Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes
This research examines the importance of bottom-up and top-down controls on bacterial abundance and community composition during summertime production in the coastal Arctic Ocean. Bacterial and viral abundance, bacterial community composition, and free-living (3 µm-filtered, FL) and particle-associa...
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ftunivgeorgia:oai:athenaeum.libs.uga.edu:10724/29196 2023-05-15T14:51:39+02:00 Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes Hodges, Lisa Renee 2002-08 http://hdl.handle.net/10724/29196 http://purl.galileo.usg.edu/uga_etd/hodges_lisa_r_200208_ms Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes unknown uga hodges_lisa_r_200208_ms http://purl.galileo.usg.edu/uga_etd/hodges_lisa_r_200208_ms http://hdl.handle.net/10724/29196 public Bacterioplankton Bacterial abundance Viral abundance Bacterial community composition DGGE Particle-associated bacteria Free-living bacteria Psychrophiles Arctic Marine Thesis 2002 ftunivgeorgia 2020-09-24T10:04:56Z This research examines the importance of bottom-up and top-down controls on bacterial abundance and community composition during summertime production in the coastal Arctic Ocean. Bacterial and viral abundance, bacterial community composition, and free-living (3 µm-filtered, FL) and particle-associated (unfiltered, FL+PA) assemblages were examined in the Chukchi Sea during August 2000. Nutrients, chlorophyll a, and particulate organic matter (POM) were also measured. Bacteria were isolated and analyzed by DGGE, 16S rDNA sequence analysis, and for substrate utilization. Increased bacterial and viral abundance, decreased species richness, and decreased similarity (Sorenson’s Index) between FL and PA assemblages occurred in high versus low POM regions. Bacterial abundance, species richness, and Sorenson’s Index correlated best with POM, while viral abundance correlated best with bacterial abundance. Algal bloom conditions producing high POM concentrations may therefore increase bacterial and viral abundance, reducing species richness, and promote differences between FL and PA assemblages. MS Marine Sciences Marine Sciences Patricia Yager Patricia Yager James Hollibaugh Mary Ann Moran Thesis Arctic Arctic Ocean Chukchi Chukchi Sea University of Georgia: Athenaeum@UGA Arctic Arctic Ocean Chukchi Sea |
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Open Polar |
collection |
University of Georgia: Athenaeum@UGA |
op_collection_id |
ftunivgeorgia |
language |
unknown |
topic |
Bacterioplankton Bacterial abundance Viral abundance Bacterial community composition DGGE Particle-associated bacteria Free-living bacteria Psychrophiles Arctic Marine |
spellingShingle |
Bacterioplankton Bacterial abundance Viral abundance Bacterial community composition DGGE Particle-associated bacteria Free-living bacteria Psychrophiles Arctic Marine Hodges, Lisa Renee Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes |
topic_facet |
Bacterioplankton Bacterial abundance Viral abundance Bacterial community composition DGGE Particle-associated bacteria Free-living bacteria Psychrophiles Arctic Marine |
description |
This research examines the importance of bottom-up and top-down controls on bacterial abundance and community composition during summertime production in the coastal Arctic Ocean. Bacterial and viral abundance, bacterial community composition, and free-living (3 µm-filtered, FL) and particle-associated (unfiltered, FL+PA) assemblages were examined in the Chukchi Sea during August 2000. Nutrients, chlorophyll a, and particulate organic matter (POM) were also measured. Bacteria were isolated and analyzed by DGGE, 16S rDNA sequence analysis, and for substrate utilization. Increased bacterial and viral abundance, decreased species richness, and decreased similarity (Sorenson’s Index) between FL and PA assemblages occurred in high versus low POM regions. Bacterial abundance, species richness, and Sorenson’s Index correlated best with POM, while viral abundance correlated best with bacterial abundance. Algal bloom conditions producing high POM concentrations may therefore increase bacterial and viral abundance, reducing species richness, and promote differences between FL and PA assemblages. MS Marine Sciences Marine Sciences Patricia Yager Patricia Yager James Hollibaugh Mary Ann Moran |
format |
Thesis |
author |
Hodges, Lisa Renee |
author_facet |
Hodges, Lisa Renee |
author_sort |
Hodges, Lisa Renee |
title |
Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes |
title_short |
Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes |
title_full |
Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes |
title_fullStr |
Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes |
title_full_unstemmed |
Microbial dynamics in the Arctic Chukchi Sea : differences in microbial abundance and bacterial community composition in high and low production regimes |
title_sort |
microbial dynamics in the arctic chukchi sea : differences in microbial abundance and bacterial community composition in high and low production regimes |
publisher |
uga |
publishDate |
2002 |
url |
http://hdl.handle.net/10724/29196 http://purl.galileo.usg.edu/uga_etd/hodges_lisa_r_200208_ms |
geographic |
Arctic Arctic Ocean Chukchi Sea |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea |
genre |
Arctic Arctic Ocean Chukchi Chukchi Sea |
genre_facet |
Arctic Arctic Ocean Chukchi Chukchi Sea |
op_relation |
hodges_lisa_r_200208_ms http://purl.galileo.usg.edu/uga_etd/hodges_lisa_r_200208_ms http://hdl.handle.net/10724/29196 |
op_rights |
public |
_version_ |
1766322784955269120 |