Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community
Abstract Background Cold environments dominate the Earth’s biosphere and microbial activity drives ecosystem processes thereby contributing greatly to global biogeochemical cycles. Polar environments differ to all other cold environments by experiencing 24-h sunlight in summer and no sunlight in win...
Published in: | Microbiome |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
BMC
2020
|
Subjects: | |
Online Access: | https://doi.org/10.1186/s40168-020-00889-8 https://doaj.org/article/deb2697ed2be469198ad3fe37eae0a3b |
id |
ftdoajarticles:oai:doaj.org/article:deb2697ed2be469198ad3fe37eae0a3b |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:deb2697ed2be469198ad3fe37eae0a3b 2023-05-15T14:05:02+02:00 Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community Pratibha Panwar Michelle A. Allen Timothy J. Williams Alyce M. Hancock Sarah Brazendale James Bevington Simon Roux David Páez-Espino Stephen Nayfach Maureen Berg Frederik Schulz I-Min A. Chen Marcel Huntemann Nicole Shapiro Nikos C. Kyrpides Tanja Woyke Emiley A. Eloe-Fadrosh Ricardo Cavicchioli 2020-08-01T00:00:00Z https://doi.org/10.1186/s40168-020-00889-8 https://doaj.org/article/deb2697ed2be469198ad3fe37eae0a3b EN eng BMC http://link.springer.com/article/10.1186/s40168-020-00889-8 https://doaj.org/toc/2049-2618 doi:10.1186/s40168-020-00889-8 2049-2618 https://doaj.org/article/deb2697ed2be469198ad3fe37eae0a3b Microbiome, Vol 8, Iss 1, Pp 1-24 (2020) Antarctic microbiology Polar light cycle Metagenome time series Host-virus interactions Meromictic lake Microbial food web Microbial ecology QR100-130 article 2020 ftdoajarticles https://doi.org/10.1186/s40168-020-00889-8 2022-12-31T03:59:50Z Abstract Background Cold environments dominate the Earth’s biosphere and microbial activity drives ecosystem processes thereby contributing greatly to global biogeochemical cycles. Polar environments differ to all other cold environments by experiencing 24-h sunlight in summer and no sunlight in winter. The Vestfold Hills in East Antarctica contains hundreds of lakes that have evolved from a marine origin only 3000–7000 years ago. Ace Lake is a meromictic (stratified) lake from this region that has been intensively studied since the 1970s. Here, a total of 120 metagenomes representing a seasonal cycle and four summers spanning a 10-year period were analyzed to determine the effects of the polar light cycle on microbial-driven nutrient cycles. Results The lake system is characterized by complex sulfur and hydrogen cycling, especially in the anoxic layers, with multiple mechanisms for the breakdown of biopolymers present throughout the water column. The two most abundant taxa are phototrophs (green sulfur bacteria and cyanobacteria) that are highly influenced by the seasonal availability of sunlight. The extent of the Chlorobium biomass thriving at the interface in summer was captured in underwater video footage. The Chlorobium abundance dropped from up to 83% in summer to 6% in winter and 1% in spring, before rebounding to high levels. Predicted Chlorobium viruses and cyanophage were also abundant, but their levels did not negatively correlate with their hosts. Conclusion Over-wintering expeditions in Antarctica are logistically challenging, meaning insight into winter processes has been inferred from limited data. Here, we found that in contrast to chemolithoautotrophic carbon fixation potential of Southern Ocean Thaumarchaeota, this marine-derived lake evolved a reliance on photosynthesis. While viruses associated with phototrophs also have high seasonal abundance, the negative impact of viral infection on host growth appeared to be limited. The microbial community as a whole appears to have developed a ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean East Antarctica Vestfold Hills Vestfold Ace Lake ENVELOPE(78.188,78.188,-68.472,-68.472) Microbiome 8 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic microbiology Polar light cycle Metagenome time series Host-virus interactions Meromictic lake Microbial food web Microbial ecology QR100-130 |
spellingShingle |
Antarctic microbiology Polar light cycle Metagenome time series Host-virus interactions Meromictic lake Microbial food web Microbial ecology QR100-130 Pratibha Panwar Michelle A. Allen Timothy J. Williams Alyce M. Hancock Sarah Brazendale James Bevington Simon Roux David Páez-Espino Stephen Nayfach Maureen Berg Frederik Schulz I-Min A. Chen Marcel Huntemann Nicole Shapiro Nikos C. Kyrpides Tanja Woyke Emiley A. Eloe-Fadrosh Ricardo Cavicchioli Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community |
