Hydrochemistry measurements and diazotroph abundances
Microbial dinitrogen (N2) fixation, the nitrogenase enzyme-catalysed reduction of N2 gas into biologically available ammonia, is the main source of new nitrogen (N) in the ocean. For more than 50 years, oceanic N2 fixation has mainly been attributed to the activity of the colonial cyanobacterium Tri...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.865487 2024-09-15T17:44:16+00:00 Hydrochemistry measurements and diazotroph abundances Martínez-Pérez, Clara Mohr, Wiebke Löscher, Carolin R Dekaezemacker, Julien Littmann, Sten Yilmaz, Pelin Lehnen, Christina Fuchs, Bernhard M Lavik, Gaute Schmitz, Ruth A LaRoche, Julie Kuypers, Marcel MM MEDIAN LATITUDE: 13.249329 * MEDIAN LONGITUDE: -47.761082 * SOUTH-BOUND LATITUDE: 11.333330 * WEST-BOUND LONGITUDE: -60.299660 * NORTH-BOUND LATITUDE: 14.500660 * EAST-BOUND LONGITUDE: -21.501000 * DATE/TIME START: 2013-05-02T03:08:00 * DATE/TIME END: 2015-05-01T00:00:00 2016 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.865487 https://doi.org/10.1594/PANGAEA.865487 en eng PANGAEA Supplementary information to: The small unicellular diazotrophic symbiont, UCYN-A, is a key player in the marine nitrogen cycle (URI: https://store.pangaea.de/Publications/Martinez-Perez_etal_2016/Supplementary_information.zip) (Supplementary_information.zip) https://doi.pangaea.de/10.1594/PANGAEA.865487 https://doi.org/10.1594/PANGAEA.865487 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Martínez-Pérez, Clara; Mohr, Wiebke; Löscher, Carolin R; Dekaezemacker, Julien; Littmann, Sten; Yilmaz, Pelin; Lehnen, Christina; Fuchs, Bernhard M; Lavik, Gaute; Schmitz, Ruth A; LaRoche, Julie; Kuypers, Marcel MM (2016): The small unicellular diazotrophic symbiont, UCYN-A, is a key player in the marine nitrogen cycle. Nature Microbiology, 1, 16163, https://doi.org/10.1038/nmicrobiol.2016.163 Center for Marine Environmental Sciences Climate - Biogeochemistry Interactions in the Tropical Ocean MARUM SFB754 dataset publication series 2016 ftpangaea https://doi.org/10.1594/PANGAEA.86548710.1038/nmicrobiol.2016.163 2024-07-24T02:31:21Z Microbial dinitrogen (N2) fixation, the nitrogenase enzyme-catalysed reduction of N2 gas into biologically available ammonia, is the main source of new nitrogen (N) in the ocean. For more than 50 years, oceanic N2 fixation has mainly been attributed to the activity of the colonial cyanobacterium Trichodesmium. Other smaller N2-fixing microorganisms (diazotrophs)--in particular the unicellular cyanobacteria group A (UCYN-A)--are, however, abundant enough to potentially contribute significantly to N2 fixation in the surface waters of the oceans. Despite their abundance, the contribution of UCYN-A to oceanic N2 fixation has so far not been directly quantified. Here, we show that in one of the main areas of oceanic N2 fixation, the tropical North Atlantic7, the symbiotic cyanobacterium UCYN-A contributed to N2 fixation similarly to Trichodesmium. Two types of UCYN-A, UCYN-A1 and -A2, were observed to live in symbioses with specific eukaryotic algae. Single-cell analyses showed that both algae-UCYN-A symbioses actively fixed N2, contributing ~20% to N2 fixation in the tropical North Atlantic, revealing their significance in this region. These symbioses had growth rates five to ten times higher than Trichodesmium, implying a rapid transfer of UCYN-A-fixed N into the food web that might significantly raise their actual contribution to N2 fixation. Our analysis of global 16S rRNA gene databases showed that UCYN-A occurs in surface waters from the Arctic to the Antarctic Circle and thus probably contributes to N2 fixation in a much larger oceanic area than previously thought. Based on their high rates of N2 fixation and cosmopolitan distribution, we hypothesize that UCYN-A plays a major, but currently overlooked role in the oceanic N cycle. Other/Unknown Material Antarc* Antarctic North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-60.299660,-21.501000,14.500660,11.333330) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Center for Marine Environmental Sciences Climate - Biogeochemistry Interactions in the Tropical Ocean MARUM SFB754 |
spellingShingle |
Center for Marine Environmental Sciences Climate - Biogeochemistry Interactions in the Tropical Ocean MARUM SFB754 Martínez-Pérez, Clara Mohr, Wiebke Löscher, Carolin R Dekaezemacker, Julien Littmann, Sten Yilmaz, Pelin Lehnen, Christina Fuchs, Bernhard M Lavik, Gaute Schmitz, Ruth A LaRoche, Julie Kuypers, Marcel MM Hydrochemistry measurements and diazotroph abundances |
