The influence of light and water mass on bacterial population dynamics in the Amundsen Sea Polynya
Abstract Despite being perpetually cold, seasonally ice-covered and dark, the coastal Southern Ocean is highly productive and harbors a diverse microbiota. During the austral summer, ice-free coastal patches (or polynyas) form, exposing pelagic organisms to sunlight, triggering intense phytoplankton...
Published in: | Elementa: Science of the Anthropocene |
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ftdoajarticles:oai:doaj.org/article:a3e092f00a39478cb0971d13b7b8732f 2023-05-15T13:23:42+02:00 The influence of light and water mass on bacterial population dynamics in the Amundsen Sea Polynya Inga Richert Julie Dinasquet Ramiro Logares Lasse Riemann Patricia L. Yager Annelie Wendeberg Stefan Bertilsson 2015-04-01T00:00:00Z https://doi.org/10.12952/journal.elementa.000044 https://doaj.org/article/a3e092f00a39478cb0971d13b7b8732f EN eng BioOne http://elementascience.org/article/info:doi/10.12952/journal.elementa.000044 https://doaj.org/toc/2325-1026 2325-1026 doi:10.12952/journal.elementa.000044 https://doaj.org/article/a3e092f00a39478cb0971d13b7b8732f Elementa: Science of the Anthropocene (2015) marine bacterioplankton population dynamics Southern Ocean Environmental sciences GE1-350 article 2015 ftdoajarticles https://doi.org/10.12952/journal.elementa.000044 2022-12-31T14:48:13Z Abstract Despite being perpetually cold, seasonally ice-covered and dark, the coastal Southern Ocean is highly productive and harbors a diverse microbiota. During the austral summer, ice-free coastal patches (or polynyas) form, exposing pelagic organisms to sunlight, triggering intense phytoplankton blooms. This strong seasonality is likely to influence bacterioplankton community composition (BCC). For the most part, we do not fully understand the environmental drivers controlling high-latitude BCC and the biogeochemical cycles they mediate. In this study, the Amundsen Sea Polynya was used as a model system to investigate important environmental factors that shape the coastal Southern Ocean microbiota. Population dynamics in terms of occurrence and activity of abundant taxa was studied in both environmental samples and microcosm experiments by using 454 pyrosequencing of 16S rRNA genes. We found that the BCC in the photic epipelagic zone had low richness, with dominant bacterial populations being related to taxa known to benefit from high organic carbon and nutrient loads (copiotrophs). In contrast, the BCC in deeper mesopelagic water masses had higher richness, featuring taxa known to benefit from low organic carbon and nutrient loads (oligotrophs). Incubation experiments indicated that direct impacts of light and competition for organic nutrients are two important factors shaping BCC in the Amundsen Sea Polynya. Article in Journal/Newspaper Amundsen Sea Southern Ocean Directory of Open Access Journals: DOAJ Articles Amundsen Sea Austral Southern Ocean Elementa: Science of the Anthropocene 3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
marine bacterioplankton population dynamics Southern Ocean Environmental sciences GE1-350 |
spellingShingle |
marine bacterioplankton population dynamics Southern Ocean Environmental sciences GE1-350 Inga Richert Julie Dinasquet Ramiro Logares Lasse Riemann Patricia L. Yager Annelie Wendeberg Stefan Bertilsson The influence of light and water mass on bacterial population dynamics in the Amundsen Sea Polynya |
topic_facet |
marine bacterioplankton population dynamics Southern Ocean Environmental sciences GE1-350 |
description |
Abstract Despite being perpetually cold, seasonally ice-covered and dark, the coastal Southern Ocean is highly productive and harbors a diverse microbiota. During the austral summer, ice-free coastal patches (or polynyas) form, exposing pelagic organisms to sunlight, triggering intense phytoplankton blooms. This strong seasonality is likely to influence bacterioplankton community composition (BCC). For the most part, we do not fully understand the environmental drivers controlling high-latitude BCC and the biogeochemical cycles they mediate. In this study, the Amundsen Sea Polynya was used as a model system to investigate important environmental factors that shape the coastal Southern Ocean microbiota. Population dynamics in terms of occurrence and activity of abundant taxa was studied in both environmental samples and microcosm experiments by using 454 pyrosequencing of 16S rRNA genes. We found that the BCC in the photic epipelagic zone had low richness, with dominant bacterial populations being related to taxa known to benefit from high organic carbon and nutrient loads (copiotrophs). In contrast, the BCC in deeper mesopelagic water masses had higher richness, featuring taxa known to benefit from low organic carbon and nutrient loads (oligotrophs). Incubation experiments indicated that direct impacts of light and competition for organic nutrients are two important factors shaping BCC in the Amundsen Sea Polynya. |
format |
Article in Journal/Newspaper |
author |
Inga Richert Julie Dinasquet Ramiro Logares Lasse Riemann Patricia L. Yager Annelie Wendeberg Stefan Bertilsson |
author_facet |
Inga Richert Julie Dinasquet Ramiro Logares Lasse Riemann Patricia L. Yager Annelie Wendeberg Stefan Bertilsson |
author_sort |
Inga Richert |
title |
The influence of light and water mass on bacterial population dynamics in the Amundsen Sea Polynya |
title_short |
The influence of light and water mass on bacterial population dynamics in the Amundsen Sea Polynya |
title_full |
The influence of light and water mass on bacterial population dynamics in the Amundsen Sea Polynya |
title_fullStr |
The influence of light and water mass on bacterial population dynamics in the Amundsen Sea Polynya |
title_full_unstemmed |
The influence of light and water mass on bacterial population dynamics in the Amundsen Sea Polynya |
title_sort |
influence of light and water mass on bacterial population dynamics in the amundsen sea polynya |
publisher |
BioOne |
publishDate |
2015 |
url |
https://doi.org/10.12952/journal.elementa.000044 https://doaj.org/article/a3e092f00a39478cb0971d13b7b8732f |
geographic |
Amundsen Sea Austral Southern Ocean |
geographic_facet |
Amundsen Sea Austral Southern Ocean |
genre |
Amundsen Sea Southern Ocean |
genre_facet |
Amundsen Sea Southern Ocean |
op_source |
Elementa: Science of the Anthropocene (2015) |
op_relation |
http://elementascience.org/article/info:doi/10.12952/journal.elementa.000044 https://doaj.org/toc/2325-1026 2325-1026 doi:10.12952/journal.elementa.000044 https://doaj.org/article/a3e092f00a39478cb0971d13b7b8732f |
op_doi |
https://doi.org/10.12952/journal.elementa.000044 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
3 |
_version_ |
1766374250299523072 |