Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard)
International audience The Arctic is experiencing dramatic changes including increases in precipitation, glacial melt, and permafrost thaw, resulting in increasing freshwater runoff to coastal waters. During the melt season, terrestrial runoff delivers carbon- and nutrient-rich freshwater to Arctic...
Published in: | Frontiers in Microbiology |
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Online Access: | https://hal.science/hal-04312256 https://hal.science/hal-04312256/document https://hal.science/hal-04312256/file/fmicb-12-614634.pdf https://doi.org/10.3389/fmicb.2021.614634 |
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ftunivlyon:oai:HAL:hal-04312256v1 2023-12-31T10:03:17+01:00 Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard) Delpech, Lisa-Marie Vonnahme, Tobias, R Mcgovern, Maeve Gradinger, Rolf Præbel, Kim Poste, Amanda, E École normale supérieure de Lyon (ENS de Lyon) The Arctic University of Norway Tromsø, Norway (UiT) Norwegian Institute for Water Research (NIVA) 2021-02-26 https://hal.science/hal-04312256 https://hal.science/hal-04312256/document https://hal.science/hal-04312256/file/fmicb-12-614634.pdf https://doi.org/10.3389/fmicb.2021.614634 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/fmicb.2021.614634 hal-04312256 https://hal.science/hal-04312256 https://hal.science/hal-04312256/document https://hal.science/hal-04312256/file/fmicb-12-614634.pdf doi:10.3389/fmicb.2021.614634 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1664-302X EISSN: 1664-302X Frontiers in Microbiology https://hal.science/hal-04312256 Frontiers in Microbiology, 2021, 12, ⟨10.3389/fmicb.2021.614634⟩ Arctic climate change land-ocean connectivity pelagic microbial communities freshwater runoff melt season rivers and sediments biogeochemical cycles [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology info:eu-repo/semantics/article Journal articles 2021 ftunivlyon https://doi.org/10.3389/fmicb.2021.614634 2023-12-06T17:37:51Z International audience The Arctic is experiencing dramatic changes including increases in precipitation, glacial melt, and permafrost thaw, resulting in increasing freshwater runoff to coastal waters. During the melt season, terrestrial runoff delivers carbon- and nutrient-rich freshwater to Arctic coastal waters, with unknown consequences for the microbial communities that play a key role in determining the cycling and fate of terrestrial matter at the land-ocean interface. To determine the impacts of runoff on coastal microbial (bacteria and archaea) communities, we investigated changes in pelagic microbial community structure between the early (June) and late (August) melt season in 2018 in the Isfjorden system (Svalbard). Amplicon sequences of the 16S rRNA gene were generated from water column, river and sediment samples collected in Isfjorden along fjord transects from shallow river estuaries and glacier fronts to the outer fjord. Community shifts were investigated in relation to environmental gradients, and compared to river and marine sediment microbial communities. We identified strong temporal and spatial reorganizations in the structure and composition of microbial communities during the summer months in relation to environmental conditions. Microbial diversity patterns highlighted a reorganization from rich communities in June toward more even and less rich communities in August. In June, waters enriched in dissolved organic carbon (DOC) provided a niche for copiotrophic taxa including Sulfitobacter and Octadecabacter . In August, lower DOC concentrations and Atlantic water inflow coincided with a shift toward more cosmopolitan taxa usually associated with summer stratified periods (e.g., SAR11 Clade Ia), and prevalent oligotrophic marine clades (OM60, SAR92). Higher riverine inputs of dissolved inorganic nutrients and suspended particulate matter also contributed to spatial reorganizations of communities in August. Sentinel taxa of this late summer fjord environment included taxa from the class ... Article in Journal/Newspaper Arctic Climate change glacier Isfjord* Isfjorden permafrost Svalbard Université de Lyon: HAL Frontiers in Microbiology 12 |
institution |
Open Polar |
collection |
Université de Lyon: HAL |
op_collection_id |
ftunivlyon |
language |
English |
topic |
Arctic climate change land-ocean connectivity pelagic microbial communities freshwater runoff melt season rivers and sediments biogeochemical cycles [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology |
spellingShingle |
