Effects of copper and temperature on aquatic bacterial communities

Boivin, Marie-Elène Y.; Massieux, Boris; Breure, A.M.; Ende, Frank P. van den; Greve, Gerdit D.; Rutgers, Michiel; Admiraal, Wim

doi:10.1016/j.aquatox.2004.12.004

Cited by 39 publications

(26 citation statements)

References 33 publications

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“…Even though the artificial nature of the supports used was likely to influence the community composition (9), the 2006 diatom community structure from metallic supports exhibited similarities of Ͼ80% with communities from pebble assemblages collected simultaneously (data not shown), demonstrating that realistic PRB communities were studied. Significant differences in Chl a content and diatom and bacterial community compositions were observed between copper-and stainless steel-grown PRB, and these observations are consistent with previous observations demonstrating the sensitivity of PRB communities to copper exposure (1,4,55). The differences observed between the 2006 and 2007 experiments should be interpreted as climate-dependent interannual variations (e.g., in a river flow regime).…”

Section: Discussionsupporting

confidence: 81%

Electroactivity of Phototrophic River Biofilms and Constitutive Cultivable Bacteria

Lyautey

Cournet

Morin

et al. 2011

Appl Environ Microbiol

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Electroactivity is a property of microorganisms assembled in biofilms that has been highlighted in a variety of environments. This characteristic was assessed for phototrophic river biofilms at the community scale and at the bacterial population scale. At the community scale, electroactivity was evaluated on stainless steel and copper alloy coupons used both as biofilm colonization supports and as working electrodes. At the population scale, the ability of environmental bacterial strains to catalyze oxygen reduction was assessed by cyclic voltammetry. Our data demonstrate that phototrophic river biofilm development on the electrodes, measured by dry mass and chlorophyll a content, resulted in significant increases of the recorded potentials, with potentials of up to ؉120 mV/saturated calomel electrode (SCE) on stainless steel electrodes and ؉60 mV/SCE on copper electrodes. Thirty-two bacterial strains isolated from natural phototrophic river biofilms were tested by cyclic voltammetry. Twenty-five were able to catalyze oxygen reduction, with shifts of potential ranging from 0.06 to 0.23 V, cathodic peak potentials ranging from ؊0.36 to ؊0.76 V/SCE, and peak amplitudes ranging from ؊9.5 to ؊19.4 A. These isolates were diversified phylogenetically (Actinobacteria, Firmicutes, Bacteroidetes, and Alpha-, Beta-, and Gammaproteobacteria) and exhibited various phenotypic properties (Gram stain, oxidase, and catalase characteristics). These data suggest that phototrophic river biofilm communities and/or most of their constitutive bacterial populations present the ability to promote electronic exchange with a metallic electrode, supporting the following possibilities: (i) development of electrochemistry-based sensors allowing in situ phototrophic river biofilm detection and (ii) production of microbial fuel cell inocula under oligotrophic conditions.

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Section: Discussionsupporting

confidence: 81%

Electroactivity of Phototrophic River Biofilms and Constitutive Cultivable Bacteria

Lyautey

Cournet

Morin

et al. 2011

Appl Environ Microbiol

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“…For example, in 2002 and 2004 Guasch et al demonstrated the potential influence of water pH and phosphorous enrichment on Cu toxicity to benthic algal communities, while Boivin et al (2005) showed the influence of water temperature on Cu toxicity to biofilm bacterial communities. However, Tlili et al (2010) showed that, depending on the functional descriptor used and the microbial community targeted, the influence of the confounding factors could be variable or even null.…”

Section: Discussionmentioning

confidence: 97%

In situ spatio-temporal changes in pollution-induced community tolerance to zinc in autotrophic and heterotrophic biofilm communities

Tlili¹,

Corcoll

Bonet

et al. 2011

Ecotoxicology

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Pollution-induced community tolerance (PICT) uses increased tolerance in populations at contaminated sites as an indicator of contaminant effects. However, given the broad structural and functional complexity that characterizes biological communities, the acquisition of PICT could vary with (i) target community, (ii) intensity of toxicant exposure, (iii) the species succession stage, and (iv) the physicochemical characteristics of the studied site. To assess the spatio-temporal changes of zinc-induced tolerance in fluvial biofilm communities, we conducted an in situ study in Osor River (North-East Catalonia, Spain), which has zinc contamination. Biofilms were developed for 5 weeks in a non-metal-polluted site, and were then transferred to different sites in Osor River with different levels of zinc contamination. The spatio-temporal changes of biofilm PICT to zinc was determined using photosynthetic activity bioassays and respiration-induced aerobic bioassays at T(0), and at 1, 3 and 5 weeks of exposure. We also performed physicochemical characterization of the sites, taxonomic analysis of diatoms, bacterial and fungal diversity and profiled pigments of phototrophic communities. We used multivariate ordination to analyze results. In addition to natural species succession, the intensity of metal pollution exerted structural pressure by selecting the most metal-tolerant species, but differently depending on the type of biofilm. Zn-tolerance values indicated that exposure to high levels of zinc had effects that were similar to a longer exposure to lower levels of zinc.

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“…Overall, this adaptation results in a lowered sensitivity to this contaminant and higher effective concentration (EC x ) values. This approach has already been successfully applied to evaluating the tolerance of algal communities to pesticides (Dorigo et al, 2004;Bérard et al, 2003) and of bacterial communities to metals (Boivin et al, 2005), demonstrating upstreamdownstream gradients in a wine-growing drainage basin (Dorigo et al, 2007 and differentiating between chronic and acute effects (Tlili et al, 2008). Such methods, associated with molecular tools for biodiversity studies, have lent new perspectives to bioindication based on microbial communities.…”

Section: Introductionmentioning

confidence: 98%

The periphyton as a multimetric bioindicator for assessing the impact of land use on rivers: an overview of the Ardières-Morcille experimental watershed (France)

Montuelle¹,

Dorigo²,

Bérard³

et al. 2010

Hydrobiologia

103

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Effects of copper and temperature on aquatic bacterial communities

Cited by 39 publications

References 33 publications

Electroactivity of Phototrophic River Biofilms and Constitutive Cultivable Bacteria

Electroactivity of Phototrophic River Biofilms and Constitutive Cultivable Bacteria

In situ spatio-temporal changes in pollution-induced community tolerance to zinc in autotrophic and heterotrophic biofilm communities

The periphyton as a multimetric bioindicator for assessing the impact of land use on rivers: an overview of the Ardières-Morcille experimental watershed (France)

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