Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams
Abstract: The glacial streams of the McMurdo Dry Valleys have extensive cyanobacterial mats that are a probable source of fixed C and N to the Valleys. The research will examine the interplay between the microbial mats in the ephemeral glacial streams and the microbiota of the hyporheic soils (wette...
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dataone:http://get.iedadata.org/metadata/iso/600079 2024-06-03T18:46:24+00:00 Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams Cary, Stephen BEGINDATE: 2008-09-01T00:00:00Z ENDDATE: 2013-08-31T00:00:00Z 2013-01-01T00:00:00Z http://get.iedadata.org/metadata/iso/600079 unknown IEDA: US Antarctic Program Data Center Cell Counts Antarctic Organisms and Ecosystems Microbiology Biology Antarctica Biosphere Cryosphere Dry Valleys US Antarctic Program Data Center (USAP-DC) Dataset 2013 dataone:urn:node:IEDA_USAP 2024-06-03T18:11:58Z Abstract: The glacial streams of the McMurdo Dry Valleys have extensive cyanobacterial mats that are a probable source of fixed C and N to the Valleys. The research will examine the interplay between the microbial mats in the ephemeral glacial streams and the microbiota of the hyporheic soils (wetted soil zone) underlying and adjacent to those mats. It is hypothesized that the mats are important sources of organic carbon and fixed nitrogen for the soil communities of the hyporheic zone, and release dissolved organic carbon (DOC) and nitrogen (DON) that serves the entire Dry Valley ecosystem. Field efforts will entail both observational and experimental components. Direct comparisons will be made between the mats and microbial populations underlying naturally rehydrated and desiccated mat areas, and between mat areas in the melt streams of the Adams and Miers Glaciers in Miers Valley. Both physiological and phylogenetic indices of the soil microbiota will be examined. Observations will include estimates of rates of mat carbon and nitrogen fixation, soil respiration and leucine and thymidine uptake (as measures of protein & DNA synthesis, respectively) by soil bacteria, bacterial densities and their molecular ecology. Experimental manipulations will include experimental re-wetting of soils and observations of the time course of response of the microbial community. The research will integrate modern molecular genetic approaches (ARISA-DNA fingerprinting and ultra deep 16S rDNA microbial phylogenetic analysis) with geochemistry to study the diversity, ecology, and function of microbial communities that thrive in these extreme environments. The broader impacts of the project include research and educational opportunities for graduate students and a postdoctoral associate. The P.I.s will involve undergraduates as work-study students and in REU programs, and will participate in educational and outreach programs. Dataset Antarc* Antarctic Antarctica McMurdo Dry Valleys IEDA: US Antarctic Program Data Center (via DataONE) Antarctic McMurdo Dry Valleys Miers ENVELOPE(163.850,163.850,-78.100,-78.100) Miers Valley ENVELOPE(164.200,164.200,-78.100,-78.100) Reu ENVELOPE(65.600,65.600,-71.142,-71.142) |
institution |
Open Polar |
collection |
IEDA: US Antarctic Program Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:IEDA_USAP |
language |
unknown |
topic |
Cell Counts Antarctic Organisms and Ecosystems Microbiology Biology Antarctica Biosphere Cryosphere Dry Valleys US Antarctic Program Data Center (USAP-DC) |
spellingShingle |
Cell Counts Antarctic Organisms and Ecosystems Microbiology Biology Antarctica Biosphere Cryosphere Dry Valleys US Antarctic Program Data Center (USAP-DC) Cary, Stephen Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams |
topic_facet |
Cell Counts Antarctic Organisms and Ecosystems Microbiology Biology Antarctica Biosphere Cryosphere Dry Valleys US Antarctic Program Data Center (USAP-DC) |
description |
Abstract: The glacial streams of the McMurdo Dry Valleys have extensive cyanobacterial mats that are a probable source of fixed C and N to the Valleys. The research will examine the interplay between the microbial mats in the ephemeral glacial streams and the microbiota of the hyporheic soils (wetted soil zone) underlying and adjacent to those mats. It is hypothesized that the mats are important sources of organic carbon and fixed nitrogen for the soil communities of the hyporheic zone, and release dissolved organic carbon (DOC) and nitrogen (DON) that serves the entire Dry Valley ecosystem. Field efforts will entail both observational and experimental components. Direct comparisons will be made between the mats and microbial populations underlying naturally rehydrated and desiccated mat areas, and between mat areas in the melt streams of the Adams and Miers Glaciers in Miers Valley. Both physiological and phylogenetic indices of the soil microbiota will be examined. Observations will include estimates of rates of mat carbon and nitrogen fixation, soil respiration and leucine and thymidine uptake (as measures of protein & DNA synthesis, respectively) by soil bacteria, bacterial densities and their molecular ecology. Experimental manipulations will include experimental re-wetting of soils and observations of the time course of response of the microbial community. The research will integrate modern molecular genetic approaches (ARISA-DNA fingerprinting and ultra deep 16S rDNA microbial phylogenetic analysis) with geochemistry to study the diversity, ecology, and function of microbial communities that thrive in these extreme environments. The broader impacts of the project include research and educational opportunities for graduate students and a postdoctoral associate. The P.I.s will involve undergraduates as work-study students and in REU programs, and will participate in educational and outreach programs. |
format |
Dataset |
author |
Cary, Stephen |
author_facet |
Cary, Stephen |
author_sort |
Cary, Stephen |
title |
Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams |
title_short |
Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams |
title_full |
Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams |
title_fullStr |
Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams |
title_full_unstemmed |
Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams |
title_sort |
biogeochemistry of cyanobactrial mats and hyporheic zone microbes in mcmurdo dry valley glacial meltwater streams |
publisher |
IEDA: US Antarctic Program Data Center |
publishDate |
2013 |
url |
http://get.iedadata.org/metadata/iso/600079 |
op_coverage |
BEGINDATE: 2008-09-01T00:00:00Z ENDDATE: 2013-08-31T00:00:00Z |
long_lat |
ENVELOPE(163.850,163.850,-78.100,-78.100) ENVELOPE(164.200,164.200,-78.100,-78.100) ENVELOPE(65.600,65.600,-71.142,-71.142) |
geographic |
Antarctic McMurdo Dry Valleys Miers Miers Valley Reu |
geographic_facet |
Antarctic McMurdo Dry Valleys Miers Miers Valley Reu |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
_version_ |
1800873910921592832 |