Acid precipitation and its effects on aquatic systems in the English Lake District
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.
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Format: | book_section biblioteca |
Language: | English |
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Freshwater Biological Association
1983
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Subjects: | Chemistry, Ecology, Limnology, Acid rain, Acidification, Alkalinity, Freshwater pollution, pH, Pollution effects, Invertebrata, Salmonidae, England, Lake District, Annual report, |
Online Access: | http://hdl.handle.net/1834/22712 |
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dig-aquadocs-1834-227122021-07-09T02:01:45Z Acid precipitation and its effects on aquatic systems in the English Lake District Fifty-first annual report for the year ended 31st March 1983 Sutcliffe, D.W. Chemistry Ecology Limnology Acid rain Acidification Alkalinity Freshwater pollution pH Pollution effects Invertebrata Salmonidae England Lake District Annual report 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. 2021-06-24T16:03:58Z 2021-06-24T16:03:58Z 1983 book_section FALSE http://hdl.handle.net/1834/22712 en Annual Report, Freshwater Biological Association, Ambleside http://www.fba.org.uk/ application/pdf application/pdf 30-62 Freshwater Biological Association Ambleside, UK http://aquaticcommons.org/id/eprint/5189 3949 2011-09-29 15:16:49 5189 Freshwater Biological Association |
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Chemistry Ecology Limnology Acid rain Acidification Alkalinity Freshwater pollution pH Pollution effects Invertebrata Salmonidae England Lake District Annual report Chemistry Ecology Limnology Acid rain Acidification Alkalinity Freshwater pollution pH Pollution effects Invertebrata Salmonidae England Lake District Annual report |
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Chemistry Ecology Limnology Acid rain Acidification Alkalinity Freshwater pollution pH Pollution effects Invertebrata Salmonidae England Lake District Annual report Chemistry Ecology Limnology Acid rain Acidification Alkalinity Freshwater pollution pH Pollution effects Invertebrata Salmonidae England Lake District Annual report Sutcliffe, D.W. Acid precipitation and its effects on aquatic systems in the English Lake District |
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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. |
format |
book_section |
topic_facet |
Chemistry Ecology Limnology Acid rain Acidification Alkalinity Freshwater pollution pH Pollution effects Invertebrata Salmonidae England Lake District Annual report |
author |
Sutcliffe, D.W. |
author_facet |
Sutcliffe, D.W. |
author_sort |
Sutcliffe, D.W. |
title |
Acid precipitation and its effects on aquatic systems in the English Lake District |
title_short |
Acid precipitation and its effects on aquatic systems in the English Lake District |
title_full |
Acid precipitation and its effects on aquatic systems in the English Lake District |
title_fullStr |
Acid precipitation and its effects on aquatic systems in the English Lake District |
title_full_unstemmed |
Acid precipitation and its effects on aquatic systems in the English Lake District |
title_sort |
acid precipitation and its effects on aquatic systems in the english lake district |
publisher |
Freshwater Biological Association |
publishDate |
1983 |
url |
http://hdl.handle.net/1834/22712 |
work_keys_str_mv |
AT sutcliffedw acidprecipitationanditseffectsonaquaticsystemsintheenglishlakedistrict AT sutcliffedw fiftyfirstannualreportfortheyearended31stmarch1983 |
_version_ |
1756077667214426112 |