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Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently

Coastal marine ecosystems are some of the most diverse natural habitats while being highly vulnerable in the face of climate change. The combination of anthropogenic influence from land and ongoing climate change will likely have severe effects on the environment, but the precise response remains un...

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Autores principales: Seidel, Laura, Broman, Elias, Ståhle, Magnus, Nilsson, Emelie, Turner, Stephanie, Hendrycks, Wouter, Sachpazidou, Varvara, Forsman, Anders, Hylander, Samuel, Dopson, Mark
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9226639/
https://www.ncbi.nlm.nih.gov/pubmed/35755995
http://dx.doi.org/10.3389/fmicb.2022.873281
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author Seidel, Laura
Broman, Elias
Ståhle, Magnus
Nilsson, Emelie
Turner, Stephanie
Hendrycks, Wouter
Sachpazidou, Varvara
Forsman, Anders
Hylander, Samuel
Dopson, Mark
author_facet Seidel, Laura
Broman, Elias
Ståhle, Magnus
Nilsson, Emelie
Turner, Stephanie
Hendrycks, Wouter
Sachpazidou, Varvara
Forsman, Anders
Hylander, Samuel
Dopson, Mark
author_sort Seidel, Laura
collection PubMed
description Coastal marine ecosystems are some of the most diverse natural habitats while being highly vulnerable in the face of climate change. The combination of anthropogenic influence from land and ongoing climate change will likely have severe effects on the environment, but the precise response remains uncertain. This study compared an unaffected “control” Baltic Sea bay to a “heated” bay that has undergone artificial warming from cooling water release from a nuclear power plant for ~50 years. This heated the water in a similar degree to IPCC SSP5-8.5 predictions by 2100 as natural systems to study temperature-related climate change effects. Bottom water and surface sediment bacterial communities and their biogeochemical processes were investigated to test how future coastal water warming alters microbial communities; shifts seasonal patterns, such as increased algae blooming; and influences nutrient and energy cycling, including elevated respiration rates. 16S rRNA gene amplicon sequencing and geochemical parameters demonstrated that heated bay bottom water bacterial communities were influenced by increased average temperatures across changing seasons, resulting in an overall Shannon's H diversity loss and shifts in relative abundances. In contrast, Shannon's diversity increased in the heated surface sediments. The results also suggested a trend toward smaller-sized microorganisms within the heated bay bottom waters, with a 30% increased relative abundance of small size picocyanobacteria in the summer (June). Furthermore, bacterial communities in the heated bay surface sediment displayed little seasonal variability but did show potential changes of long-term increased average temperature in the interplay with related effects on bottom waters. Finally, heated bay metabolic gene predictions from the 16S rRNA gene sequences suggested raised anaerobic processes closer to the sediment-water interface. In conclusion, climate change will likely alter microbial seasonality and diversity, leading to prolonged and increased algae blooming and elevated respiration rates within coastal waters.
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spelling pubmed-92266392022-06-25 Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently Seidel, Laura Broman, Elias Ståhle, Magnus Nilsson, Emelie Turner, Stephanie Hendrycks, Wouter Sachpazidou, Varvara Forsman, Anders Hylander, Samuel Dopson, Mark Front Microbiol Microbiology Coastal marine ecosystems are some of the most diverse natural habitats while being highly vulnerable in the face of climate change. The combination of anthropogenic influence from land and ongoing climate change will likely have severe effects on the environment, but the precise response remains uncertain. This study compared an unaffected “control” Baltic Sea bay to a “heated” bay that has undergone artificial warming from cooling water release from a nuclear power plant for ~50 years. This heated the water in a similar degree to IPCC SSP5-8.5 predictions by 2100 as natural systems to study temperature-related climate change effects. Bottom water and surface sediment bacterial communities and their biogeochemical processes were investigated to test how future coastal water warming alters microbial communities; shifts seasonal patterns, such as increased algae blooming; and influences nutrient and energy cycling, including elevated respiration rates. 16S rRNA gene amplicon sequencing and geochemical parameters demonstrated that heated bay bottom water bacterial communities were influenced by increased average temperatures across changing seasons, resulting in an overall Shannon's H diversity loss and shifts in relative abundances. In contrast, Shannon's diversity increased in the heated surface sediments. The results also suggested a trend toward smaller-sized microorganisms within the heated bay bottom waters, with a 30% increased relative abundance of small size picocyanobacteria in the summer (June). Furthermore, bacterial communities in the heated bay surface sediment displayed little seasonal variability but did show potential changes of long-term increased average temperature in the interplay with related effects on bottom waters. Finally, heated bay metabolic gene predictions from the 16S rRNA gene sequences suggested raised anaerobic processes closer to the sediment-water interface. In conclusion, climate change will likely alter microbial seasonality and diversity, leading to prolonged and increased algae blooming and elevated respiration rates within coastal waters. Frontiers Media S.A. 2022-06-10 /pmc/articles/PMC9226639/ /pubmed/35755995 http://dx.doi.org/10.3389/fmicb.2022.873281 Text en Copyright © 2022 Seidel, Broman, Ståhle, Nilsson, Turner, Hendrycks, Sachpazidou, Forsman, Hylander and Dopson. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Seidel, Laura
Broman, Elias
Ståhle, Magnus
Nilsson, Emelie
Turner, Stephanie
Hendrycks, Wouter
Sachpazidou, Varvara
Forsman, Anders
Hylander, Samuel
Dopson, Mark
Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently
title Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently
title_full Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently
title_fullStr Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently
title_full_unstemmed Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently
title_short Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently
title_sort long-term warming of baltic sea coastal waters affects bacterial communities in bottom water and sediments differently
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9226639/
https://www.ncbi.nlm.nih.gov/pubmed/35755995
http://dx.doi.org/10.3389/fmicb.2022.873281
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