Evolution of bacterial communities in the Gironde Estuary (France) according to a salinity gradient |
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| Institution: | 1. Laboratoire de Zoologie, UBO, 29287 Brest Cédex, France;2. Laboratoire d''Hydrobiologie, USTL, 34060 Montpellier Cédex, France;3. IFREMER, Centre de Toulon, BP 330, 83507 La Seyne Cedex, France;4. Centre d''Etude et de Biologie Marine, 29211 Roscoff, France;1. Departamento de Química-Física, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, UNESCO/UNITWIN WiCoP, Campus de Excelencia Internacional del Mar (CEIMAR), Polígono Río San Pedro s/n, Puerto Real, 11510 Cádiz, Spain;2. Departamento de Biomedicina, Biotecnología y Salud Pública, Laboratorio de Microbiología, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Polígono Río San Pedro s/n, Puerto Real, 11510 Cádiz, Spain;1. Carnegie Institution of Washington, Geophysical Laboratory, Washington, DC 20015, USA;2. Woods Hole Oceanographic Institution, Biology Department, Woods Hole, MA 02543, USA;1. Department of Nanobiotechnology, Biology Centre, ISB, CAS, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic;2. Department of General and Industrial Microbiology, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tsankov Blvd, 1164 Sofia, Bulgaria;3. Laboratory Microwave Magnetics, Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, 1784 Sofia, Bulgaria;4. Global Change Research Institute, CAS, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic;5. Department of Applied Chemistry, Faculty of Agriculture, University of South Bohemia, Branisovska 1457, 370 05 Ceske Budejovice, Czech Republic;6. Regional Centre of Advanced Technologies and Materials, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic;1. Department of Anatomy, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang Province 325035, China;2. Institute of Neuroscience, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang Province 325035, China;3. Department of Stomatology, Taizhou Affiliated Hospital of Wenzhou Medical University, Taizhou, Zhejiang Province, 317000, China;4. Department of Histology and Embryology, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang Province 325035, China;5. Department of Pharmacy, Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province 325000, China;6. School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang Province 325035, China;1. Laboratory of Cellular and Molecular Protistology, Zoological Institute, Russian Academy of Sciences, 199034 St. Petersburg, Russia;2. Department of Invertebrate Zoology, Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia;1. Department of Pharmacy, University of Patras School of Health Sciences, Patras, Greece;2. Department of Pathology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, Abu Dhabi, United Arabic Emirates;3. Faculty of Medicine and Health Sciences, Department of Pathology, Bioinformatics Unit, Erasmus University Medical Center, Rotterdam, The Netherlands;4. Department of Pathophysiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece;5. First Department of Dermatology-Venereology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece;6. General Department, University of Thessaly, Karditsa, Greece;7. The Golden Helix Foundation, London, United Kingdom |
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| Abstract: | Three surveys were performed in the Gironde Estuary (France) in August 1981, March 1982 and July 1982. For each campaign, seventy samples were taken by helicopter, in order to follow the tide along the estuary. Of the parameters that were studied, salinity appeared to be the most important and which controls the bacterial communities along the estuary. This paper deals with the evolution of bacterial communities along a salinity gradient. The information obtained from various bacteriological parameters (total bacterial counts, viable counts on salted and unsalted media, functional evenness) were convergent. The bacterial community is dominated by an halotolerant microflora. In the estuary, a continental microflora is followed by a marine microflora. The succession zone between these two microflora is located between 5 and 10‰ areas of salinity. |
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