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The Influence of pCO2-Driven Ocean Acidification on Open Ocean Bacterial Communities during A Short-Term Microcosm Experiment in the Eastern Tropical South Pacific (ETSP) off Northern Chile

1
Department of Aquatic System, Faculty of Environmental Sciences & Environmental Sciences Center EULA Chile, Universidad de Concepción, Concepción 4070386, Chile
2
Millennium Institute of Oceanography (IMO), Universidad de Concepción, Concepción 4070386, Chile
3
Institute of Natural Resources, Faculty of Veterinary medicine and agronomy, Universidad de Las Américas, Sede Concepcion, Chacabuco 539, Concepcion 3349001, Chile
4
Environmental Microbiology Laboratory, Department of Microbiology, Faculty of Biological Sciences, Universidad de Concepción, Concepción 4070386, Chile
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Laboratorio de Fisología y Genética Marina (FIGEMACentro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo 1780000, Chile
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Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo 1780000, Chile
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Department of Oceanography, Universidad de Concepción, Concepción 4070386, Chile
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Department of Molecular Genetics and Microbiology, Pontificia Universidad Católica de Chile, Casilla 160-C, Santiago 8320000, Chile
9
Center for the Study of Multiple Drivers on Marine Socio-Ecological Systems (MUSELS), Universidad de Concepción, Concepción 4070386, Chile
*
Author to whom correspondence should be addressed.
Microorganisms 2020, 8(12), 1924; https://doi.org/10.3390/microorganisms8121924
Received: 6 October 2020 / Revised: 27 November 2020 / Accepted: 28 November 2020 / Published: 4 December 2020
(This article belongs to the Special Issue Molecular Ecology and Genetic Diversity of Marine Microorganisms)
Due to the increasing anthropogenic CO2 emissions, Ocean Acidification (OA) is progressing rapidly around the world. Despite the major role that microorganisms play on the marine biogeochemical cycling and ecosystem functioning, the response of bacterial communities upon OA scenarios is still not well understood. Here, we have conducted a detailed characterization of the composition and relative abundance of bacterial communities in the water column of an open-ocean station in the Eastern Tropical South Pacific (ETSP) off northern Chile and their interactions with environmental factors. In addition, through a short-term microcosm experiment, we have assessed the effect of low pH/high pCO2 conditions over the abundance and genetic diversity of bacterial communities. Our results evidence a clear partitioning of community composition that could be attributed mostly to dissolved oxygen. However, our experimental approach demonstrated that low pH/high pCO2 conditions might modify the structure of the bacterial community, evidencing that small changes in pH may impact significantly the abundance and diversity of key microorganisms. This study constitutes a first step aiming to provide insight about the influence of changing carbonate chemistry conditions on natural bacterial communities and to shed light on the potential impact of OA in biogeochemical cycles on the ETSP region. View Full-Text
Keywords: ocean acidification; bacterial composition; microcosm; bacterial diversity; metagenomics ocean acidification; bacterial composition; microcosm; bacterial diversity; metagenomics
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MDPI and ACS Style

Aguayo, P.; Campos, V.L.; Henríquez, C.; Olivares, F.; De Ia Iglesia, R.; Ulloa, O.; Vargas, C.A. The Influence of pCO2-Driven Ocean Acidification on Open Ocean Bacterial Communities during A Short-Term Microcosm Experiment in the Eastern Tropical South Pacific (ETSP) off Northern Chile. Microorganisms 2020, 8, 1924. https://doi.org/10.3390/microorganisms8121924

AMA Style

Aguayo P, Campos VL, Henríquez C, Olivares F, De Ia Iglesia R, Ulloa O, Vargas CA. The Influence of pCO2-Driven Ocean Acidification on Open Ocean Bacterial Communities during A Short-Term Microcosm Experiment in the Eastern Tropical South Pacific (ETSP) off Northern Chile. Microorganisms. 2020; 8(12):1924. https://doi.org/10.3390/microorganisms8121924

Chicago/Turabian Style

Aguayo, Paulina, Víctor L. Campos, Carlos Henríquez, Francisca Olivares, Rodrigo De Ia Iglesia, Osvaldo Ulloa, and Cristian A. Vargas 2020. "The Influence of pCO2-Driven Ocean Acidification on Open Ocean Bacterial Communities during A Short-Term Microcosm Experiment in the Eastern Tropical South Pacific (ETSP) off Northern Chile" Microorganisms 8, no. 12: 1924. https://doi.org/10.3390/microorganisms8121924

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