topic_facet |
Center for Marine Environmental Sciences Climate - Biogeochemistry Interactions in the Tropical Ocean MARUM SFB754 |
description |
Microbial dinitrogen (N2) fixation, the nitrogenase enzyme-catalysed reduction of N2 gas into biologically available ammonia, is the main source of new nitrogen (N) in the ocean. For more than 50 years, oceanic N2 fixation has mainly been attributed to the activity of the colonial cyanobacterium Trichodesmium. Other smaller N2-fixing microorganisms (diazotrophs)--in particular the unicellular cyanobacteria group A (UCYN-A)--are, however, abundant enough to potentially contribute significantly to N2 fixation in the surface waters of the oceans. Despite their abundance, the contribution of UCYN-A to oceanic N2 fixation has so far not been directly quantified. Here, we show that in one of the main areas of oceanic N2 fixation, the tropical North Atlantic7, the symbiotic cyanobacterium UCYN-A contributed to N2 fixation similarly to Trichodesmium. Two types of UCYN-A, UCYN-A1 and -A2, were observed to live in symbioses with specific eukaryotic algae. Single-cell analyses showed that both algae-UCYN-A symbioses actively fixed N2, contributing ~20% to N2 fixation in the tropical North Atlantic, revealing their significance in this region. These symbioses had growth rates five to ten times higher than Trichodesmium, implying a rapid transfer of UCYN-A-fixed N into the food web that might significantly raise their actual contribution to N2 fixation. Our analysis of global 16S rRNA gene databases showed that UCYN-A occurs in surface waters from the Arctic to the Antarctic Circle and thus probably contributes to N2 fixation in a much larger oceanic area than previously thought. Based on their high rates of N2 fixation and cosmopolitan distribution, we hypothesize that UCYN-A plays a major, but currently overlooked role in the oceanic N cycle. |
format |
Other/Unknown Material |
author |
Martínez-Pérez, Clara Mohr, Wiebke Löscher, Carolin R Dekaezemacker, Julien Littmann, Sten Yilmaz, Pelin Lehnen, Christina Fuchs, Bernhard M Lavik, Gaute Schmitz, Ruth A LaRoche, Julie Kuypers, Marcel MM |
author_facet |
Martínez-Pérez, Clara Mohr, Wiebke Löscher, Carolin R Dekaezemacker, Julien Littmann, Sten Yilmaz, Pelin Lehnen, Christina Fuchs, Bernhard M Lavik, Gaute Schmitz, Ruth A LaRoche, Julie Kuypers, Marcel MM |
author_sort |
Martínez-Pérez, Clara |
title |
Hydrochemistry measurements and diazotroph abundances |
title_short |
Hydrochemistry measurements and diazotroph abundances |
title_full |
Hydrochemistry measurements and diazotroph abundances |
title_fullStr |
Hydrochemistry measurements and diazotroph abundances |
title_full_unstemmed |
Hydrochemistry measurements and diazotroph abundances |
title_sort |
hydrochemistry measurements and diazotroph abundances |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.865487 https://doi.org/10.1594/PANGAEA.865487 |
op_coverage |
MEDIAN LATITUDE: 13.249329 * MEDIAN LONGITUDE: -47.761082 * SOUTH-BOUND LATITUDE: 11.333330 * WEST-BOUND LONGITUDE: -60.299660 * NORTH-BOUND LATITUDE: 14.500660 * EAST-BOUND LONGITUDE: -21.501000 * DATE/TIME START: 2013-05-02T03:08:00 * DATE/TIME END: 2015-05-01T00:00:00 |
long_lat |
ENVELOPE(-60.299660,-21.501000,14.500660,11.333330) |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_source |
Supplement to: Martínez-Pérez, Clara; Mohr, Wiebke; Löscher, Carolin R; Dekaezemacker, Julien; Littmann, Sten; Yilmaz, Pelin; Lehnen, Christina; Fuchs, Bernhard M; Lavik, Gaute; Schmitz, Ruth A; LaRoche, Julie; Kuypers, Marcel MM (2016): The small unicellular diazotrophic symbiont, UCYN-A, is a key player in the marine nitrogen cycle. Nature Microbiology, 1, 16163, https://doi.org/10.1038/nmicrobiol.2016.163 |
op_relation |
Supplementary information to: The small unicellular diazotrophic symbiont, UCYN-A, is a key player in the marine nitrogen cycle (URI: https://store.pangaea.de/Publications/Martinez-Perez_etal_2016/Supplementary_information.zip) (Supplementary_information.zip) https://doi.pangaea.de/10.1594/PANGAEA.865487 https://doi.org/10.1594/PANGAEA.865487 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.86548710.1038/nmicrobiol.2016.163 |
_version_ |
1810491696260055040 |