Exploring the role of water chemistry on metal accumulation in biofilms from streams in mining areas

Laderrière, Vincent; Faucheur, Séverine Le; Fortin, Claude

doi:10.1016/j.scitotenv.2021.146986

Cited by 7 publications

(3 citation statements)

References 51 publications

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“…Our results are coherent with those published in a previous field study (Laderriere et al, 2021). Differences were found in the observed relationships between free metal ions and biofilm metal concentrations between two regions distanced 1700 km apart (northern and southern eastern Canada).…”

Section: Discussionsupporting

confidence: 94%

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Temperature and Photoperiod Affect the Sensitivity of Biofilms to Nickel and its Accumulation

Laderrière

Richard

Morin

et al. 2022

Environmental Toxicology and Chemistry

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Whereas metal impacts on fluvial communities have been extensively investigated, effects of abiotic parameters on community responses to contaminants are poorly documented. Variations in photoperiod and temperature commonly occur over the course of a season and could affect aquatic biofilm communities and their responses to contaminants. Our objective was to characterize the influence of environmental conditions (photoperiod and temperature) on nickel (Ni) bioaccumulation and toxicity using a laboratory‐grown biofilm. Environmental parameters were chosen to represent variations that can occur over the summer season. Biofilms were exposed for 7 days to six dissolved Ni treatments (ranging from 6 to 115 µM) at two temperatures (14 and 20 °C) using two photoperiods (16:8 and 12:12‐h light:dark cycle). Under these different scenarios, structural (dry weight biomass and chlorophyll‐a) and functional biomarkers (photosynthetic yield and Ni content) were analyzed at four sampling dates, allowing us to evaluate Ni sensitivity of biofilms over time. The results highlight the effects of temperature on Ni accumulation and tolerance of biofilms. Indeed, biofilms exposed at 20 °C accumulated 1.6–4.2‐fold higher concentrations of Ni and were characterized by a lower median effect concentration value using photosynthetic yield compared with those exposed at 14 °C. In terms of photoperiod, significantly greater rates of Ni accumulation were observed at the highest tested Ni concentration for biofilms exposed to a 12:12‐h compared with a 16:8‐h light:dark cycle. Our study demonstrates the influence of temperature on biofilm metabolism and illustrates that environmental factors may influence Ni accumulation response and thus Ni responses of phototrophic biofilms. Environ Toxicol Chem 2022;41:1649–1662. © 2022 SETAC

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Section: Discussionsupporting

confidence: 94%

“…In a previous study, we found that biofilm metal content was consistent over large geographical scales and in different types of ecosystems (Laderriere et al, 2021). However, some differences in regression slopes observed between free metal ions and biofilm metal concentrations were found for the different studied regions.…”

Section: Introductionmentioning

confidence: 72%

Temperature and Photoperiod Affect the Sensitivity of Biofilms to Nickel and its Accumulation

Laderrière

Richard

Morin

et al. 2022

Environmental Toxicology and Chemistry

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“…At acidic pH values, hydronium ions reach concentrations that can outcompete trace metals for biotic ligands. For example, Laderriere et al (2021) observed that below a pH of 6, the accumulation of Cd, Cu and Ni by river biofilms decreased sharply. Note here that pH has dual and opposing effects (Campbell, 1995).…”

Section: Effects Of Multiple Metals Other Than Competitionmentioning

confidence: 99%

Metal bioavailability in aquatic systems— beyond complexation and competition

Fortin

2024

Front. Environ. Chem.

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Metal bioavailability in solution is mostly driven by two factors: complexation and competition. The first factor, complexation, contributes to decrease the overall reactivity of the metal by reducing the activity of the free metal ion, which is known as the common denominator of metal reactions involving either dissolved ligands or surface functional groups (abiotic or biotic). Ubiquitous in natural ecosystems, natural organic matter is, for several metals, the most important metal complexing ligand. The second factor, competition, contributes to decrease the availability of biotic ligands involved in the membrane transport of metals from the bulk solution to the intracellular medium. In freshwater systems, proton and hardness cation concentrations are the main parameters potentially modulating metal bioavailability. The above reflects the current accepted paradigm. In this paper, two knowledge gaps are identified: i) the role of natural organic matter other than metal complexation that may lead to an increase in metal bioavailability; and ii) the effects of multiple metals other than competition that may trigger biological feedback mechanisms which may, in turn, alter biotic ligand binding properties. More research efforts are needed to decipher the extent of these overlooked potential effects and to improve the predictability of metal bioavailability.

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Modelling of chemical species of Al, Mn, Zn, and Pb in river body waters of industrial areas of West Rhodope Mountain, Bulgaria

Rabadjieva

Kovacheva

Tepavitcharova

et al. 2021

Environ Monit Assess

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Exploring the role of water chemistry on metal accumulation in biofilms from streams in mining areas

Cited by 7 publications

References 51 publications

Temperature and Photoperiod Affect the Sensitivity of Biofilms to Nickel and its Accumulation

Temperature and Photoperiod Affect the Sensitivity of Biofilms to Nickel and its Accumulation

Metal bioavailability in aquatic systems— beyond complexation and competition

Modelling of chemical species of Al, Mn, Zn, and Pb in river body waters of industrial areas of West Rhodope Mountain, Bulgaria

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