Coastal Bacterioplankton Metabolism Is Stimulated Stronger by Anthropogenic Aerosols than Saharan Dust
| Autor: | M. Montserrat Sala, Isabel Marín, Francesc Peters, Estibalitz Txurruka, Sdena Nunes, Cèlia Marrasé, Carolina Antequera, Elvia D. Sanchez-Perez |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España), Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Consejo Nacional de Ciencia y Tecnología (México) |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
anthropogenic aerosols Microbiology (medical) Biogeochemical cycle 010504 meteorology & atmospheric sciences Saharan dust enzymatic activity lcsh:QR1-502 Mineral dust coastal areas Coastal areas 01 natural sciences complex mixtures bacterial production Microbiology lcsh:Microbiology chemistry.chemical_compound Nutrient Mediterranean sea Nitrate Mediterranean Sea 0105 earth and related environmental sciences Original Research Bacterial production Enzymatic activity Ecology 010604 marine biology & hydrobiology Marine bacteria Anthropogenic aerosols Bacterioplankton Plankton chemistry marine bacteria Environmental science Seawater |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Frontiers in Microbiology Frontiers in Microbiology, Vol 8 (2017) |
| Popis: | 17 pages, 9 figures, 3 tables, supplemental material https://www.frontiersin.org/articles/10.3389/fmicb.2017.02215/full#supplementary-material In oligotrophic regions, such as the Mediterranean Sea, atmospheric deposition has the potential to stimulate heterotrophic prokaryote growth and production in surface waters, especially during the summer stratification period. Previous studies focused on the role of leaching nutrients from mineral particles of Saharan (S) origin, and were restricted to single locations at given times of the year. In this study, we evaluate the effect of atmospheric particles from diverse sources and with a markedly different chemical composition [S dust and anthropogenic (A) aerosols] on marine planktonic communities from three locations of the northwestern Mediterranean with contrasted anthropogenic footprint. Experiments were also carried out at different times of the year, considering diverse initial conditions. We followed the dynamics of the heterotrophic community and a range of biogeochemical and physiological parameters in six experiments. While the effect of aerosols on bacterial abundance was overall low, bacterial heterotrophic production was up to 3.3 and 2.1 times higher in the samples amended with A and S aerosols, respectively, than in the controls. Extracellular enzymatic activities [leu-aminopeptidase (AMA) and β-glucosidase (β-Gl)] were also enhanced with aerosols, especially from A origin. AMA and β-Gl increased up to 7.1 in the samples amended with A aerosols, and up to 1.7 and 2.1 times, respectively, with S dust. The larger stimulation observed with A aerosols might be attributed to their higher content in nitrate. However, the response was variable depending the initial status of the seawater. In addition, we found that both A and S aerosols stimulated bacterial abundance and metabolism significantly more in the absence of competitors and predators This study was supported by the Spanish Ministerio de Economía y Competitividad through the projects ADEPT (CTM2011-23458), DOREMI (CTM2012-342949), and ANIMA (CTM2015-65720-R, MINECO/FEDER, EU). IM acknowledges the FPI Spanish scholarship program for a pre-doctoral grant (BES 2012-052976). SN received financial support from the National Counsel of Technological and Scientific Development (CNPq) of Brazil. EDS-P was economically supported by the Consejo Nacional de Ciencia y Tecnologia (CONACyT) of Mexico |
| Databáze: | OpenAIRE |
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