Drivers of pelagic and benthic microbial communities on Central Arctic seamounts
Seamounts are abundant features on the seafloor that serve as hotspots and barriers for the dispersal of benthic organisms. The primary focus of seamount ecology has typically been on the composition and distribution of faunal communities, with far less attention given to microbial communities. Here...
Published in: | Frontiers in Marine Science |
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Language: | English |
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Online Access: | https://oceanrep.geomar.de/id/eprint/59492/ https://oceanrep.geomar.de/id/eprint/59492/1/fmars-10-1216442.pdf https://oceanrep.geomar.de/id/eprint/59492/2/Data%20Sheet%201-1.docx https://doi.org/10.3389/fmars.2023.1216442 |
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ftoceanrep:oai:oceanrep.geomar.de:59492 2024-02-11T09:59:38+01:00 Drivers of pelagic and benthic microbial communities on Central Arctic seamounts von Jackowski, Anabel Walter, Maren Spiegel, Timo Buttigieg, Pier Luigi Molari, Massimiliano 2023-10-31 text https://oceanrep.geomar.de/id/eprint/59492/ https://oceanrep.geomar.de/id/eprint/59492/1/fmars-10-1216442.pdf https://oceanrep.geomar.de/id/eprint/59492/2/Data%20Sheet%201-1.docx https://doi.org/10.3389/fmars.2023.1216442 en eng Frontiers https://oceanrep.geomar.de/id/eprint/59492/1/fmars-10-1216442.pdf https://oceanrep.geomar.de/id/eprint/59492/2/Data%20Sheet%201-1.docx von Jackowski, A., Walter, M., Spiegel, T. , Buttigieg, P. L. and Molari, M. (2023) Drivers of pelagic and benthic microbial communities on Central Arctic seamounts. Open Access Frontiers in Marine Science, 10 . Art.Nr. 1216442. DOI 10.3389/fmars.2023.1216442 <https://doi.org/10.3389/fmars.2023.1216442>. doi:10.3389/fmars.2023.1216442 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2023 ftoceanrep https://doi.org/10.3389/fmars.2023.1216442 2024-01-15T00:28:03Z Seamounts are abundant features on the seafloor that serve as hotspots and barriers for the dispersal of benthic organisms. The primary focus of seamount ecology has typically been on the composition and distribution of faunal communities, with far less attention given to microbial communities. Here, we investigated the microbial communities in the water column (0-3400 m depth) and sediments (619-3883 m depth, 0-16 cm below seafloor) along the ice-covered Arctic ridge system called the Langseth Ridge. We contextualized the microbial community composition with data on the benthic trophic state (i.e., organic matter, chlorophyll- a content, and porewater geochemistry) and substrate type (i.e., sponge mats, sediments, basaltic pebbles). Our results showed slow current velocities throughout the water column, a shift in the pelagic microbial community from a dominance of Bacteroidia in the 0-10 m depth towards Proteobacteria and Nitrososphaeria below the epipelagic zone. In general, the pelagic microbial communities showed a high degree of similarity between the Langseth Ridge seamounts to a northern reference site. The only notable differences were decreases in richness between ~600 m and the bottom waters (~10 m above the seafloor) that suggest a pelagic-benthic coupling mediated by filter feeding of sponges living on the seamount summits. On the seafloor, the sponge spicule mats, and polychaete worms were the principal source of variation in sedimentary biogeochemistry and the benthic microbial community structure. The porewater signature suggested that low organic matter degradation rates are accompanied by a microbial community typical of deep-sea oligotrophic environments, such as Proteobacteria, Acidimicrobiia, Dehalococcoidia, Nitrospira, and archaeal Nitrososphaeria. The combined analysis of biogeochemical parameters and the microbial community suggests that the sponges play a significant role for pelagic-benthic coupling and acted as ecosystem engineers on the seafloor of ice-covered seamounts in the ... Article in Journal/Newspaper Arctic Arctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Langseth ENVELOPE(15.668,15.668,68.338,68.338) Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Seamounts