Acid precipitation and its effects on aquatic systems in the English Lake District

Sutcliffe, D.W. (1983) Acid precipitation and its effects on aquatic systems in the English Lake District. In: Fifty-first annual report for the year ended 31st March 1983. Ambleside, UK, Freshwater Biological Association, pp. 30-62. (Annual Report, Freshwater Biological Association, Ambleside)

[img]
Preview
PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (916Kb) | Preview

Abstract

There is no evidence of an increase in the acidity (lower pH or alkalinity) of water-bodies in the Lake District over the last 50 years. Brown trout occur in acid streams and upland tarns where pH is 4.5-5.2 throughout the year. Their occurrence in such waters in Britain and Ireland has been known for most of this century and there is no previous evidence of harmful effects on salmonid fisheries, though numbers of fish are naturally low. However, many benthic invertebrates that are common in hill-streams where pH is above 5.7 do not occur in more acid streams. This phenomenon occurs in the headwaters of several western rivers in Cumbria. It is not a recent response to "acid rain". Harmful effects of pH are undoubtedly more pronounced in waters that are poor in other dissolved ions. Low concentrations of sodium, potassium, calcium and chloride are especially important and may limit the distributions of some aquatic animals even where pH is above 5.7. The concentration of sulphate ions is usually relatively high but this is not important to the fauna; concentrations are at least two times higher in productive alkaline water-bodies than they are in unproductive acid waters.

Item Type: Book Section
Title: Acid precipitation and its effects on aquatic systems in the English Lake District
Personal Creator/Author:
CreatorsEmail
Sutcliffe, D.W.
Title of Book: Fifty-first annual report for the year ended 31st March 1983
Refereed: No
Series Name: Annual Report, Freshwater Biological Association, Ambleside
Page Range: pp. 30-62
Date: 1983
Publisher: Freshwater Biological Association
Place of Publication: Ambleside, UK
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: Acid rain; Acidification; Alkalinity; Freshwater pollution; pH; Pollution effects; Invertebrata; Salmonidae; England; Lake District; Annual report
Subjects: Chemistry
Ecology
Limnology
Item ID: 5189
Depositing User: Mrs Christine Davey
Date Deposited: 10 May 2011 17:05
Last Modified: 29 Sep 2011 15:16
Related URLs:
URI: http://aquaticcommons.org/id/eprint/5189

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...