Freshwater prokaryote and virus communities can adapt to a controlled increase in salinity through changes in their structure and interactions

Autor: Combe, Marine, Marine, Combe, Thierry, Bouvier, Pringault, Olivier, Emma, Rochelle-Newall, Corinne, Bouvier, Martin, Agis, The Thu, Pham, Jean-Pascal, Torreton, van Thuoc, Chu, Bettarel, Yvan
Přispěvatelé: Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Institute of Marine Environment and Resources (IMER), Vietnam Academy of Science and Technology (VAST), Laboratoire Microorganismes : Génome et Environnement (LMGE), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Université d'Auvergne - Clermont-Ferrand I (UdA)-Centre National de la Recherche Scientifique (CNRS), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226
Jazyk: angličtina
Rok vydání: 2013
Předmět:
0106 biological sciences
Soil salinity
Range (biology)
[SDE.MCG]Environmental Sciences/Global Changes
virus
Aquatic Science
Biology
microbial ecology
Oceanography
01 natural sciences
salinity
lysogeny
03 medical and health sciences
[SDV.EE.ECO]Life Sciences [q-bio]/Ecology
environment/Ecosystems
Microbial ecology
Abundance (ecology)
[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases
14. Life underwater
ComputingMilieux_MISCELLANEOUS
tropical aquatic ecosystems
[SDV.EE.SANT]Life Sciences [q-bio]/Ecology
environment/Health
0303 health sciences
geography
[SDV.MHEP.ME]Life Sciences [q-bio]/Human health and pathology/Emerging diseases
geography.geographical_feature_category
030306 microbiology
Ecology
010604 marine biology & hydrobiology
prokaryote
Estuary
Prokaryote
biology.organism_classification
[SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology
estuaries
6. Clean water
Salinity
[SDV.MP.VIR]Life Sciences [q-bio]/Microbiology and Parasitology/Virology
Seawater
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Zdroj: Estuarine, Coastal and Shelf Science
Estuarine, Coastal and Shelf Science, 2013, 133, pp.58-66. ⟨10.1016/j.ecss.2013.08.013⟩
Estuarine, Coastal and Shelf Science, Elsevier, 2013, 133, pp.58-66. ⟨10.1016/j.ecss.2013.08.013⟩
ISSN: 0272-7714
1096-0015
DOI: 10.1016/j.ecss.2013.08.013⟩
Popis: Little information exists on the ecological adaptive responses of riverine microorganisms to the salinity changes that typically occur in transitional waters. This study examined the precise effects of a gradual increase in salinity (+3 units per day for 12 days) on freshwater virus and prokaryote communities collected in the Red River Delta (northern Vietnam). The abundance, activity, morphology and diversity of both communities were examined along this simulated salinity gradient (0–36). Three main successive ecological stages were observed: (1) a continuous decline in prokaryotic and viral abundance from the start of the salinization process up to salinity 12–15 together with a strong decrease in the proportion of active cells, (2) a shift in both community compositions (salinity 9–15) and (3) a marked prevalence of lysogenic over lytic cycles up to salinity 21 followed by a collapse of both types of viral infection. Finally, after salinity 21, and up to seawater salinities (i.e. 36) the prokaryotic community showed multiple signs of recovery with their abundance and function even reaching initial levels. These results suggest that most of the physiological and phylogenetic changes that occurred within the salinity range 10–20 seemed to favor the installation of osmotically adapted prokaryotes accompanied by a specific cortege of viral parasites which might both be able to survive and even proliferate in saltwater conditions.
Databáze: OpenAIRE
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