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Potential impacts of black carbon on the marine microbial community
- Source :
- CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET, Digital.CSIC. Repositorio Institucional del CSIC, instname, Aquatic Microbial Ecology, Aquatic Microbial Ecology, 2015, 75 (1), pp.27-42. ⟨10.3354/ame01742⟩
- Publication Year :
- 2015
- Publisher :
- Inter-research, 2015.
-
Abstract
- 16 pages, 6 figures, 4 tables<br />Black carbon (BC) is the carbonaceous residue of the incomplete combustion of fossil fuels and biomass and encompasses a range of chemically heterogeneous substances from partly charred plant material to highly condensed soot aerosols. We addressed the potential role of BC aerosol deposition on marine microbial processes in the ocean by investigating the effects of BC reference material (and its exposure to simulated solar radiation) on viral and bacterial activity in batch cultures with aged seawater. Viruses and bacteria were rapidly adsorbed to BC. No difference between the effect of irradiated and non-irradiated BC on free viral parameters was observed. Bacterial leucine incorporation was higher in the BC treatments than in the BC-free controls. The stimulated bacterial production in the dark BC treatments might be caused by the reduction of viral infection due to adsorption of organic material or by direct use of BC material. Viral production was significantly lower in BC-amended treatments than in BC-free controls, and the estimated fraction of infected cells decreased with increasing BC concentration. Moreover, bacterial activity in the solar-radiation-exposed BC treatments was higher than in the dark BC treatments, indicating that radiation made BC more accessible to bacteria. Our data reveal that BC has the potential to stimulate bacterial activity in the water column, particularly after exposure to solar radiation. Rising BC levels in the atmosphere due to increasing anthropogenic emissions could have far-reaching effects, including potential stimulation of seawater heterotrophy and CO2 production, through its effects on bacteria and viruses. © Inter-Research 2015<br />Financial support was provided by the European Union in the framework of the BASICS project (EVK3-CT-2002-00078), by the Eur-Oceans Network of Excellence (Project Number WP4-SYSMS-1021), and a Spanish grant from the ministry of education (SB2010-0079) to A.M. J.M.G. is supported by grant STORM from the Spanish MICINN
- Subjects :
- Heterotroph
Viral lysis
Aquatic Science
medicine.disease_cause
Ciencias Biológicas
purl.org/becyt/ford/1 [https]
Water column
Adsorption
Bacterial Production
medicine
14. Life underwater
purl.org/becyt/ford/1.6 [https]
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Ecology, Evolution, Behavior and Systematics
Bacterial production
biology
Ecology
Chemistry
Light exposure
Viral Lysis
Carbon black
Biología Marina, Limnología
biology.organism_classification
Soot
Black Carbon Aerosols
Microbial population biology
13. Climate action
Environmental chemistry
Light Exposure
Seawater
Black carbon aerosols
CIENCIAS NATURALES Y EXACTAS
Bacteria
Subjects
Details
- Language :
- English
- ISSN :
- 20020007
- Database :
- OpenAIRE
- Journal :
- CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET, Digital.CSIC. Repositorio Institucional del CSIC, instname, Aquatic Microbial Ecology, Aquatic Microbial Ecology, 2015, 75 (1), pp.27-42. ⟨10.3354/ame01742⟩
- Accession number :
- edsair.doi.dedup.....8ebcc96a2fb5ae96eadd9601ecb2e718