Skip to main content


Title: A study of benthic macroinvertebrate communities of fifteen Norfolk Broads during summer 1990
Author: P. Kerrison
Author: G. Phillips
Document Type: Monograph
Broadland in eastern England features fifty shallow, freshwater and brackish lakes and five lowland river systems. The Broads, which occupy basins created between the ninth and fourteenth centuries by local inhabitants who dug peat for fuel, were once low in plant nutrients which helped limit the growth of algae in the water. During the last fifty years, the Broads have received nitrogen and phosphorus compounds from fertilised land and sewage effluent and, as a result, several have undergone ecological changes. These changes are the symptoms of accelerating eutrophication. The National Rivers Authority is presently researching problems associated with the eutrophication of the Norfolk Broads. The study has concentrated on relationships between nutrient supply and plankton community dynamics, and has included little work on the macroinvertebrate communities. The present study provides information on the distribution of benthic macroinvertebrates within fifteen broads and discusses factors controlling the distribution. A mechanism is presented, based on multivariate statistics, for assessing factors affecting communities within individual broads.
Publisher: National Rivers Authority
Publication Date: 1991
Publication Place: Peterborough
Subject Keywords: Trophic levelsBiological surveysPollutant loadEffluentsMacroinvertebrates
Geographic Keywords: BroadlandBroadland Rivers catchmentThe Broads
Extent: 30; + appendices
Total file downloads: 236

Download PDF    Display PDF in separate tab