Iron and carbon limitation of prokaryotic growth in the ocean
Studies were undertaken to examine the roles of iron and carbon in modulating prokaryotic growth in the ocean. The context of the first study was an open-open iron fertilization experiment in the high nutrient, low chlorophyll (HNLC) regime in the Southern Ocean. The context of the second study was...
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ftwilliammarycol:oai:scholarworks.wm.edu:etd-2364 2023-06-11T04:04:58+02:00 Iron and carbon limitation of prokaryotic growth in the ocean Oliver, Jacques L. 2005-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/etd/1539616797 https://doi.org/10.25773/v5-ed0n-v453 https://scholarworks.wm.edu/context/etd/article/2364/viewcontent/3177670.pdf English eng W&M ScholarWorks https://scholarworks.wm.edu/etd/1539616797 doi:doi:10.25773/v5-ed0n-v453 https://scholarworks.wm.edu/context/etd/article/2364/viewcontent/3177670.pdf © The Author Dissertations, Theses, and Masters Projects Biogeochemistry Marine Biology Microbiology text 2005 ftwilliammarycol https://doi.org/10.25773/v5-ed0n-v453 2023-05-04T17:38:54Z Studies were undertaken to examine the roles of iron and carbon in modulating prokaryotic growth in the ocean. The context of the first study was an open-open iron fertilization experiment in the high nutrient, low chlorophyll (HNLC) regime in the Southern Ocean. The context of the second study was the oligotrophic, iron-replete, and organic carbon-limited northwest Sargasso Sea. Experimental sea water cultures were amended with an iron chelator, desferrioxamine B (DFOB), and other nutrients to examine the effects of iron and carbon limitation on growth. In the first study prokaryotic abundance, carbon production, and growth rate increased in response to iron in two experimental locations north and south of the Antarctic Polar Front Zone (North Patch and South Patch, respectively). However, prokaryotes responded indirectly to iron-induced phytoplankton production. Prokaryotic production was highly correlated to particulate primary production (r2 = 0.80). Prokaryotes comprised a larger percentage of particulate organic carbon (POC) in the North versus the South Patch relative to non-fertilized waters. Analysis of prokaryotic community structure was also examined. Results showed unique prokaryotic communities existed in the North and South Patch for both iron-fertilized and non-fertilized waters. Additionally, community composition shifted over time in the South Patch and was distinct from non-fertilized waters. Measures of community diversity indicated an increase in taxonomic richness and diversity in iron-fertilized waters over time. Specific taxonomic groups monitored over time in the South Patch exhibited a differential response to the iron-induced phytoplankton bloom. at the domain level, the biomass response was greater for Eubacteria compared to Archaea. at the clade level, Cytophaga-Flavobacteria net biomass yields outpaced SAR11, although both exhibited significant increases (p < 0.05) in net growth rate over time in the South Patch. In the second study DFOB did not limit utilization of organic carbon ... Text Antarc* Antarctic Southern Ocean W&M ScholarWorks Antarctic Southern Ocean The Antarctic |
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W&M ScholarWorks |
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English |
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Biogeochemistry Marine Biology Microbiology |
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Biogeochemistry Marine Biology Microbiology Oliver, Jacques L. Iron and carbon limitation of prokaryotic growth in the ocean |
topic_facet |
Biogeochemistry Marine Biology Microbiology |
description |
Studies were undertaken to examine the roles of iron and carbon in modulating prokaryotic growth in the ocean. The context of the first study was an open-open iron fertilization experiment in the high nutrient, low chlorophyll (HNLC) regime in the Southern Ocean. The context of the second study was the oligotrophic, iron-replete, and organic carbon-limited northwest Sargasso Sea. Experimental sea water cultures were amended with an iron chelator, desferrioxamine B (DFOB), and other nutrients to examine the effects of iron and carbon limitation on growth. In the first study prokaryotic abundance, carbon production, and growth rate increased in response to iron in two experimental locations north and south of the Antarctic Polar Front Zone (North Patch and South Patch, respectively). However, prokaryotes responded indirectly to iron-induced phytoplankton production. Prokaryotic production was highly correlated to particulate primary production (r2 = 0.80). Prokaryotes comprised a larger percentage of particulate organic carbon (POC) in the North versus the South Patch relative to non-fertilized waters. Analysis of prokaryotic community structure was also examined. Results showed unique prokaryotic communities existed in the North and South Patch for both iron-fertilized and non-fertilized waters. Additionally, community composition shifted over time in the South Patch and was distinct from non-fertilized waters. Measures of community diversity indicated an increase in taxonomic richness and diversity in iron-fertilized waters over time. Specific taxonomic groups monitored over time in the South Patch exhibited a differential response to the iron-induced phytoplankton bloom. at the domain level, the biomass response was greater for Eubacteria compared to Archaea. at the clade level, Cytophaga-Flavobacteria net biomass yields outpaced SAR11, although both exhibited significant increases (p < 0.05) in net growth rate over time in the South Patch. In the second study DFOB did not limit utilization of organic carbon ... |
format |
Text |
author |
Oliver, Jacques L. |
author_facet |
Oliver, Jacques L. |
author_sort |
Oliver, Jacques L. |
title |
Iron and carbon limitation of prokaryotic growth in the ocean |
title_short |
Iron and carbon limitation of prokaryotic growth in the ocean |
title_full |
Iron and carbon limitation of prokaryotic growth in the ocean |
title_fullStr |
Iron and carbon limitation of prokaryotic growth in the ocean |
title_full_unstemmed |
Iron and carbon limitation of prokaryotic growth in the ocean |
title_sort |
iron and carbon limitation of prokaryotic growth in the ocean |
publisher |
W&M ScholarWorks |
publishDate |
2005 |
url |
https://scholarworks.wm.edu/etd/1539616797 https://doi.org/10.25773/v5-ed0n-v453 https://scholarworks.wm.edu/context/etd/article/2364/viewcontent/3177670.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Dissertations, Theses, and Masters Projects |
op_relation |
https://scholarworks.wm.edu/etd/1539616797 doi:doi:10.25773/v5-ed0n-v453 https://scholarworks.wm.edu/context/etd/article/2364/viewcontent/3177670.pdf |
op_rights |
© The Author |
op_doi |
https://doi.org/10.25773/v5-ed0n-v453 |
_version_ |
1768392290866298880 |