Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean
The relationship between surface-derived particulate organic matter (POM) and deep-sea sediment bacterial abundance, community structure and composition was investigated in two different sediment layers from two zones of contrasting surface water productivity in the southern Indian Ocean. Bacterial...
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:21214 2023-05-15T15:59:33+02:00 Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean Jamieson, Rachel Heywood, Jane Rogers, Alex Billett, David Pearce, David 2013-05 https://nrl.northumbria.ac.uk/id/eprint/21214/ https://doi.org/10.1016/j.dsr.2012.12.012 unknown Elsevier Jamieson, Rachel, Heywood, Jane, Rogers, Alex, Billett, David and Pearce, David (2013) Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 75. pp. 67-77. ISSN 0967 0637 C500 Microbiology F700 Ocean Sciences Article PeerReviewed 2013 ftunivnorthumb https://doi.org/10.1016/j.dsr.2012.12.012 2022-09-25T06:01:08Z The relationship between surface-derived particulate organic matter (POM) and deep-sea sediment bacterial abundance, community structure and composition was investigated in two different sediment layers from two zones of contrasting surface water productivity in the southern Indian Ocean. Bacterial sediment communities from high chlorophyll (HC) and low chlorophyll (LC) sites were characterized and compared using direct counts, clone library construction, denaturing gradient gel electrophoresis (DGGE) and fluorescence in situ hybridization (FISH). Of the 1566 bacterial clones generated from the sediment communities, 1010 matched published 16S rDNA sequences at ≥97% identity. A comparison of surface sediment clone libraries showed that at least one third of all identified operational taxonomic units (OTUs) were common to both HC and LC sites. DGGE community profiles were consistent (82% similar) and evenness of the major phylogenetic groups was 96% similar between surface sediment communities, where gamma- and alpha-Proteobacteria were dominant. Sediment communities shared similarly high biodiversity, while species richness was marginally higher at the LC site. Intra-site shifts in bacterial abundance and composition were observed with increasing sediment depth. Despite the differences in organic matter input between sites, the consistency observed between HC and LC sediment communities pointed to (1) the extent of remineralisation by mega and meio-fauna as a potential factor affecting the quantity and quality of POM available to sediment bacteria, (2) sampling during the early ‘nutrient assimilation phase’ of the bacterial response to freshly deposited POM or (3) that the action of bacteria in the water column could affect the quantity and quality of POM available to sediment bacteria. Although factors other than these may explain the observed similarities, this first comparison of such deep-sea sediment communities in relation to surface-derived productivity may be useful in further elucidating the role of ... Article in Journal/Newspaper Crozet Islands Southern Ocean Northumbria University, Newcastle: Northumbria Research Link (NRL) Indian Southern Ocean Deep Sea Research Part I: Oceanographic Research Papers 75 67 77 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
unknown |
topic |
C500 Microbiology F700 Ocean Sciences |
spellingShingle |
C500 Microbiology F700 Ocean Sciences Jamieson, Rachel Heywood, Jane Rogers, Alex Billett, David Pearce, David Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean |
topic_facet |
C500 Microbiology F700 Ocean Sciences |
description |
The relationship between surface-derived particulate organic matter (POM) and deep-sea sediment bacterial abundance, community structure and composition was investigated in two different sediment layers from two zones of contrasting surface water productivity in the southern Indian Ocean. Bacterial sediment communities from high chlorophyll (HC) and low chlorophyll (LC) sites were characterized and compared using direct counts, clone library construction, denaturing gradient gel electrophoresis (DGGE) and fluorescence in situ hybridization (FISH). Of the 1566 bacterial clones generated from the sediment communities, 1010 matched published 16S rDNA sequences at ≥97% identity. A comparison of surface sediment clone libraries showed that at least one third of all identified operational taxonomic units (OTUs) were common to both HC and LC sites. DGGE community profiles were consistent (82% similar) and evenness of the major phylogenetic groups was 96% similar between surface sediment communities, where gamma- and alpha-Proteobacteria were dominant. Sediment communities shared similarly high biodiversity, while species richness was marginally higher at the LC site. Intra-site shifts in bacterial abundance and composition were observed with increasing sediment depth. Despite the differences in organic matter input between sites, the consistency observed between HC and LC sediment communities pointed to (1) the extent of remineralisation by mega and meio-fauna as a potential factor affecting the quantity and quality of POM available to sediment bacteria, (2) sampling during the early ‘nutrient assimilation phase’ of the bacterial response to freshly deposited POM or (3) that the action of bacteria in the water column could affect the quantity and quality of POM available to sediment bacteria. Although factors other than these may explain the observed similarities, this first comparison of such deep-sea sediment communities in relation to surface-derived productivity may be useful in further elucidating the role of ... |
format |
Article in Journal/Newspaper |
author |
Jamieson, Rachel Heywood, Jane Rogers, Alex Billett, David Pearce, David |
author_facet |
Jamieson, Rachel Heywood, Jane Rogers, Alex Billett, David Pearce, David |
author_sort |
Jamieson, Rachel |
title |
Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean |
title_short |
Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean |
title_full |
Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean |
title_fullStr |
Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean |
title_full_unstemmed |
Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean |
title_sort |
bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the crozet islands, southern ocean |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://nrl.northumbria.ac.uk/id/eprint/21214/ https://doi.org/10.1016/j.dsr.2012.12.012 |
geographic |
Indian Southern Ocean |
geographic_facet |
Indian Southern Ocean |
genre |
Crozet Islands Southern Ocean |
genre_facet |
Crozet Islands Southern Ocean |
op_relation |
Jamieson, Rachel, Heywood, Jane, Rogers, Alex, Billett, David and Pearce, David (2013) Bacterial biodiversity in deep-sea sediments from two regions of contrasting surface water productivity near the Crozet Islands, Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 75. pp. 67-77. ISSN 0967 0637 |
op_doi |
https://doi.org/10.1016/j.dsr.2012.12.012 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
75 |
container_start_page |
67 |
op_container_end_page |
77 |
_version_ |
1766395499152146432 |