Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters

The Pacific Ocean constitutes about half of the global oceans and thus microbial processes in this ocean have a large impact on global elemental cycles. Despite several intensely studied regions large areas are still greatly understudied regarding microbial activities, organic matter cycling and bio...

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Published in:Frontiers in Marine Science
Main Authors: Helge-Ansgar Giebel, Carol Arnosti, Thomas H. Badewien, Insa Bakenhus, John Paul Balmonte, Sara Billerbeck, Leon Dlugosch, Rohan Henkel, Birgit Kuerzel, Jens Meyerjürgens, Felix Milke, Daniela Voss, Gerrit Wienhausen, Matthias Wietz, Holger Winkler, Mathias Wolterink, Meinhard Simon
Format: Article in Journal/Newspaper
Language:English
Published: Frontiers Media S.A. 2021
Subjects:
Q
Online Access:https://doi.org/10.3389/fmars.2021.764383
https://doaj.org/article/cc30d7fd0a504ea89611740ef30450cc
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spelling ftdoajarticles:oai:doaj.org/article:cc30d7fd0a504ea89611740ef30450cc 2023-05-15T18:28:19+02:00 Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters Helge-Ansgar Giebel Carol Arnosti Thomas H. Badewien Insa Bakenhus John Paul Balmonte Sara Billerbeck Leon Dlugosch Rohan Henkel Birgit Kuerzel Jens Meyerjürgens Felix Milke Daniela Voss Gerrit Wienhausen Matthias Wietz Holger Winkler Mathias Wolterink Meinhard Simon 2021-12-01T00:00:00Z https://doi.org/10.3389/fmars.2021.764383 https://doaj.org/article/cc30d7fd0a504ea89611740ef30450cc EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2021.764383/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.764383 https://doaj.org/article/cc30d7fd0a504ea89611740ef30450cc Frontiers in Marine Science, Vol 8 (2021) Pacific Ocean biogeography chlorophyll bacteria growth rates labile substrates Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2021 ftdoajarticles https://doi.org/10.3389/fmars.2021.764383 2022-12-31T15:38:11Z The Pacific Ocean constitutes about half of the global oceans and thus microbial processes in this ocean have a large impact on global elemental cycles. Despite several intensely studied regions large areas are still greatly understudied regarding microbial activities, organic matter cycling and biogeography. Refined information about these features is most important to better understand the significance of this ocean for global biogeochemical and elemental cycles. Therefore we investigated a suite of microbial and geochemical variables along a transect from the subantarctic to the subarctic Pacific in the upper 200 m of the water column. The aim was to quantify rates of organic matter processing, identify potential controlling factors and prokaryotic key players. The assessed variables included abundance of heterotrophic prokaryotes and cyanobacteria, heterotrophic prokaryotic production (HPP), turnover rate constants of amino acids, glucose, and acetate, leucine aminopeptidase and β-glucosidase activities, and the composition of the bacterial community by fluorescence in situ hybridization (FISH). The additional quantification of nitrate, dissolved amino acids and carbohydrates, chlorophyll a, particulate organic carbon and nitrogen (POC, PON) provided a rich environmental context. The oligotrophic gyres exhibited the lowest prokaryotic abundances, rates of HPP and substrate turnover. Low nucleic acid prokaryotes dominated in these gyres, whereas in temperate and subpolar regions further north and south, high nucleic acid prokaryotes dominated. Turnover rate constants of glucose and acetate, as well as leucine aminopeptidase activity, increased from (sub)tropical toward the subpolar regions. In contrast, HPP and bulk growth rates were highest near the equatorial upwelling and lowest in the central gyres and subpolar regions. The SAR11 clade, the Roseobacter group and Flavobacteria constituted the majority of the prokaryotic communities. Vertical profiles of the biogeochemical and microbial variables markedly ... Article in Journal/Newspaper Subarctic Directory of Open Access Journals: DOAJ Articles Pacific Frontiers in Marine Science 8
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic Pacific Ocean
biogeography
chlorophyll
bacteria
growth rates
labile substrates
Science
Q
General. Including nature conservation
geographical distribution
QH1-199.5
spellingShingle Pacific Ocean
biogeography
chlorophyll
bacteria
growth rates
