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Environmental Monitoring and Assessment

, Volume 162, Issue 1–4, pp 47–65 | Cite as

Using diatoms as quality indicators for a newly-formed urban lake and its catchment

  • Ingrid JüttnerEmail author
  • P. James Chimonides
  • Steve J. Ormerod
Article

Abstract

Periphytic diatoms were studied to evaluate the water quality of a newly created lake, formed by the enclosure of the formerly tidal Cardiff Bay (Wales, UK), and the effects of two inflowing rivers which drain densely populated and industrialised catchments. Seven sites in Cardiff Bay and two locations on the inflowing rivers were monitored for diatoms and water chemistry over 2 years. Water quality was assessed using a revised UK trophic diatom index (TDI) and new methods to determine ecological quality ratios and ecological status classes as required by the EU Water Framework Directive. Diatom assemblages reflected spatiotemporal variations in environmental conditions between the rivers and Cardiff Bay and within the bay. In the bay, diatoms reflected differences in river quality and possibly local pollution in certain areas of the lake. High values of the TDI indicated eutrophic to hypertrophic conditions in both rivers and in the bay and diatoms indicated poor ecological status.

Keywords

Water quality Eutrophication Lake Diatom index Cardiff Bay 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Ingrid Jüttner
    • 1
    Email author
  • P. James Chimonides
    • 2
  • Steve J. Ormerod
    • 3
  1. 1.Department of Biodiversity and Systematic BiologyNational Museum WalesCardiffUK
  2. 2.Department of ZoologyNatural History MuseumLondonUK
  3. 3.School of Biosciences, Catchment Research GroupCardiff UniversityCardiffUK

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