Environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from Lake Fryxell, Antarctica
Abstract Bacteriohopanepolyols ( BHP s) are pentacyclic triterpenoid lipids that contribute to the structural integrity and physiology of some bacteria. Because some BHP s originate from specific classes of bacteria, BHP s have potential as taxonomically and environmentally diagnostic biomarkers. Fo...
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crwiley:10.1111/gbi.12353 2024-09-15T17:46:49+00:00 Environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from Lake Fryxell, Antarctica Matys, Emily D. Mackey, Tyler Grettenberger, Christen Mueller, Elliott Jungblut, Anne Sumner, Dawn Y. Hawes, Ian Summons, Roger E. NASA Astrobiology Institute 2019 http://dx.doi.org/10.1111/gbi.12353 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgbi.12353 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gbi.12353 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gbi.12353 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Geobiology volume 17, issue 5, page 551-563 ISSN 1472-4677 1472-4669 journal-article 2019 crwiley https://doi.org/10.1111/gbi.12353 2024-09-05T05:07:26Z Abstract Bacteriohopanepolyols ( BHP s) are pentacyclic triterpenoid lipids that contribute to the structural integrity and physiology of some bacteria. Because some BHP s originate from specific classes of bacteria, BHP s have potential as taxonomically and environmentally diagnostic biomarkers. For example, a stereoisomer of bacteriohopanetetrol (informally BHT II ) has been associated with anaerobic ammonium oxidation (anammox) bacteria and suboxic to anoxic marine environments where anammox is active. As a result, the detection of BHT II in the sedimentary record and fluctuations in the relative abundance of BHT II may inform reconstructions of nitrogen cycling and ocean redox changes through the geological record. However, there are uncertainties concerning the sources of BHT II and whether or not BHT II is produced in abundance in non‐marine environments, both of which are pertinent to interpretations of BHT II signatures in sediments. To address these questions, we investigate the BHP composition of benthic microbial mats from Lake Fryxell, Antarctica. Lake Fryxell is a perennially ice‐covered lake with a sharp oxycline in a density‐stabilized water column. We describe the diversity and abundance of BHP s in benthic microbial mats across a transect from oxic to anoxic conditions. Generally, BHP abundances and diversity vary with the morphologies of microbial mats, which were previously shown to reflect local environmental conditions, such as irradiance and oxygen and sulfide concentrations. BHT II was identified in mats that exist within oxic to anoxic portions of the lake. However, anammox bacteria have yet to be identified in Lake Fryxell. We examine our results in the context of BHP s as biomarkers in modern and ancient environments. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Geobiology 17 5 551 563 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Bacteriohopanepolyols ( BHP s) are pentacyclic triterpenoid lipids that contribute to the structural integrity and physiology of some bacteria. Because some BHP s originate from specific classes of bacteria, BHP s have potential as taxonomically and environmentally diagnostic biomarkers. For example, a stereoisomer of bacteriohopanetetrol (informally BHT II ) has been associated with anaerobic ammonium oxidation (anammox) bacteria and suboxic to anoxic marine environments where anammox is active. As a result, the detection of BHT II in the sedimentary record and fluctuations in the relative abundance of BHT II may inform reconstructions of nitrogen cycling and ocean redox changes through the geological record. However, there are uncertainties concerning the sources of BHT II and whether or not BHT II is produced in abundance in non‐marine environments, both of which are pertinent to interpretations of BHT II signatures in sediments. To address these questions, we investigate the BHP composition of benthic microbial mats from Lake Fryxell, Antarctica. Lake Fryxell is a perennially ice‐covered lake with a sharp oxycline in a density‐stabilized water column. We describe the diversity and abundance of BHP s in benthic microbial mats across a transect from oxic to anoxic conditions. Generally, BHP abundances and diversity vary with the morphologies of microbial mats, which were previously shown to reflect local environmental conditions, such as irradiance and oxygen and sulfide concentrations. BHT II was identified in mats that exist within oxic to anoxic portions of the lake. However, anammox bacteria have yet to be identified in Lake Fryxell. We examine our results in the context of BHP s as biomarkers in modern and ancient environments. |
author2 |
NASA Astrobiology Institute |
format |
Article in Journal/Newspaper |
author |
Matys, Emily D. Mackey, Tyler Grettenberger, Christen Mueller, Elliott Jungblut, Anne Sumner, Dawn Y. Hawes, Ian Summons, Roger E. |
spellingShingle |
Matys, Emily D. Mackey, Tyler Grettenberger, Christen Mueller, Elliott Jungblut, Anne Sumner, Dawn Y. Hawes, Ian Summons, Roger E. Environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from Lake Fryxell, Antarctica |
author_facet |
Matys, Emily D. Mackey, Tyler Grettenberger, Christen Mueller, Elliott Jungblut, Anne Sumner, Dawn Y. Hawes, Ian Summons, Roger E. |
author_sort |
Matys, Emily D. |
title |
Environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from Lake Fryxell, Antarctica |
title_short |
Environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from Lake Fryxell, Antarctica |
title_full |
Environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from Lake Fryxell, Antarctica |
title_fullStr |
Environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from Lake Fryxell, Antarctica |
title_full_unstemmed |
Environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from Lake Fryxell, Antarctica |
title_sort |
environmental controls on bacteriohopanepolyol profiles of benthic microbial mats from lake fryxell, antarctica |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/gbi.12353 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgbi.12353 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gbi.12353 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gbi.12353 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Geobiology volume 17, issue 5, page 551-563 ISSN 1472-4677 1472-4669 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gbi.12353 |
container_title |
Geobiology |
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17 |
container_issue |
5 |
container_start_page |
551 |
op_container_end_page |
563 |
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1810495197951295488 |