topic_facet |
Antarctic microbiology Polar light cycle Metagenome time series Host-virus interactions Meromictic lake Microbial food web Microbial ecology QR100-130 |
description |
Abstract Background Cold environments dominate the Earth’s biosphere and microbial activity drives ecosystem processes thereby contributing greatly to global biogeochemical cycles. Polar environments differ to all other cold environments by experiencing 24-h sunlight in summer and no sunlight in winter. The Vestfold Hills in East Antarctica contains hundreds of lakes that have evolved from a marine origin only 3000–7000 years ago. Ace Lake is a meromictic (stratified) lake from this region that has been intensively studied since the 1970s. Here, a total of 120 metagenomes representing a seasonal cycle and four summers spanning a 10-year period were analyzed to determine the effects of the polar light cycle on microbial-driven nutrient cycles. Results The lake system is characterized by complex sulfur and hydrogen cycling, especially in the anoxic layers, with multiple mechanisms for the breakdown of biopolymers present throughout the water column. The two most abundant taxa are phototrophs (green sulfur bacteria and cyanobacteria) that are highly influenced by the seasonal availability of sunlight. The extent of the Chlorobium biomass thriving at the interface in summer was captured in underwater video footage. The Chlorobium abundance dropped from up to 83% in summer to 6% in winter and 1% in spring, before rebounding to high levels. Predicted Chlorobium viruses and cyanophage were also abundant, but their levels did not negatively correlate with their hosts. Conclusion Over-wintering expeditions in Antarctica are logistically challenging, meaning insight into winter processes has been inferred from limited data. Here, we found that in contrast to chemolithoautotrophic carbon fixation potential of Southern Ocean Thaumarchaeota, this marine-derived lake evolved a reliance on photosynthesis. While viruses associated with phototrophs also have high seasonal abundance, the negative impact of viral infection on host growth appeared to be limited. The microbial community as a whole appears to have developed a ... |
format |
Article in Journal/Newspaper |
author |
Pratibha Panwar Michelle A. Allen Timothy J. Williams Alyce M. Hancock Sarah Brazendale James Bevington Simon Roux David Páez-Espino Stephen Nayfach Maureen Berg Frederik Schulz I-Min A. Chen Marcel Huntemann Nicole Shapiro Nikos C. Kyrpides Tanja Woyke Emiley A. Eloe-Fadrosh Ricardo Cavicchioli |
author_facet |
Pratibha Panwar Michelle A. Allen Timothy J. Williams Alyce M. Hancock Sarah Brazendale James Bevington Simon Roux David Páez-Espino Stephen Nayfach Maureen Berg Frederik Schulz I-Min A. Chen Marcel Huntemann Nicole Shapiro Nikos C. Kyrpides Tanja Woyke Emiley A. Eloe-Fadrosh Ricardo Cavicchioli |
author_sort |
Pratibha Panwar |
title |
Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community |
title_short |
Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community |
title_full |
Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community |
title_fullStr |
Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community |
title_full_unstemmed |
Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community |
title_sort |
influence of the polar light cycle on seasonal dynamics of an antarctic lake microbial community |
publisher |
BMC |
publishDate |
2020 |
url |
https://doi.org/10.1186/s40168-020-00889-8 https://doaj.org/article/deb2697ed2be469198ad3fe37eae0a3b |
long_lat |
ENVELOPE(78.188,78.188,-68.472,-68.472) |
geographic |
Antarctic Southern Ocean East Antarctica Vestfold Hills Vestfold Ace Lake |
geographic_facet |
Antarctic Southern Ocean East Antarctica Vestfold Hills Vestfold Ace Lake |
genre |
Antarc* Antarctic Antarctica East Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Southern Ocean |
op_source |
Microbiome, Vol 8, Iss 1, Pp 1-24 (2020) |
op_relation |
http://link.springer.com/article/10.1186/s40168-020-00889-8 https://doaj.org/toc/2049-2618 doi:10.1186/s40168-020-00889-8 2049-2618 https://doaj.org/article/deb2697ed2be469198ad3fe37eae0a3b |
op_doi |
https://doi.org/10.1186/s40168-020-00889-8 |
container_title |
Microbiome |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766276668610052096 |