Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments
Benthic deep-sea communities are largely dependent on particle flux from surface waters. In the Arctic Ocean, environmental changes occur more rapidly than in other ocean regions, and have major effects on the export of organic matter to the deep sea. Because bacteria constitute the majority of deep...
Published in: | Frontiers in Microbiology |
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Online Access: | https://epic.awi.de/id/eprint/44411/ https://epic.awi.de/id/eprint/44411/1/Hoffmann_2017_Response_of_Bacterial_Communities_in_Arctic_Deep-Sea_Sediments.pdf https://doi.org/10.3389/fmicb.2017.00266 https://hdl.handle.net/10013/epic.50752 https://hdl.handle.net/10013/epic.50752.d001 |
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ftawi:oai:epic.awi.de:44411 2024-09-15T17:51:20+00:00 Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments Hoffmann, Katy Hassenrück, Christiane Salman-Carvalho, Verena Holtappels, Moritz Bienhold, Christina 2017-02-24 application/pdf https://epic.awi.de/id/eprint/44411/ https://epic.awi.de/id/eprint/44411/1/Hoffmann_2017_Response_of_Bacterial_Communities_in_Arctic_Deep-Sea_Sediments.pdf https://doi.org/10.3389/fmicb.2017.00266 https://hdl.handle.net/10013/epic.50752 https://hdl.handle.net/10013/epic.50752.d001 unknown https://epic.awi.de/id/eprint/44411/1/Hoffmann_2017_Response_of_Bacterial_Communities_in_Arctic_Deep-Sea_Sediments.pdf https://hdl.handle.net/10013/epic.50752.d001 Hoffmann, K. , Hassenrück, C. , Salman-Carvalho, V. , Holtappels, M. orcid:0000-0003-3682-1903 and Bienhold, C. orcid:0000-0003-2269-9468 (2017) Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments , Frontiers in Microbiology, 8 . doi:10.3389/fmicb.2017.00266 <https://doi.org/10.3389/fmicb.2017.00266> , hdl:10013/epic.50752 EPIC3Frontiers in Microbiology, 8, ISSN: 1664-302X Article isiRev 2017 ftawi https://doi.org/10.3389/fmicb.2017.00266 2024-06-24T04:17:43Z Benthic deep-sea communities are largely dependent on particle flux from surface waters. In the Arctic Ocean, environmental changes occur more rapidly than in other ocean regions, and have major effects on the export of organic matter to the deep sea. Because bacteria constitute the majority of deep-sea benthic biomass and influence global element cycles, it is important to better understand how changes in organic matter input will affect bacterial communities at the Arctic seafloor. In a multidisciplinary ex situ experiment, benthic bacterial deep-sea communities from the Long-Term Ecological Research Observatory HAUSGARTEN were supplemented with different types of habitat-related detritus (chitin, Arctic algae) and incubated for 23 days under in situ conditions. Chitin addition caused strong changes in community activity, while community structure remained similar to unfed control incubations. In contrast, the addition of phytodetritus resulted in strong changes in community composition, accompanied by increased community activity, indicating the need for adaptation in these treatments. High-throughput sequencing of the 16S rRNA gene and 16S rRNA revealed distinct taxonomic groups of potentially fast-growing, opportunistic bacteria in the different detritus treatments. Compared to the unfed control, Colwelliaceae, Psychromonadaceae, and Oceanospirillaceae increased in relative abundance in the chitin treatment, whereas Flavobacteriaceae, Marinilabiaceae, and Pseudoalteromonadaceae increased in the phytodetritus treatments. Hence, these groups may constitute indicator taxa for the different organic matter sources at this study site. In summary, differences in community structure and in the uptake and remineralization of carbon in the different treatments suggest an effect of organic matter quality on bacterial diversity as well as on carbon turnover at the seafloor, an important feedback mechanism to be considered in future climate change scenarios. Article in Journal/Newspaper Arctic Arctic Ocean Climate change Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Frontiers in Microbiology 8 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
