NDLI: Structural and functional recovery of microbial biofilms after a decrease in copper exposure: influence of the presence of pristine communities.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lambert, Anne-Sophie Morin, Soizic Artigas, Joan Volat, Bernadette Coquery, Marina Neyra, Marc Pesce, Stéphane
Description	Country affiliation: France Author Affiliation: Lambert AS ( Irstea, UR MALY, 3 bis quai Chauveau--CP 220, F-69336 Lyon, France.)
Abstract	The present study aimed at assessing the recovery of phototrophic and heterotrophic biofilm communities after a decrease in copper exposure. An original experiment was designed to evaluate the possible influence of non-exposed (i.e. pristine) communities (e.g. via immigration processes) in recovery dynamics. Laboratory channels were used to study the structural and functional changes in microbial communities after a 4-week Cu exposure period in the presence and absence of pristine biofilms. When pristine biofilms were present, phototrophic communities recovered within 6 weeks, both in terms of biomass, structure and photosynthetic activity. Recovery processes were also detected using the PICT approach. In contrast, in the absence of pristine communities, all of the Cu-induced changes recorded in the phototrophic communities remained throughout the recovery period. Regardless of the presence or absence of pristine biofilms, the decrease in Cu exposure did not abolish Cu-induced changes in bacterial community structure, whereas functional recovery (based on beta-glucosidase activity) was complete in both recovery contexts. These results revealed that microbial community response to a decrease in Cu exposure differs between phototrophic and heterotrophic communities. The presence of pristine communities greatly influences the structural and functional recovery of phototrophic communities, suggesting an important role of microbial immigration processes, but have far less influence on the recovery trajectory of heterotrophic communities.
File Format	HTM / HTML
ISSN	0166445X
Volume Number	109
e-ISSN	18791514
Journal	Aquatic Toxicology
Language	English
Publisher	Elsevier
Publisher Date	2012-03-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Toxicology Biofilms Drug Effects Copper Toxicity Water Pollutants, Chemical Bacteria Biodiversity Chlorophyta Analysis Diatoms Enzymes Metabolism Fresh Water Chemistry Microbiology Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Aquatic Science

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