The ecology of the Gussage, a lined winterbourne

Furse, M.T. (1977) The ecology of the Gussage, a lined winterbourne. In: Forty-fifth annual report for the year ended 31st March 1977. Ambleside, UK, Freshwater Biological Association, (Annual Report, Freshwater Biological Association, Ambleside)

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The Gussage, a Dorset winterhourne (intermittent chalk stream), has been used to convey water from a compensation borehole to the River Allen to supplement its flow to meet demand for water. Sections of the Gussage have been lined with chalk, butyl sheeting or polythene sheeting to prevent water loss through the porous bed. The effects of this major environmental modification associated with these abstraction practices in the winterbourne catchments have been studied in the Gussage system since 1973. To compensate for the lack of adequate pre-lining data, comparative studies have been made on 3 small unlined chalk streams of varying flow regimes, ie. the Crichel (a winterbourne), the North Winterbourne and the Tarrant (permanent discharge in the reaches studies). The distribution of macrophytes and invertebrates in winterbournes are compared with that in natural and artificial permanent streams. Statistical analysis showed samples from the winterbourne sites and the unmodified permanent stream sites are quite distinct, despite the fact that no samples were taken from winterbourne sites during the dry phase. This emphasizes the differences between the fauna of an intermittent and a permanent stream and suggests that alteration of the flow regime could be a significant factor. Where flow regime has been altered, as in the Gussage downstream of the borehole, the samples occupy an intermediate position. Within this group of modified sites there is no apparent gross difference between the invertebrates of lined or unlined reaches.

Item Type: Book Section
Title: The ecology of the Gussage, a lined winterbourne
Personal Creator/Author:
Furse, M.T.
Title of Book: Forty-fifth annual report for the year ended 31st March 1977
Refereed: No
Series Name: Annual Report, Freshwater Biological Association, Ambleside
Date: 1977
Publisher: Freshwater Biological Association
Place of Publication: Ambleside, UK
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: Ecological distribution; Ecology; Watersheds; England; Dorset; Annual report
Subjects: Biology
Item ID: 5165
Depositing User: Mrs Christine Davey
Date Deposited: 10 May 2011 17:18
Last Modified: 29 Sep 2011 15:18
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