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Assessing Viral Abundance and Community Composition in Four Contrasting Regions of the Southern Ocean
- Source :
- e-IEO. Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía, instname, Life, Vol 10, Iss 107, p 107 (2020), Life; Volume 10; Issue 7; Pages: 107, Life, Digital.CSIC. Repositorio Institucional del CSIC, Life, MDPI, 2020, 10, ⟨10.3390/life10070107⟩
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- Special issue Microbial Community Structure and Metabolic Networks in Polar Areas.-- 20 pages, 5 figures, 2 tables, supplementary material<br />We explored how changes of viral abundance and community composition among four contrasting regions in the Southern Ocean relied on physicochemical and microbiological traits. During January–February 2015, we visited areas north and south of the South Orkney Islands (NSO and SSO) characterized by low temperature and salinity and high inorganic nutrient concentration, north of South Georgia Island (NSG) and west of Anvers Island (WA), which have relatively higher temperatures and lower inorganic nutrient concentrations. Surface viral abundance (VA) was highest in NSG (21.50 ± 10.70 × 106 viruses mL−1) and lowest in SSO (2.96 ± 1.48 × 106 viruses mL−1). VA was positively correlated with temperature, prokaryote abundance and prokaryotic heterotrophic production, chlorophyll a, diatoms, haptophytes, fluorescent organic matter, and isoprene concentration, and was negatively correlated with inorganic nutrients (NO3−, SiO42−, PO43−), and dimethyl sulfide (DMS) concentrations. Viral communities determined by randomly amplified polymorphic DNA–polymerase chain reaction (RAPD-PCR) were grouped according to the sampling location, being more similar within them than among regions. The first two axes of a canonical correspondence analysis, including physicochemical (temperature, salinity, inorganic nutrients—NO3−, SiO42−, and dimethyl sulfoniopropionate -DMSP- and isoprene concentrations) and microbiological (chlorophyll a, haptophytes and diatom, and prokaryote abundance and prokaryotic heterotrophic production) factors accounted for 62.9% of the variance. The first axis, temperature-related, accounted for 33.8%; the second one, salinity-related, accounted for 29.1%. Thus, different environmental situations likely select different hosts for viruses, leading to distinct viral communities<br />The study was supported by the Spanish Ministry of Economy through projects PEGASO (CTM2012-37615) to R. Simó, and BIO-NUC (CGL2013-49020-R) to M. Dall’Osto<br />With the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI)
- Subjects :
- 0301 basic medicine
Chlorophyll a
010504 meteorology & atmospheric sciences
[SDV]Life Sciences [q-bio]
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Article
03 medical and health sciences
chemistry.chemical_compound
Nutrient
Antarctic Peninsula
Canonical correspondence analysis
Abundance (ecology)
Botany
Phytoplankton
14. Life underwater
Prokaryotes
Medio Marino
skin and connective tissue diseases
lcsh:Science
Southern Ocean
Ecology, Evolution, Behavior and Systematics
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
biology
Paleontology
Prokaryote
biology.organism_classification
Environmental variables
Secondary metabolic compounds
Salinity
Antarctic Ocean
030104 developmental biology
Diatom
chemistry
Centro Oceanográfico de Málaga
Viral community composition
Space and Planetary Science
Viral abundance
[SDE]Environmental Sciences
viral abundance
viral community composition
prokaryotes
phytoplankton
environmental variables
secondary metabolic compounds
lcsh:Q
sense organs
Subjects
Details
- Language :
- English
- ISSN :
- 20751729
- Database :
- OpenAIRE
- Journal :
- e-IEO. Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía, instname, Life, Vol 10, Iss 107, p 107 (2020), Life; Volume 10; Issue 7; Pages: 107, Life, Digital.CSIC. Repositorio Institucional del CSIC, Life, MDPI, 2020, 10, ⟨10.3390/life10070107⟩
- Accession number :
- edsair.doi.dedup.....c9c1400f29f2ad29dc7642035749d51f