Scientific investigations into the eutrophication of the Norfolk Broads

Davies, A.W. (1980) Scientific investigations into the eutrophication of the Norfolk Broads. Ambleside, UK, Freshwater Biological Association, 10pp.

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The word ”Broads” is used to describe a series of relatively shallow lakes resulting from the flooding of medieval peat diggings. Broadland is essentially freshwater, but because the rivers have such low gradients the lower reaches are brackish. The influence of tide is particularly apparent on the River Yare; in Norwich 40 km from the sea there is a vertical movement of half a metre at spring tide. This study examines the problems that the broadlands are facing. The problems are basically the progressive loss of aquatic plants, in particular the macro- phytes, animal life, outbreaks of avian botulism, occasional fish kills due to a toxin produced by the blue-green alga Prymesium parvum and the emergence of very heavy algal blooms. The main factor for the deteriation of the Broaslands is the eutrophication resulting from enhanced nutrient inputs, in particular of nitrates and phosphates, from a variety of sources. The most important of these are sewage effluents, agricultural drainage, which includes fertilisers and nutrient rich effluents from piggeries and dairy un

Item Type: Monograph or Serial Issue
Title: Scientific investigations into the eutrophication of the Norfolk Broads
Personal Creator/Author:
Davies, A.W.
Number of Pages: 10
Date: 1980
Publisher: Freshwater Biological Association
Place of Publication: Ambleside, UK
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: Freshwater lakes; Eutrophication; Algae; Algal blooms; Phytoplankton; Pollution effects; Water quality; England
Subjects: Ecology
Item ID: 5263
Depositing User: Hardy B Schwamm
Date Deposited: 06 May 2011 14:40
Last Modified: 29 Sep 2011 15:09
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