An Appraisal of Grazing by Zooplankton on Blue-Green Algal Blooms: A Case Study of Hollingworth Lake, Northwest, UK
Keywords:
Zooplankton, grazing, blue-green algae, lakeAbstract
The grazing of blue-green algae by zooplankton was assessed as an indicator to measure how many counts of blue-green algae could be minimised in Hollingworth Lake over three months during the mid-summer months of 2004 when the water surface temperature increased to about 17°C. Previously, Hollingworth Lake which is a tourist attraction to UK locales, students and tourists alike, had a history of algal bloom formation with filaments of Oscillatoria agardhii and colonies of the diatom Asterionella sp. which contaminated the water and all living organisms there. As a result of this problem, a lake management team was constituted, which devised various techniques that could mitigate future algal bloom formation. This work, however, provides an insight into the effects of the grazing animals of the lake on the reduction of blue-green algae and determines if this method is suitable for reducing eutrophication.
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