Distribution Patterns of Iron-Oxidizing Zeta- and Beta-Proteobacteria From Different Environmental Settings at the Jan Mayen Vent Fields

Iron oxidizers are widespread in marine environments and play an important role in marine iron cycling. However, little is known about the overall distribution of iron oxidizers within hydrothermal systems, including settings with little hydrothermal activity. Moreover, the extent to which different...

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Main Authors: Jan Vander Roost, Frida Lise Daae, Ida Helene Steen, Ingunn Hindeness Thorseth, Håkon Dahle
Format: Article
Language:English
Published: Frontiers Media S.A. 2018-12-01
Series:Frontiers in Microbiology
Subjects:
Online Access:https://www.frontiersin.org/article/10.3389/fmicb.2018.03008/full
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spelling doaj-0034bfef0e904eeeae40b3935bcdf8ff2020-11-24T20:57:12ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2018-12-01910.3389/fmicb.2018.03008424539Distribution Patterns of Iron-Oxidizing Zeta- and Beta-Proteobacteria From Different Environmental Settings at the Jan Mayen Vent FieldsJan Vander Roost0Jan Vander Roost1Frida Lise Daae2Frida Lise Daae3Ida Helene Steen4Ida Helene Steen5Ingunn Hindeness Thorseth6Ingunn Hindeness Thorseth7Håkon Dahle8Håkon Dahle9Centre for Geobiology, University of Bergen, Bergen, NorwayDepartment of Biology, University of Bergen, Bergen, NorwayCentre for Geobiology, University of Bergen, Bergen, NorwayDepartment of Biology, University of Bergen, Bergen, NorwayCentre for Geobiology, University of Bergen, Bergen, NorwayDepartment of Biology, University of Bergen, Bergen, NorwayCentre for Geobiology, University of Bergen, Bergen, NorwayDepartment of Earth Science, University of Bergen, Bergen, NorwayCentre for Geobiology, University of Bergen, Bergen, NorwayDepartment of Biology, University of Bergen, Bergen, NorwayIron oxidizers are widespread in marine environments and play an important role in marine iron cycling. However, little is known about the overall distribution of iron oxidizers within hydrothermal systems, including settings with little hydrothermal activity. Moreover, the extent to which different phylogenetic groups of iron oxidizers exhibit niche specialization toward different environmental settings, remains largely unknown. Obtaining such knowledge is critical to unraveling the impact of the activity of iron oxidizers and how they are adapted. Here, we used 16S rRNA sequencing to characterize the distribution of iron oxidizers in different environmental settings within the Jan Mayen hydrothermal vent fields (JMVFs). Putative iron oxidizers affiliated to Zetaproteobacteria and Betaproteobacteria were detected within iron mounds, bottom seawater, basalt surfaces, and surface layers of sediments. The detected iron oxidizers were compared to sequence types previously observed in patchily distributed iron mats associated with diffuse venting at the JMVFs. Most OTUs of iron oxidizers reoccurred under different environmental settings, suggesting a limited degree of niche specialization. Consequently, most of the detected iron oxidizers seem to be generalists with a large habitat range. Our study highlights the importance of gathering information about the overall distribution of iron oxidizers in hydrothermal systems to fully understand the role of this metabolic group regarding cycling of iron. Furthermore, our results provide further evidence of the presence of iron-oxidizing members of Betaproteobacteria in marine environments.https://www.frontiersin.org/article/10.3389/fmicb.2018.03008/fulliron oxidizersZetaproteobacteriaBetaproteobacteriamicrobial ecologyhydrothermal systems
collection DOAJ
language English
format Article
sources DOAJ
author Jan Vander Roost
Jan Vander Roost
Frida Lise Daae
Frida Lise Daae
Ida Helene Steen
Ida Helene Steen
Ingunn Hindeness Thorseth
Ingunn Hindeness Thorseth
Håkon Dahle
Håkon Dahle
spellingShingle Jan Vander Roost
Jan Vander Roost
Frida Lise Daae
Frida Lise Daae
Ida Helene Steen
Ida Helene Steen
Ingunn Hindeness Thorseth
Ingunn Hindeness Thorseth
Håkon Dahle
Håkon Dahle
Distribution Patterns of Iron-Oxidizing Zeta- and Beta-Proteobacteria From Different Environmental Settings at the Jan Mayen Vent Fields
Frontiers in Microbiology
iron oxidizers
Zetaproteobacteria
Betaproteobacteria
microbial ecology
hydrothermal systems
author_facet Jan Vander Roost
Jan Vander Roost
Frida Lise Daae
Frida Lise Daae
Ida Helene Steen
Ida Helene Steen
Ingunn Hindeness Thorseth
Ingunn Hindeness Thorseth
Håkon Dahle
Håkon Dahle
author_sort Jan Vander Roost
title Distribution Patterns of Iron-Oxidizing Zeta- and Beta-Proteobacteria From Different Environmental Settings at the Jan Mayen Vent Fields
title_short Distribution Patterns of Iron-Oxidizing Zeta- and Beta-Proteobacteria From Different Environmental Settings at the Jan Mayen Vent Fields
title_full Distribution Patterns of Iron-Oxidizing Zeta- and Beta-Proteobacteria From Different Environmental Settings at the Jan Mayen Vent Fields
title_fullStr Distribution Patterns of Iron-Oxidizing Zeta- and Beta-Proteobacteria From Different Environmental Settings at the Jan Mayen Vent Fields
title_full_unstemmed Distribution Patterns of Iron-Oxidizing Zeta- and Beta-Proteobacteria From Different Environmental Settings at the Jan Mayen Vent Fields
title_sort distribution patterns of iron-oxidizing zeta- and beta-proteobacteria from different environmental settings at the jan mayen vent fields
publisher Frontiers Media S.A.
series Frontiers in Microbiology
issn 1664-302X
publishDate 2018-12-01
description Iron oxidizers are widespread in marine environments and play an important role in marine iron cycling. However, little is known about the overall distribution of iron oxidizers within hydrothermal systems, including settings with little hydrothermal activity. Moreover, the extent to which different phylogenetic groups of iron oxidizers exhibit niche specialization toward different environmental settings, remains largely unknown. Obtaining such knowledge is critical to unraveling the impact of the activity of iron oxidizers and how they are adapted. Here, we used 16S rRNA sequencing to characterize the distribution of iron oxidizers in different environmental settings within the Jan Mayen hydrothermal vent fields (JMVFs). Putative iron oxidizers affiliated to Zetaproteobacteria and Betaproteobacteria were detected within iron mounds, bottom seawater, basalt surfaces, and surface layers of sediments. The detected iron oxidizers were compared to sequence types previously observed in patchily distributed iron mats associated with diffuse venting at the JMVFs. Most OTUs of iron oxidizers reoccurred under different environmental settings, suggesting a limited degree of niche specialization. Consequently, most of the detected iron oxidizers seem to be generalists with a large habitat range. Our study highlights the importance of gathering information about the overall distribution of iron oxidizers in hydrothermal systems to fully understand the role of this metabolic group regarding cycling of iron. Furthermore, our results provide further evidence of the presence of iron-oxidizing members of Betaproteobacteria in marine environments.
topic iron oxidizers
Zetaproteobacteria
Betaproteobacteria
microbial ecology
hydrothermal systems
url https://www.frontiersin.org/article/10.3389/fmicb.2018.03008/full
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