are abundant features on the seafloor that serve as hotspots and barriers for the dispersal of benthic organisms. The primary focus of seamount ecology has typically been on the composition and distribution of faunal communities, with far less attention given to microbial communities. Here, we investigated the microbial communities in the water column (0-3400 m depth) and sediments (619-3883 m depth, 0-16 cm below seafloor) along the ice-covered Arctic ridge system called the Langseth Ridge. We contextualized the microbial community composition with data on the benthic trophic state (i.e., organic matter, chlorophyll- a content, and porewater geochemistry) and substrate type (i.e., sponge mats, sediments, basaltic pebbles). Our results showed slow current velocities throughout the water column, a shift in the pelagic microbial community from a dominance of Bacteroidia in the 0-10 m depth towards Proteobacteria and Nitrososphaeria below the epipelagic zone. In general, the pelagic microbial communities showed a high degree of similarity between the Langseth Ridge seamounts to a northern reference site. The only notable differences were decreases in richness between ~600 m and the bottom waters (~10 m above the seafloor) that suggest a pelagic-benthic coupling mediated by filter feeding of sponges living on the seamount summits. On the seafloor, the sponge spicule mats, and polychaete worms were the principal source of variation in sedimentary biogeochemistry and the benthic microbial community structure. The porewater signature suggested that low organic matter degradation rates are accompanied by a microbial community typical of deep-sea oligotrophic environments, such as Proteobacteria, Acidimicrobiia, Dehalococcoidia, Nitrospira, and archaeal Nitrososphaeria. The combined analysis of biogeochemical parameters and the microbial community suggests that the sponges play a significant role for pelagic-benthic coupling and acted as ecosystem engineers on the seafloor of ice-covered seamounts in the ... |
format |
Article in Journal/Newspaper |
author |
von Jackowski, Anabel Walter, Maren Spiegel, Timo Buttigieg, Pier Luigi Molari, Massimiliano |
spellingShingle |
von Jackowski, Anabel Walter, Maren Spiegel, Timo Buttigieg, Pier Luigi Molari, Massimiliano Drivers of pelagic and benthic microbial communities on Central Arctic seamounts |
author_facet |
von Jackowski, Anabel Walter, Maren Spiegel, Timo Buttigieg, Pier Luigi Molari, Massimiliano |
author_sort |
von Jackowski, Anabel |
title |
Drivers of pelagic and benthic microbial communities on Central Arctic seamounts |
title_short |
Drivers of pelagic and benthic microbial communities on Central Arctic seamounts |
title_full |
Drivers of pelagic and benthic microbial communities on Central Arctic seamounts |
title_fullStr |
Drivers of pelagic and benthic microbial communities on Central Arctic seamounts |
title_full_unstemmed |
Drivers of pelagic and benthic microbial communities on Central Arctic seamounts |
title_sort |
drivers of pelagic and benthic microbial communities on central arctic seamounts |
publisher |
Frontiers |
publishDate |
2023 |
url |
https://oceanrep.geomar.de/id/eprint/59492/ https://oceanrep.geomar.de/id/eprint/59492/1/fmars-10-1216442.pdf https://oceanrep.geomar.de/id/eprint/59492/2/Data%20Sheet%201-1.docx https://doi.org/10.3389/fmars.2023.1216442 |
long_lat |
ENVELOPE(15.668,15.668,68.338,68.338) |
geographic |
Arctic Langseth |
geographic_facet |
Arctic Langseth |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/59492/1/fmars-10-1216442.pdf https://oceanrep.geomar.de/id/eprint/59492/2/Data%20Sheet%201-1.docx von Jackowski, A., Walter, M., Spiegel, T. , Buttigieg, P. L. and Molari, M. (2023) Drivers of pelagic and benthic microbial communities on Central Arctic seamounts. Open Access Frontiers in Marine Science, 10 . Art.Nr. 1216442. DOI 10.3389/fmars.2023.1216442 <https://doi.org/10.3389/fmars.2023.1216442>. doi:10.3389/fmars.2023.1216442 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2023.1216442 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1790595442592972800 |