Acknowledgements
The authors thank Alain Dinet and Andre´ Mariotti (Deputy
directors INSU, CNRS), Rene´ Bally (Deputy director INEE,
CNRS) who have initiated and supported Environmental
Microbiology action within the Continental and Costal
Ecospheres Program (EC2CO), Marc Trousselier and Philippe
Ackerer (former/current director of EC2CO), all the members
of the scientific committee of Environmental Microbiology
action, Martine Revillon and Chantal Lecocq (assistant
directors EC2CO), Ge´raldine Camus (Publications Office,
Institut Pasteur) and Yves Dessaux (CNRS, Gif-sur-Yvette)
for critical reading of the manuscript .