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The effects of copper and zinc on biomass and taxonomic composition of algal periphyton communities from the River Gharasou, Western Iran

Atazadeh I., Kelly M., Sharifi M., Beardall J.

Oceanological and Hydrobiological Studies

2009

Vol. 38, No.3

3-14

Indoor artificial streams were used to evaluate the short-term (24 day) influence of copper and zinc, individually and in combination, on the biomass and taxonomic composition of algal periphyton communities. The effects of Cu (50 μg 1^-1) and Zn (1 mg 1^-1) were assessed using measurements of biomass, ash-free dry mass (AFDM), chlorophyll-a concentration, taxonomic composition and biovolume. In artificial streams with Cu, Zn and Cu+Zn, there were significant (p < 0.05) reductions of chlorophyll-a concentrations, dry mass and AFDM, and also changes in the species diversity and relative abundances of periphyton species. In artificial streams containing both Cu and Zn the taxonomic composition shifted from a Cyanophyceaen dominated community to one consisting mainly of Chlorophyceae, whilst the relative contribution of Bacillariophyceae was not significantly altered.

International and European standards for algalbased monitoring

Kelly M.

Oceanological and Hydrobiological Studies

2004

Vol. 33, No. 1

77--85

International and European standards relevant to algal-based monitoring have been developed by the International Standards Organisation (ISO) and the Comité Européen de Normalisation (CEN). This work has been given new impetus by the publication of the EU Water Framework Directive (2000/60/EC), which requires the use of CEN and ISO standards where available. Standards addressing diatom sampling and analysis, macrophyte survey, algal survey and phytoplankton analysis are all either published or under development by CEN. There is also a standard under development dealing with quality assurance of ecological assessments in the aquatic environment. Together, these standards should ensure that robust data are collected that can be used for intercalibrations between Member States.