Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils
This data-set contains nucleotide sequences associated with the following described study. In this study, C-fixation rates measured in the bulk arid soils (<5% moisture) ranged from below detection limits to ~12 nmol C/cc/h. Rates in ephemerally wet soils ranged from ~20 to 750 nmol C/cc/h, equat...
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2015
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dataone:knb.756.1 2023-11-08T14:14:08+01:00 Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils University of Delaware Thomas Niederberger Samples for this study were collected from the Miers Valley region of Antarctica. Miers Valley is located at the southern region of the McMurdo Dry Valleys in Victoria Land and has two glaciers located at the upper (west) end of the valley: Miers Glacier is situated at the northern side and Adams Glacier on the southern side of the Valley. During the summer months, meltwater streams from both glaciers flow into the permanently ice-covered Lake Miers. A number of hyporheic zones and wetted lake boundaries as were sampled along transects during 2 sampling expeditions in 2009. ENVELOPE(163.7469,163.7469,-78.0956,-78.0956) BEGINDATE: 2009-01-01T00:00:00Z ENDDATE: 2009-12-01T00:00:00Z 2015-07-20T00:00:00Z https://search.dataone.org/view/knb.756.1 unknown Knowledge Network for Biocomplexity Antarctica Dry Valley Dataset 2015 dataone:urn:node:KNB 2023-11-08T13:37:37Z This data-set contains nucleotide sequences associated with the following described study. In this study, C-fixation rates measured in the bulk arid soils (<5% moisture) ranged from below detection limits to ~12 nmol C/cc/h. Rates in ephemerally wet soils ranged from ~20 to 750 nmol C/cc/h, equating to turnover rates of ~7 days to 140 days, with lower rates in stream-associated soils as compared to lake-associated soils. Analysis of the gene encoding the large subunit of RuBisCO (cbbL) in these soils identified green-type sequences dominated by the 1B cyanobacterial-related phylotype in both arid and wet soils including the RNA fraction of the wet soil. Red-type cbbL genes were dominated by 1C actinobacterial-related phylotypes in arid soils, with wetted soils containing nearly equal proportions of 1C (actinobacterial and proteobacterial signatures) and 1D (algal) related phylotypes. Complementary 16S rRNA and 18S rRNA gene sequencing also revealed distinct differences in community structure between biotopes. This study is the first of its kind to examine C-fixation rates in Dry Valley soils and the microorganisms potentially responsible for these activities. Dataset Adams Glacier Antarc* Antarctic Antarctica McMurdo Dry Valleys Victoria Land Knowledge Network for Biocomplexity (via DataONE) Antarctic Victoria Land McMurdo Dry Valleys Miers ENVELOPE(163.850,163.850,-78.100,-78.100) Miers Valley ENVELOPE(164.200,164.200,-78.100,-78.100) Adams Glacier ENVELOPE(-74.412,-74.412,81.630,81.630) Lake Miers ENVELOPE(-60.450,-60.450,-62.717,-62.717) Miers Glacier ENVELOPE(163.667,163.667,-78.083,-78.083) ENVELOPE(163.7469,163.7469,-78.0956,-78.0956) |
institution |
Open Polar |
collection |
Knowledge Network for Biocomplexity (via DataONE) |
op_collection_id |
dataone:urn:node:KNB |
language |
unknown |
topic |
Antarctica Dry Valley |
spellingShingle |
Antarctica Dry Valley University of Delaware Thomas Niederberger Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils |
topic_facet |
Antarctica Dry Valley |
description |
This data-set contains nucleotide sequences associated with the following described study. In this study, C-fixation rates measured in the bulk arid soils (<5% moisture) ranged from below detection limits to ~12 nmol C/cc/h. Rates in ephemerally wet soils ranged from ~20 to 750 nmol C/cc/h, equating to turnover rates of ~7 days to 140 days, with lower rates in stream-associated soils as compared to lake-associated soils. Analysis of the gene encoding the large subunit of RuBisCO (cbbL) in these soils identified green-type sequences dominated by the 1B cyanobacterial-related phylotype in both arid and wet soils including the RNA fraction of the wet soil. Red-type cbbL genes were dominated by 1C actinobacterial-related phylotypes in arid soils, with wetted soils containing nearly equal proportions of 1C (actinobacterial and proteobacterial signatures) and 1D (algal) related phylotypes. Complementary 16S rRNA and 18S rRNA gene sequencing also revealed distinct differences in community structure between biotopes. This study is the first of its kind to examine C-fixation rates in Dry Valley soils and the microorganisms potentially responsible for these activities. |
format |
Dataset |
author |
University of Delaware Thomas Niederberger |
author_facet |
University of Delaware Thomas Niederberger |
author_sort |
University of Delaware |
title |
Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils |
title_short |
Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils |
title_full |
Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils |
title_fullStr |
Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils |
title_full_unstemmed |
Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils |
title_sort |
carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet antarctic dry valley soils |
publisher |
Knowledge Network for Biocomplexity |
publishDate |
2015 |
url |
https://search.dataone.org/view/knb.756.1 |
op_coverage |
Samples for this study were collected from the Miers Valley region of Antarctica. Miers Valley is located at the southern region of the McMurdo Dry Valleys in Victoria Land and has two glaciers located at the upper (west) end of the valley: Miers Glacier is situated at the northern side and Adams Glacier on the southern side of the Valley. During the summer months, meltwater streams from both glaciers flow into the permanently ice-covered Lake Miers. A number of hyporheic zones and wetted lake boundaries as were sampled along transects during 2 sampling expeditions in 2009. ENVELOPE(163.7469,163.7469,-78.0956,-78.0956) BEGINDATE: 2009-01-01T00:00:00Z ENDDATE: 2009-12-01T00:00:00Z |
long_lat |
ENVELOPE(163.850,163.850,-78.100,-78.100) ENVELOPE(164.200,164.200,-78.100,-78.100) ENVELOPE(-74.412,-74.412,81.630,81.630) ENVELOPE(-60.450,-60.450,-62.717,-62.717) ENVELOPE(163.667,163.667,-78.083,-78.083) ENVELOPE(163.7469,163.7469,-78.0956,-78.0956) |
geographic |
Antarctic Victoria Land McMurdo Dry Valleys Miers Miers Valley Adams Glacier Lake Miers Miers Glacier |
geographic_facet |
Antarctic Victoria Land McMurdo Dry Valleys Miers Miers Valley Adams Glacier Lake Miers Miers Glacier |
genre |
Adams Glacier Antarc* Antarctic Antarctica McMurdo Dry Valleys Victoria Land |
genre_facet |
Adams Glacier Antarc* Antarctic Antarctica McMurdo Dry Valleys Victoria Land |
_version_ |
1782012122265288704 |