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description |
Benthic deep-sea communities are largely dependent on particle flux from surface waters. In the Arctic Ocean, environmental changes occur more rapidly than in other ocean regions, and have major effects on the export of organic matter to the deep sea. Because bacteria constitute the majority of deep-sea benthic biomass and influence global element cycles, it is important to better understand how changes in organic matter input will affect bacterial communities at the Arctic seafloor. In a multidisciplinary ex situ experiment, benthic bacterial deep-sea communities from the Long-Term Ecological Research Observatory HAUSGARTEN were supplemented with different types of habitat-related detritus (chitin, Arctic algae) and incubated for 23 days under in situ conditions. Chitin addition caused strong changes in community activity, while community structure remained similar to unfed control incubations. In contrast, the addition of phytodetritus resulted in strong changes in community composition, accompanied by increased community activity, indicating the need for adaptation in these treatments. High-throughput sequencing of the 16S rRNA gene and 16S rRNA revealed distinct taxonomic groups of potentially fast-growing, opportunistic bacteria in the different detritus treatments. Compared to the unfed control, Colwelliaceae, Psychromonadaceae, and Oceanospirillaceae increased in relative abundance in the chitin treatment, whereas Flavobacteriaceae, Marinilabiaceae, and Pseudoalteromonadaceae increased in the phytodetritus treatments. Hence, these groups may constitute indicator taxa for the different organic matter sources at this study site. In summary, differences in community structure and in the uptake and remineralization of carbon in the different treatments suggest an effect of organic matter quality on bacterial diversity as well as on carbon turnover at the seafloor, an important feedback mechanism to be considered in future climate change scenarios. |
format |
Article in Journal/Newspaper |
author |
Hoffmann, Katy Hassenrück, Christiane Salman-Carvalho, Verena Holtappels, Moritz Bienhold, Christina |
spellingShingle |
Hoffmann, Katy Hassenrück, Christiane Salman-Carvalho, Verena Holtappels, Moritz Bienhold, Christina Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments |
author_facet |
Hoffmann, Katy Hassenrück, Christiane Salman-Carvalho, Verena Holtappels, Moritz Bienhold, Christina |
author_sort |
Hoffmann, Katy |
title |
Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments |
title_short |
Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments |
title_full |
Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments |
title_fullStr |
Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments |
title_full_unstemmed |
Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments |
title_sort |
response of bacterial communities to different detritus compositions in arctic deep-sea sediments |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/44411/ https://epic.awi.de/id/eprint/44411/1/Hoffmann_2017_Response_of_Bacterial_Communities_in_Arctic_Deep-Sea_Sediments.pdf https://doi.org/10.3389/fmicb.2017.00266 https://hdl.handle.net/10013/epic.50752 https://hdl.handle.net/10013/epic.50752.d001 |
genre |
Arctic Arctic Ocean Climate change |
genre_facet |
Arctic Arctic Ocean Climate change |
op_source |
EPIC3Frontiers in Microbiology, 8, ISSN: 1664-302X |
op_relation |
https://epic.awi.de/id/eprint/44411/1/Hoffmann_2017_Response_of_Bacterial_Communities_in_Arctic_Deep-Sea_Sediments.pdf https://hdl.handle.net/10013/epic.50752.d001 Hoffmann, K. , Hassenrück, C. , Salman-Carvalho, V. , Holtappels, M. orcid:0000-0003-3682-1903 and Bienhold, C. orcid:0000-0003-2269-9468 (2017) Response of Bacterial Communities to Different Detritus Compositions in Arctic Deep-Sea Sediments , Frontiers in Microbiology, 8 . doi:10.3389/fmicb.2017.00266 <https://doi.org/10.3389/fmicb.2017.00266> , hdl:10013/epic.50752 |
op_doi |
https://doi.org/10.3389/fmicb.2017.00266 |
container_title |
Frontiers in Microbiology |
container_volume |
8 |
_version_ |
1810293215827329024 |