Linking Seasonal Reduction of Microbial Diversity to Increase in Winter Temperature of Waters of a Chilean Patagonia Fjord
Since microorganisms play a major role in the biogeochemistry of the ocean, understanding structure and dynamics of natural microbial communities is crucial in assessing the impact of environmental changes on marine ecosystems. In order to identify key environmental drivers of microbial community st...
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ftdoajarticles:oai:doaj.org/article:d13cf741ea574705a0caf73adbf3f37d 2023-05-15T13:54:07+02:00 Linking Seasonal Reduction of Microbial Diversity to Increase in Winter Temperature of Waters of a Chilean Patagonia Fjord Marcelo H. Gutiérrez Diego Narváez Giovanni Daneri Paulina Montero Iván Pérez-Santos Silvio Pantoja 2018-08-01T00:00:00Z https://doi.org/10.3389/fmars.2018.00277 https://doaj.org/article/d13cf741ea574705a0caf73adbf3f37d EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2018.00277/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2018.00277 https://doaj.org/article/d13cf741ea574705a0caf73adbf3f37d Frontiers in Marine Science, Vol 5 (2018) prokaryotic communities environmental drivers winter temperature trend reducing diversity Puyuhuapi fjord Chilean Patagonia Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2018 ftdoajarticles https://doi.org/10.3389/fmars.2018.00277 2022-12-31T15:37:39Z Since microorganisms play a major role in the biogeochemistry of the ocean, understanding structure and dynamics of natural microbial communities is crucial in assessing the impact of environmental changes on marine ecosystems. In order to identify key environmental drivers of microbial community structure in Chilean Patagonian fjords, we analyzed composition of the prokaryotic community over an annual cycle at a single sampling site in Puyuhuapi Fjord. Distinctive communities represented mainly by Actinomycetales, Rhodobacteraceae, Cryomorphaceae, and Flavobacteriaceae were associated with Estuarine Fresh Waters, whereas Cenarchaeaceae and Oceanospirillales were representative of Modified Sub Antarctic Waters present in the fjord. Salinity and oxygen were first-order factors explaining segregation of microbial communities in these contrasting water masses. Positive correlations of members of Flavobacteriaceae, Alteromonadales, and Verrucomicrobiales with diatoms in subsurface waters and of Flavobacteriales (Cryomorphaceae and Flavobacteriaceae), Rhodobacteraceae, and Pelagibacteraceae with dinoflagellates in surface waters suggest that phytoplankton composition could define specific niches for microorganisms in Puyuhuapi fjord waters. A dramatic reduction of richness and individual abundances within Flavobacteriaceae, Rhodobacteraceae, and Cenarchaeaceae families was principally explained by seasonal increase of surface water temperature, with major reduction associated with changes in temperature during winter conditions. Taxa that are sensitive to increased temperature are key components of organic matter and element cycling, and we therefore suggest that potential decrease in diversity associated with rising of surface water temperature could impact current biogeochemical status of Patagonian fjord ecosystems. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic Patagonia Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
prokaryotic communities environmental drivers winter temperature trend reducing diversity Puyuhuapi fjord Chilean Patagonia Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
prokaryotic communities environmental drivers winter temperature trend reducing diversity Puyuhuapi fjord Chilean Patagonia Science Q General. Including nature conservation geographical distribution QH1-199.5 Marcelo H. Gutiérrez Diego Narváez Giovanni Daneri Paulina Montero Iván Pérez-Santos Silvio Pantoja Linking Seasonal Reduction of Microbial Diversity to Increase in Winter Temperature of Waters of a Chilean Patagonia Fjord |
topic_facet |
prokaryotic communities environmental drivers winter temperature trend reducing diversity Puyuhuapi fjord Chilean Patagonia Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Since microorganisms play a major role in the biogeochemistry of the ocean, understanding structure and dynamics of natural microbial communities is crucial in assessing the impact of environmental changes on marine ecosystems. In order to identify key environmental drivers of microbial community structure in Chilean Patagonian fjords, we analyzed composition of the prokaryotic community over an annual cycle at a single sampling site in Puyuhuapi Fjord. Distinctive communities represented mainly by Actinomycetales, Rhodobacteraceae, Cryomorphaceae, and Flavobacteriaceae were associated with Estuarine Fresh Waters, whereas Cenarchaeaceae and Oceanospirillales were representative of Modified Sub Antarctic Waters present in the fjord. Salinity and oxygen were first-order factors explaining segregation of microbial communities in these contrasting water masses. Positive correlations of members of Flavobacteriaceae, Alteromonadales, and Verrucomicrobiales with diatoms in subsurface waters and of Flavobacteriales (Cryomorphaceae and Flavobacteriaceae), Rhodobacteraceae, and Pelagibacteraceae with dinoflagellates in surface waters suggest that phytoplankton composition could define specific niches for microorganisms in Puyuhuapi fjord waters. A dramatic reduction of richness and individual abundances within Flavobacteriaceae, Rhodobacteraceae, and Cenarchaeaceae families was principally explained by seasonal increase of surface water temperature, with major reduction associated with changes in temperature during winter conditions. Taxa that are sensitive to increased temperature are key components of organic matter and element cycling, and we therefore suggest that potential decrease in diversity associated with rising of surface water temperature could impact current biogeochemical status of Patagonian fjord ecosystems. |
format |
Article in Journal/Newspaper |
author |
Marcelo H. Gutiérrez Diego Narváez Giovanni Daneri Paulina Montero Iván Pérez-Santos Silvio Pantoja |
author_facet |
Marcelo H. Gutiérrez Diego Narváez Giovanni Daneri Paulina Montero Iván Pérez-Santos Silvio Pantoja |
author_sort |
Marcelo H. Gutiérrez |
title |
Linking Seasonal Reduction of Microbial Diversity to Increase in Winter Temperature of Waters of a Chilean Patagonia Fjord |
title_short |
Linking Seasonal Reduction of Microbial Diversity to Increase in Winter Temperature of Waters of a Chilean Patagonia Fjord |
title_full |
Linking Seasonal Reduction of Microbial Diversity to Increase in Winter Temperature of Waters of a Chilean Patagonia Fjord |
title_fullStr |
Linking Seasonal Reduction of Microbial Diversity to Increase in Winter Temperature of Waters of a Chilean Patagonia Fjord |
title_full_unstemmed |
Linking Seasonal Reduction of Microbial Diversity to Increase in Winter Temperature of Waters of a Chilean Patagonia Fjord |
title_sort |
linking seasonal reduction of microbial diversity to increase in winter temperature of waters of a chilean patagonia fjord |
publisher |
Frontiers Media S.A. |
publishDate |
2018 |
url |
https://doi.org/10.3389/fmars.2018.00277 https://doaj.org/article/d13cf741ea574705a0caf73adbf3f37d |
geographic |
Antarctic Patagonia |
geographic_facet |
Antarctic Patagonia |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Frontiers in Marine Science, Vol 5 (2018) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2018.00277/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2018.00277 https://doaj.org/article/d13cf741ea574705a0caf73adbf3f37d |
op_doi |
https://doi.org/10.3389/fmars.2018.00277 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
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1766259767071735808 |