Arctic climate change land-ocean connectivity pelagic microbial communities freshwater runoff melt season rivers and sediments biogeochemical cycles [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology Delpech, Lisa-Marie Vonnahme, Tobias, R Mcgovern, Maeve Gradinger, Rolf Præbel, Kim Poste, Amanda, E Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard) |
topic_facet |
Arctic climate change land-ocean connectivity pelagic microbial communities freshwater runoff melt season rivers and sediments biogeochemical cycles [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology |
description |
International audience The Arctic is experiencing dramatic changes including increases in precipitation, glacial melt, and permafrost thaw, resulting in increasing freshwater runoff to coastal waters. During the melt season, terrestrial runoff delivers carbon- and nutrient-rich freshwater to Arctic coastal waters, with unknown consequences for the microbial communities that play a key role in determining the cycling and fate of terrestrial matter at the land-ocean interface. To determine the impacts of runoff on coastal microbial (bacteria and archaea) communities, we investigated changes in pelagic microbial community structure between the early (June) and late (August) melt season in 2018 in the Isfjorden system (Svalbard). Amplicon sequences of the 16S rRNA gene were generated from water column, river and sediment samples collected in Isfjorden along fjord transects from shallow river estuaries and glacier fronts to the outer fjord. Community shifts were investigated in relation to environmental gradients, and compared to river and marine sediment microbial communities. We identified strong temporal and spatial reorganizations in the structure and composition of microbial communities during the summer months in relation to environmental conditions. Microbial diversity patterns highlighted a reorganization from rich communities in June toward more even and less rich communities in August. In June, waters enriched in dissolved organic carbon (DOC) provided a niche for copiotrophic taxa including Sulfitobacter and Octadecabacter . In August, lower DOC concentrations and Atlantic water inflow coincided with a shift toward more cosmopolitan taxa usually associated with summer stratified periods (e.g., SAR11 Clade Ia), and prevalent oligotrophic marine clades (OM60, SAR92). Higher riverine inputs of dissolved inorganic nutrients and suspended particulate matter also contributed to spatial reorganizations of communities in August. Sentinel taxa of this late summer fjord environment included taxa from the class ... |
author2 |
École normale supérieure de Lyon (ENS de Lyon) The Arctic University of Norway Tromsø, Norway (UiT) Norwegian Institute for Water Research (NIVA) |
format |
Article in Journal/Newspaper |
author |
Delpech, Lisa-Marie Vonnahme, Tobias, R Mcgovern, Maeve Gradinger, Rolf Præbel, Kim Poste, Amanda, E |
author_facet |
Delpech, Lisa-Marie Vonnahme, Tobias, R Mcgovern, Maeve Gradinger, Rolf Præbel, Kim Poste, Amanda, E |
author_sort |
Delpech, Lisa-Marie |
title |
Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard) |
title_short |
Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard) |
title_full |
Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard) |
title_fullStr |
Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard) |
title_full_unstemmed |
Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard) |
title_sort |
terrestrial inputs shape coastal bacterial and archaeal communities in a high arctic fjord (isfjorden, svalbard) |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-04312256 https://hal.science/hal-04312256/document https://hal.science/hal-04312256/file/fmicb-12-614634.pdf https://doi.org/10.3389/fmicb.2021.614634 |
genre |
Arctic Climate change glacier Isfjord* Isfjorden permafrost Svalbard |
genre_facet |
Arctic Climate change glacier Isfjord* Isfjorden permafrost Svalbard |
op_source |
ISSN: 1664-302X EISSN: 1664-302X Frontiers in Microbiology https://hal.science/hal-04312256 Frontiers in Microbiology, 2021, 12, ⟨10.3389/fmicb.2021.614634⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fmicb.2021.614634 hal-04312256 https://hal.science/hal-04312256 https://hal.science/hal-04312256/document https://hal.science/hal-04312256/file/fmicb-12-614634.pdf doi:10.3389/fmicb.2021.614634 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/fmicb.2021.614634 |
container_title |
Frontiers in Microbiology |
container_volume |
12 |
_version_ |
1786819905268482048 |