Effects of mixtures of dissolved and particulate contaminants on phototrophic biofilms: new insights from a PICT approach combining toxicity tests with passive samplers and model substances
- 20 July 2014
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Science and Pollution Research
- Vol. 22 (6), 4025-4036
- https://doi.org/10.1007/s11356-014-3289-6
Abstract
Streams located in vineyard areas are particularly exposed to mixtures of dissolved and particulate contaminants such as metals and organic pesticides. In this context, phototrophic biofilms are increasingly used as indicators of river water contaminations through pollution-induced community tolerance (PICT) assessments based on short-term toxicity tests with individual or mixtures of toxicants. We conducted a laboratory experiment to evaluate the relative influence of the dissolved and particulate fractions on the effects of metals and pesticides on phototrophic biofilms in a context of contamination from a vineyard watershed. Three sets of artificial channels were supplied with (i) unfiltered water from a stream reference site, (ii) unfiltered water from a stream contaminated site, and (iii) filtered water (0.45 μm) from the same contaminated site. Biofilm growth, diatom community structure, and dissolved toxicant concentrations differed slightly between channels supplied with unfiltered or filtered water from the contaminated site. However, PICT assessments with individual toxicants or mixtures of toxicants extracted from passive samplers suggested no significant difference in tolerance to metals and organic pesticides between phototrophic communities supplied with unfiltered or filtered contaminated water. Our results confirm the use of extracts from passive samplers as a promising approach in short-term toxicity tests to characterize impacts of contamination on aquatic communities.This publication has 46 references indexed in Scilit:
- Enhanced co-tolerance and co-sensitivity from long-term metal exposures of heterotrophic and autotrophic components of fluvial biofilmsScience of The Total Environment, 2011
- Novel approach for assessing heavy metal pollution and ecotoxicological status of rivers by means of passive sampling methodsEnvironment International, 2011
- Combining polar organic chemical integrative samplers (POCIS) with toxicity testing to evaluate pesticide mixture effects on natural phototrophic biofilmsEnvironmental Pollution, 2011
- Linking toxicity in algal and bacterial assays with chemical analysis in passive samplers deployed in 21 treated sewage effluentsEnvironmental Toxicology and Chemistry, 2010
- Effects of a herbicide–insecticide mixture in freshwater microcosms: Risk assessment and ecological effect chainEnvironmental Pollution, 2009
- Linking soils, sediments and catchment ecosystemsJournal of Soils and Sediments, 2008
- Multivariate analyses in microbial ecologyFEMS Microbiology Ecology, 2007
- Combining passive sampling and toxicity testing for evaluation of mixtures of polar organic chemicals in sewage treatment plant effluentJournal of Environmental Monitoring, 2006
- Management, Policy and Science - Do We Need a Journal of Soils AND Sediments?Journal of Soils and Sediments, 2005
- Pollution-Induced Community Tolerance—A New Ecotoxicological ToolPublished by ASTM International ,1988