Microbial community composition of transiently wetted Antarctic Dry Valley soils
During the summer months, wet (hyporheic) soils associated with ephemeral streams and lake edges in the Antarctic Dry Valleys (DV) become hotspots of biological activity and are hypothesized to be an important source of carbon and nitrogen for arid DV soils. Recent research in the DV has focused on...
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ftdoajarticles:oai:doaj.org/article:6b72067893c54feb82cedc9fb9a099e5 2023-05-15T14:05:02+02:00 Microbial community composition of transiently wetted Antarctic Dry Valley soils Thomas D. Neiderberger Jill A. Sohm Troy E. Gunderson Alexander E. Parker Joelle eTirindelli Douglas G Capone Edward J. Carpenter Stephen Craig Cary 2015-01-01T00:00:00Z https://doi.org/10.3389/fmicb.2015.00009 https://doaj.org/article/6b72067893c54feb82cedc9fb9a099e5 EN eng Frontiers Media S.A. http://journal.frontiersin.org/Journal/10.3389/fmicb.2015.00009/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2015.00009 https://doaj.org/article/6b72067893c54feb82cedc9fb9a099e5 Frontiers in Microbiology, Vol 6 (2015) microbial community Microbial Diversity Antarctica hyporheic Dry valley Microbiology QR1-502 article 2015 ftdoajarticles https://doi.org/10.3389/fmicb.2015.00009 2022-12-31T03:59:26Z During the summer months, wet (hyporheic) soils associated with ephemeral streams and lake edges in the Antarctic Dry Valleys (DV) become hotspots of biological activity and are hypothesized to be an important source of carbon and nitrogen for arid DV soils. Recent research in the DV has focused on the geochemistry and microbial ecology of lakes and arid soils, with substantially less information being available on hyporheic soils. Here we determined the unique properties of hyporheic microbial communities, resolved their relationship to environmental parameters and to compared them to archetypal arid DV soils. Generally, pH increased and chlorophyll a concentrations decreased along transects from wet to arid soils (9.0 to ~7.0 for pH and ~0.8 to ~ 5 µg/cm3 for chlorophyll a, respectively). Soil water content decreased to below ~3% in the arid soils. Community fingerprinting-based principle component analyses revealed that bacterial communities formed distinct clusters specific to arid and wet soils; however, eukaryotic communities that clustered together did not have similar soil moisture content nor did they group together based on sampling location. Collectively, rRNA pyrosequencing indicated a considerably higher abundance of Cyanobacteria in wet soils and a higher abundance of Acidobacterial, Actinobacterial, Deinococcus/Thermus, Bacteroidetes, Firmicutes, Gemmatimonadetes, Nitrospira and Planctomycetes in arid soils. The two most significant differences at the genus level were Gillisia signatures present in arid soils and chloroplast signatures related to Streptophyta that were common in wet soils. Fungal dominance was observed in arid soils and Viridplantae were more common in wet soils. This research represents an in-depth characterization of microbial communities inhabiting wet DV soils. Results indicate that the repeated wetting of hyporheic zones has a profound impact on the bacterial and eukaryotic communities inhabiting in these areas. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Frontiers in Microbiology 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
microbial community Microbial Diversity Antarctica hyporheic Dry valley Microbiology QR1-502 |
spellingShingle |
microbial community Microbial Diversity Antarctica hyporheic Dry valley Microbiology QR1-502 Thomas D. Neiderberger Jill A. Sohm Troy E. Gunderson Alexander E. Parker Joelle eTirindelli Douglas G Capone Edward J. Carpenter Stephen Craig Cary Microbial community composition of transiently wetted Antarctic Dry Valley soils |
topic_facet |
microbial community Microbial Diversity Antarctica hyporheic Dry valley Microbiology QR1-502 |
description |
During the summer months, wet (hyporheic) soils associated with ephemeral streams and lake edges in the Antarctic Dry Valleys (DV) become hotspots of biological activity and are hypothesized to be an important source of carbon and nitrogen for arid DV soils. Recent research in the DV has focused on the geochemistry and microbial ecology of lakes and arid soils, with substantially less information being available on hyporheic soils. Here we determined the unique properties of hyporheic microbial communities, resolved their relationship to environmental parameters and to compared them to archetypal arid DV soils. Generally, pH increased and chlorophyll a concentrations decreased along transects from wet to arid soils (9.0 to ~7.0 for pH and ~0.8 to ~ 5 µg/cm3 for chlorophyll a, respectively). Soil water content decreased to below ~3% in the arid soils. Community fingerprinting-based principle component analyses revealed that bacterial communities formed distinct clusters specific to arid and wet soils; however, eukaryotic communities that clustered together did not have similar soil moisture content nor did they group together based on sampling location. Collectively, rRNA pyrosequencing indicated a considerably higher abundance of Cyanobacteria in wet soils and a higher abundance of Acidobacterial, Actinobacterial, Deinococcus/Thermus, Bacteroidetes, Firmicutes, Gemmatimonadetes, Nitrospira and Planctomycetes in arid soils. The two most significant differences at the genus level were Gillisia signatures present in arid soils and chloroplast signatures related to Streptophyta that were common in wet soils. Fungal dominance was observed in arid soils and Viridplantae were more common in wet soils. This research represents an in-depth characterization of microbial communities inhabiting wet DV soils. Results indicate that the repeated wetting of hyporheic zones has a profound impact on the bacterial and eukaryotic communities inhabiting in these areas. |
format |
Article in Journal/Newspaper |
author |
Thomas D. Neiderberger Jill A. Sohm Troy E. Gunderson Alexander E. Parker Joelle eTirindelli Douglas G Capone Edward J. Carpenter Stephen Craig Cary |
author_facet |
Thomas D. Neiderberger Jill A. Sohm Troy E. Gunderson Alexander E. Parker Joelle eTirindelli Douglas G Capone Edward J. Carpenter Stephen Craig Cary |
author_sort |
Thomas D. Neiderberger |
title |
Microbial community composition of transiently wetted Antarctic Dry Valley soils |
title_short |
Microbial community composition of transiently wetted Antarctic Dry Valley soils |
title_full |
Microbial community composition of transiently wetted Antarctic Dry Valley soils |
title_fullStr |
Microbial community composition of transiently wetted Antarctic Dry Valley soils |
title_full_unstemmed |
Microbial community composition of transiently wetted Antarctic Dry Valley soils |
title_sort |
microbial community composition of transiently wetted antarctic dry valley soils |
publisher |
Frontiers Media S.A. |
publishDate |
2015 |
url |
https://doi.org/10.3389/fmicb.2015.00009 https://doaj.org/article/6b72067893c54feb82cedc9fb9a099e5 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Frontiers in Microbiology, Vol 6 (2015) |
op_relation |
http://journal.frontiersin.org/Journal/10.3389/fmicb.2015.00009/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2015.00009 https://doaj.org/article/6b72067893c54feb82cedc9fb9a099e5 |
op_doi |
https://doi.org/10.3389/fmicb.2015.00009 |
container_title |
Frontiers in Microbiology |
container_volume |
6 |
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1766276667769094144 |