The mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity
14th International Symposium on Microbial Ecology (ISME14), 19-24 August 2012 Copenhagen, Denmark The deep ocean constitutes the largest habitat in the biosphere yet it is still unexplored in its majority. Based on low temperatures and substrate availability, a postulated large decrease in all biolo...
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ftcsic:oai:digital.csic.es:10261/93424 2024-02-11T10:06:34+01:00 The mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity Gomes, Ana Morán, Xosé Anxelu G. Gasol, Josep M. 2012-08-20 http://hdl.handle.net/10261/93424 unknown http://www.isme-microbes.org/isme14/report ISME14 - Abstracts Posters (2012) http://hdl.handle.net/10261/93424 none póster de congreso http://purl.org/coar/resource_type/c_6670 2012 ftcsic 2024-01-16T09:57:11Z 14th International Symposium on Microbial Ecology (ISME14), 19-24 August 2012 Copenhagen, Denmark The deep ocean constitutes the largest habitat in the biosphere yet it is still unexplored in its majority. Based on low temperatures and substrate availability, a postulated large decrease in all biological processes with depth pictures a deep oceanic realm with almost negligible activity. Recently, this assumption of a 'dead' deep-sea has become questioned by increasing data that show deep-ocean bacteria and archaea to be growing at rather high rates. Open ocean samples were collected during the worldaround Malaspina Expedition in 2010-2011 from the sunlit epipelagic waters to the dark bathypelagic zone, covering the major oceanic basins of the global ocean including the North and South Atlantic, the Pacific and the Indian Ocean. Preliminary results indicate higher total abundances of heterotrophic prokaryotes (Bacteria and Archaea) in deep North Atlantic waters (4 × 105 cells mL-1) as compared to the other basins (8 × 103 cells mL-1 in the South Atlantic and 3 × 104 cells mL-1 in the Indian and Pacific Oceans). Despite these basin-scale differences, a common >1 order of magnitude decrease in abundance from the photic zone to the dark ocean was observed. We also measured single cell and bulk activities which point to significant activity levels in deep waters of all the major basins. Using archaeal inhibitors of bacterial activity, we show that Archaea contribute to approximately 40% of total heterotrophic prokaryotic production in the deep oceanic waters Peer Reviewed Still Image North Atlantic Digital.CSIC (Spanish National Research Council) Indian Pacific |
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Digital.CSIC (Spanish National Research Council) |
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ftcsic |
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14th International Symposium on Microbial Ecology (ISME14), 19-24 August 2012 Copenhagen, Denmark The deep ocean constitutes the largest habitat in the biosphere yet it is still unexplored in its majority. Based on low temperatures and substrate availability, a postulated large decrease in all biological processes with depth pictures a deep oceanic realm with almost negligible activity. Recently, this assumption of a 'dead' deep-sea has become questioned by increasing data that show deep-ocean bacteria and archaea to be growing at rather high rates. Open ocean samples were collected during the worldaround Malaspina Expedition in 2010-2011 from the sunlit epipelagic waters to the dark bathypelagic zone, covering the major oceanic basins of the global ocean including the North and South Atlantic, the Pacific and the Indian Ocean. Preliminary results indicate higher total abundances of heterotrophic prokaryotes (Bacteria and Archaea) in deep North Atlantic waters (4 × 105 cells mL-1) as compared to the other basins (8 × 103 cells mL-1 in the South Atlantic and 3 × 104 cells mL-1 in the Indian and Pacific Oceans). Despite these basin-scale differences, a common >1 order of magnitude decrease in abundance from the photic zone to the dark ocean was observed. We also measured single cell and bulk activities which point to significant activity levels in deep waters of all the major basins. Using archaeal inhibitors of bacterial activity, we show that Archaea contribute to approximately 40% of total heterotrophic prokaryotic production in the deep oceanic waters Peer Reviewed |
format |
Still Image |
author |
Gomes, Ana Morán, Xosé Anxelu G. Gasol, Josep M. |
spellingShingle |
Gomes, Ana Morán, Xosé Anxelu G. Gasol, Josep M. The mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity |
author_facet |
Gomes, Ana Morán, Xosé Anxelu G. Gasol, Josep M. |
author_sort |
Gomes, Ana |
title |
The mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity |
title_short |
The mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity |
title_full |
The mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity |
title_fullStr |
The mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity |
title_full_unstemmed |
The mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity |
title_sort |
mystery of the unknown: patterns in the global deep ocean heterotrophic bacterioplankton activity |
publishDate |
2012 |
url |
http://hdl.handle.net/10261/93424 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://www.isme-microbes.org/isme14/report ISME14 - Abstracts Posters (2012) http://hdl.handle.net/10261/93424 |
op_rights |
none |
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1790604366854488064 |