonate-silicate cycle. We examined culturable bacterial communities from a critical-zone in western Iceland to determine the optimum growth temperature, ability to solubilise phosphate-containing minerals, which are abundant within the critical-zone area examined here. The majority of isolated bacteria were able to solubilize mineral-state phosphate. Almost all bacterial isolates were mesophilic (growth optima of 20–45°C), despite critical-zone temperatures that were continuously below 15°C, although all isolates could grow at temperatures associated with the critical-zone (−2.8 – 13.1°C). Only three isolates were shown to have thermal optima for growth that were within temperatures experienced at the critical-zone. These findings show that the bacteria that inhabit the western Icelandic critical-zone have temperature growth optima suboptimally adapted to their environment, implying that other adaptations may be more important for their long-term persistance in this environment. Moreover, our study showed that the cold basaltic critical-zone is a region of active phosphate mineral-weathering. |
format |
Article in Journal/Newspaper |
author |
Summers, Stephen Thomson, Bruce C. Whiteley, Andrew S. Cockell, Charles S. |
author_facet |
Summers, Stephen Thomson, Bruce C. Whiteley, Andrew S. Cockell, Charles S. |
author_sort |
Summers, Stephen |
title |
Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment |
title_short |
Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment |
title_full |
Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment |
title_fullStr |
Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment |
title_full_unstemmed |
Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment |
title_sort |
mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment |
publisher |
Taylor & Francis |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/511408/ https://nora.nerc.ac.uk/id/eprint/511408/1/N511408PP.pdf https://doi.org/10.1080/01490451.2015.1039672 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
https://nora.nerc.ac.uk/id/eprint/511408/1/N511408PP.pdf Summers, Stephen; Thomson, Bruce C.; Whiteley, Andrew S.; Cockell, Charles S. 2016 Mesophilic mineral-weathering bacteria inhabit the critical-zone of a perennially cold basaltic environment. Geomicrobiology Journal, 33 (1). 52-62. https://doi.org/10.1080/01490451.2015.1039672 <https://doi.org/10.1080/01490451.2015.1039672> |
op_doi |
https://doi.org/10.1080/01490451.2015.1039672 |
container_title |
Geomicrobiology Journal |
container_volume |
33 |
container_issue |
1 |
container_start_page |
52 |
op_container_end_page |
62 |
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1766040556641714176 |