Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1897/03-647.1
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Title (Primary) Predicting and observing responses of algal communities to photosystem II-herbicide exposure using pollution-induced community tolerance and species-sensitivity distributions
Author Schmitt-Jansen, M.; Altenburger, R.
Source Titel Environmental Toxicology and Chemistry
Year 2005
Department BIOTOX
Volume 24
Issue 2
Page From 304
Page To 312
Language englisch
Keywords Periphyton; Environmental risk assessment; Atrazine; Prometryn; Isoproturon
Abstract Various test strategies are in use in ecotoxicology to assess the potential risks of toxicants on aquatic communities. The species-sensitivity distribution concept (SSD) works by arranging single-species laboratory test data in a cumulative frequency distribution. The pollution-induced community tolerance concept (PICT) uses observable community responses by measuring increases in community tolerance caused by the replacement of sensitive species after exposure. The aim of this study was to compare these two concepts in assessing the effects of three herbicides. Atrazine, prometryn, and isoproturon were found to increase community tolerance by a factor up to six. Atrazine increased community tolerance only at higher test concentrations (0.125 mg L−1). Species-sensitivity distributions correspond well to community responses: The median effective concentrations (EC50s) of untreated periphyton communities tested covered 55 to 65% of affected species represented in the SSD. The sensitivities of tolerant algal communities shifted to the right end of the SSDs. In the microcosm experiments, higher test concentrations affected biomass, species numbers, and community structure. Community tolerance could not be induced any further, suggesting that these concentrations represent a maximum of functional redundancy of a functional group. At higher concentrations, even the least-sensitive species are affected. These results can be interpreted as a confirmation of the SSD concept by observed algal community responses, when applied to photosystem II (PSII)—inhibiting herbicides.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=3771
Schmitt-Jansen, M., Altenburger, R. (2005):
Predicting and observing responses of algal communities to photosystem II-herbicide exposure using pollution-induced community tolerance and species-sensitivity distributions
Environ. Toxicol. Chem. 24 (2), 304 - 312 10.1897/03-647.1