labile substrates
Science
Q
General. Including nature conservation
geographical distribution
QH1-199.5
Helge-Ansgar Giebel
Carol Arnosti
Thomas H. Badewien
Insa Bakenhus
John Paul Balmonte
Sara Billerbeck
Leon Dlugosch
Rohan Henkel
Birgit Kuerzel
Jens Meyerjürgens
Felix Milke
Daniela Voss
Gerrit Wienhausen
Matthias Wietz
Holger Winkler
Mathias Wolterink
Meinhard Simon
Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters
topic_facet Pacific Ocean
biogeography
chlorophyll
bacteria
growth rates
labile substrates
Science
Q
General. Including nature conservation
geographical distribution
QH1-199.5
description The Pacific Ocean constitutes about half of the global oceans and thus microbial processes in this ocean have a large impact on global elemental cycles. Despite several intensely studied regions large areas are still greatly understudied regarding microbial activities, organic matter cycling and biogeography. Refined information about these features is most important to better understand the significance of this ocean for global biogeochemical and elemental cycles. Therefore we investigated a suite of microbial and geochemical variables along a transect from the subantarctic to the subarctic Pacific in the upper 200 m of the water column. The aim was to quantify rates of organic matter processing, identify potential controlling factors and prokaryotic key players. The assessed variables included abundance of heterotrophic prokaryotes and cyanobacteria, heterotrophic prokaryotic production (HPP), turnover rate constants of amino acids, glucose, and acetate, leucine aminopeptidase and β-glucosidase activities, and the composition of the bacterial community by fluorescence in situ hybridization (FISH). The additional quantification of nitrate, dissolved amino acids and carbohydrates, chlorophyll a, particulate organic carbon and nitrogen (POC, PON) provided a rich environmental context. The oligotrophic gyres exhibited the lowest prokaryotic abundances, rates of HPP and substrate turnover. Low nucleic acid prokaryotes dominated in these gyres, whereas in temperate and subpolar regions further north and south, high nucleic acid prokaryotes dominated. Turnover rate constants of glucose and acetate, as well as leucine aminopeptidase activity, increased from (sub)tropical toward the subpolar regions. In contrast, HPP and bulk growth rates were highest near the equatorial upwelling and lowest in the central gyres and subpolar regions. The SAR11 clade, the Roseobacter group and Flavobacteria constituted the majority of the prokaryotic communities. Vertical profiles of the biogeochemical and microbial variables markedly ...
format Article in Journal/Newspaper
author Helge-Ansgar Giebel
Carol Arnosti
Thomas H. Badewien
Insa Bakenhus
John Paul Balmonte
Sara Billerbeck
Leon Dlugosch
Rohan Henkel
Birgit Kuerzel
Jens Meyerjürgens
Felix Milke
Daniela Voss
Gerrit Wienhausen
Matthias Wietz
Holger Winkler
Mathias Wolterink
Meinhard Simon
author_facet Helge-Ansgar Giebel
Carol Arnosti
Thomas H. Badewien
Insa Bakenhus
John Paul Balmonte
Sara Billerbeck
Leon Dlugosch
Rohan Henkel
Birgit Kuerzel
Jens Meyerjürgens
Felix Milke
Daniela Voss
Gerrit Wienhausen
Matthias Wietz
Holger Winkler
Mathias Wolterink
Meinhard Simon
author_sort Helge-Ansgar Giebel
title Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters
title_short Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters
title_full Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters
title_fullStr Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters
title_full_unstemmed Microbial Growth and Organic Matter Cycling in the Pacific Ocean Along a Latitudinal Transect Between Subarctic and Subantarctic Waters
title_sort microbial growth and organic matter cycling in the pacific ocean along a latitudinal transect between subarctic and subantarctic waters
publisher Frontiers Media S.A.
publishDate 2021
url https://doi.org/10.3389/fmars.2021.764383
https://doaj.org/article/cc30d7fd0a504ea89611740ef30450cc
geographic Pacific
geographic_facet Pacific
genre Subarctic
genre_facet Subarctic
op_source Frontiers in Marine Science, Vol 8 (2021)
op_relation https://www.frontiersin.org/articles/10.3389/fmars.2021.764383/full
https://doaj.org/toc/2296-7745
2296-7745
doi:10.3389/fmars.2021.764383
https://doaj.org/article/cc30d7fd0a504ea89611740ef30450cc
op_doi https://doi.org/10.3389/fmars.2021.764383
container_title Frontiers in Marine Science
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