Seasonal and diel distributions of denitrifying and bacterial communities in a hypersaline microbial mat (Camargue, France)
| Autor: | Valérie Michotey, Aude Fourçans, Cui Zhizang, Christelle Desnues, Patricia Bonin, Andrea Wieland, Robert Duran |
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| Přispěvatelé: | Laboratoire de MicrobiologiE de Géochimie et d'Ecologie Marines (LMGEM), Centre National de la Recherche Scientifique (CNRS)-Université de la Méditerranée - Aix-Marseille 2, Institute for Biogeochemistry and Marine Chemistry, Universität Hamburg (UHH), State Key Laboratory for Infectious Disease prevention and Control, Beijing Institute of Technology (BIT), Laboratoire d'Ecologie Microbienne (EA 3525), Université de Pau et des Pays de l'Adour (UPPA), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Ecologie Moléculaire, IBEAS, EA 3525 |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Environmental Engineering
Nitrogen Population Biology Sodium Chloride 03 medical and health sciences Denitrifying bacteria RNA Ribosomal 16S Seawater Microbial mat education Waste Management and Disposal Nitrogen cycle Diel vertical migration ComputingMilieux_MISCELLANEOUS 030304 developmental biology Water Science and Technology Civil and Structural Engineering [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere 0303 health sciences education.field_of_study Bacteria 030306 microbiology Ecology Ecological Modeling Community structure Pollution Anoxic waters 6. Clean water RNA Bacterial Genes Bacterial Biofilms Electrophoresis Polyacrylamide Gel France Seasons Temperature gradient gel electrophoresis |
| Zdroj: | Water Research Water Research, IWA Publishing, 2007, 41, pp.3407-3419 HAL Water Research, 2007, 41, pp.3407-3419 |
| ISSN: | 0043-1354 |
| Popis: | Changes in spatio-temporal distribution of bacterial and denitrifying communities were qualitatively studied in a microbial mat from Camargue (France). During a diel and a seasonal cycle, patterns of 16S rRNA and nitrite reductase genes (nirS and nirK) were compared by denaturing gradient gel electrophoresis (DGGE). Statistical analysis of DGGE profiles showed a significant seasonal shift in the community structure of the nirS-containing bacteria with a winter superficial population that extended in summer, whereas the nirK-containing bacteria seemed more affected by vertical gradients rather than by month-to month-changes. Denitrifying activities remained stable during these sampling times. The bacterial community at the surface of the mat also changed according to season, but appeared stable over a day. Finally, during a diel cycle nirK populations were localized in zones with large fluctuations of environmental parameters (oxygen, pH, and sulfur levels) while nirS populations seemed more restricted to the permanent anoxic layer of the microbial mat. |
| Databáze: | OpenAIRE |
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