Martyn G. Kelly

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A index for monitoring the trophic status of rivers based on diatom composition (‚trophic diatom index’, TDI) has been developed, in response to the National Rivers Authority (England & Wales)'s needs under the terms of the Urban Wastewater Treatment Directive of the European Community. The index is based on a suite of 86 taxa selected both for their(More)
A method for evaluating the similarity of replicate benthic diatom samples based on the Bray-Curtis similarity measure is described. This technique may be useful as part of quality control procedures where objective performance measures are required. Levels of similarity > 60% typically indicate good agreement between the primary analyst and auditor.(More)
The performance of five types of benthic diatom index (four quantitative methods and a zoning system) to evaluate water quality was tested in rivers in England and Scotland. Significant correlations were observed between the four quantitative indices examined. In the case of SPI (Specific Pollution sensitivity Index) and GDI (Generic Diatom Index), over 80%(More)
This review summarises the existing literature and outlines the theoretical basis for using standard methods for sampling diatoms from rivers to sample littoral diatoms and other phytobenthos from standing waters. The European Union's Water Framework Directive has created a statutory obligation for EU Member States to monitor macrophytes and phytobenthos in(More)
The use of diatoms to monitor rivers in the UK was stimulated largely bythe requirements of the European Union's “Urban Wastewater TreatmentDirective”. The Trophic Diatom Index (TDI) was developed to assist theinterpretation of benthic diatom assemblages from UK rivers. This paperdescribes how data collected from one river, the River Wear in N-E(More)
There is an increasing awareness of the need to assess the impact of nutrient enrichment on river ecosystems separately from the impacts of organic effluents. A range of methods have been proposed and some have moved from the development stage to practical use by water management organizations. The methods can be applied to broad surveys or provide baseline(More)
Many methods for using diatoms for routine monitoring of water quality have been developed in Europe and, in some countries, these are being used to enforce environmental legislation. In order to facilitate their wider use, particularly with respect to European Union legislation, steps are being taken to harmonize methodology. In this paper, the principles(More)
A study designed to examine the effect of intermittent diffuse nutrient inputs on diatom assemblages in a small upland stream in northern England was confounded by other changes that occurred in the stream just before fertilisation started. A flora dominated by attached diatoms changed, over a period of about 3 weeks to one dominated by motile Nitzschia(More)
Research to develop tools to assess the ecological status of phytobenthos, as required in Annex V of the European Union Water Framework Directive, has focussed largely on diatoms. Diatoms are often the most abundant and diverse group of algae within the phytobenthos and have been used widely for other monitoring purposes. However, there is little empirical(More)
Water quality, diatom species composition and biomass estimates were performed in the Gharasou River in western Iran. Five sites along the River Gharasou were sampled every month from April to September 2005. Physical and chemical factors (pH, NO3–N, PO4–P, dissolved oxygen, total suspend solids, total dissolved solids, conductivity, turbidity, chemical(More)