Mostrar el registro sencillo del ítem Molina, Verónica Belmar, Lucy Levipan, Héctor A. Ramírez-Flandes, Salvador Anguita, Cristóbal Galán, Alexander Montes Torres, Ivonne Ulloa, Osvaldo 2021-02-10T16:32:05Z 2021-02-10T16:32:05Z 2020-09-25
dc.identifier.citation Molina, V., Belmar, L., Levipan, H. A., Ramírez-Flandes, S., Anguita, C., Galán, A., ... & Ulloa, O. (2020). Spatiotemporal distribution of key pelagic microbes in a seasonal oxygen-deficient coastal upwelling system of the Eastern South Pacific Ocean.==$Frontiers in Marine Science, 7,$==561597. es_ES
dc.identifier.govdoc index-oti2018
dc.description.abstract The strong seasonal variability in physical-chemical conditions of the Eastern South Pacific Ocean creates an ideal setting to study spatiotemporal distribution of key marine microbial communities. We herein report a nearly 4-year-long time series of the variability in amoA gene counts of ammonia oxidizing archaea (AOA) and bacteria (betaproteobacteria, bAOB) by quantitative PCR, GI.1a Thaumarchaeota and MG-II Euryarchaeota by CARD-FISH, and the picoplanktonic community by flow cytometry for this area. During spring-summer, non-photosynthetic picoplankton such as MG-II Euryarchaeota and GI.1a Thaumarchaeota peaked at the surface and deeper waters, respectively. General AOA and bAOB achieved higher abundances at the oxycline mainly in summer (up to 105–104 amoA copies mL−1). Generalized additive models for location, scale, and shape (GAMLSS) indicated that season and depth account for 19–46% of variations in the abundance of the groups studied, particularly GI.1a Thaumarchaeota and AOA. The oxygen and nitrite concentration were statistically meaningful predictors for the studied groups. GAMLSS models indicate that ammonia oxidizing assemblage’s variability is coupled with ammonia, nitrite, and nitrate variations. Our results indicate that microbial abundances fluctuation is associated with upwelling variability and oxygen-deficient water conditions that shape the substrates availability and metabolic response of marine microbes, including keystone ammonia oxidizing assemblages and their ecological interactions. Overall, our results support planktonic nitrification activity and its contribution to nitrous oxide excess production in the time series off Concepción and the ecological dynamics regarding AOA and bAOB in coastal waters. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Frontiers Media es_ES
dc.relation.ispartof urn:issn:2296-7745
dc.rights info:eu-repo/semantics/openAccess es_ES
dc.rights.uri es_ES
dc.subject Thaumarchaea es_ES
dc.subject Chemolithotrophic nitrification es_ES
dc.subject Environmental forcing es_ES
dc.subject Coastal upwelling time-series station es_ES
dc.subject Oxygen minimum zone es_ES
dc.subject Ecological niche es_ES
dc.subject Quantitative PCR es_ES
dc.subject CARD-FISH es_ES
dc.title Spatiotemporal distribution of key pelagic microbes in a seasonal oxygen-deficient coastal upwelling system of the Eastern South Pacific Ocean es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde es_ES
dc.subject.ocde es_ES
dc.subject.ocde es_ES
dc.identifier.journal Frontiers in Marine Science es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




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