Calcium and pH in north and central Swedish mire waters
Summary We present data on calcium concentrations and pH in mire waters collected from different mire types in central and northern Sweden, compiled from published literature or calculated from field determinations of electrical conductivity and pH. Measurements of electrical conductivity (after sub...
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crwiley:10.1046/j.1365-2745.2002.00701.x 2024-09-30T14:40:16+00:00 Calcium and pH in north and central Swedish mire waters Sjörs, H. Gunnarsson, U. 2002 http://dx.doi.org/10.1046/j.1365-2745.2002.00701.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2745.2002.00701.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2745.2002.00701.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Ecology volume 90, issue 4, page 650-657 ISSN 0022-0477 1365-2745 journal-article 2002 crwiley https://doi.org/10.1046/j.1365-2745.2002.00701.x 2024-09-11T04:11:14Z Summary We present data on calcium concentrations and pH in mire waters collected from different mire types in central and northern Sweden, compiled from published literature or calculated from field determinations of electrical conductivity and pH. Measurements of electrical conductivity (after subtracting that of H + ions) were used to calculate the most probable Ca concentrations, but only when pH was 4.7 or higher. At lower pH the possible errors become too large. The data support a continuous gradient in water chemistry, but with considerable overlap, from mineral‐poor ombrotrophic bogs and minerotrophic extremely poor fens, to moderately poor fens, intermediate fens, moderately rich fens and finally to extremely rich fens, rather than a discrete division. However, for hydrological reasons, we wish to retain the separation of ombrotrophy (bog) from minerotrophy (fen). The frequency histogram of pH values from central and northern Sweden shows a bimodal tendency, although a considerable number of mires still occur close to the minimum (pH 5.3). Over‐sampling in species‐rich areas could have contributed to the depth of this apparent minimum, but not to its position along the pH scale. Changes in calcium concentrations in mire waters during the last 50 years are discussed and related to changes in pH and conductivity. Article in Journal/Newspaper Northern Sweden Wiley Online Library Journal of Ecology 90 4 650 657 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary We present data on calcium concentrations and pH in mire waters collected from different mire types in central and northern Sweden, compiled from published literature or calculated from field determinations of electrical conductivity and pH. Measurements of electrical conductivity (after subtracting that of H + ions) were used to calculate the most probable Ca concentrations, but only when pH was 4.7 or higher. At lower pH the possible errors become too large. The data support a continuous gradient in water chemistry, but with considerable overlap, from mineral‐poor ombrotrophic bogs and minerotrophic extremely poor fens, to moderately poor fens, intermediate fens, moderately rich fens and finally to extremely rich fens, rather than a discrete division. However, for hydrological reasons, we wish to retain the separation of ombrotrophy (bog) from minerotrophy (fen). The frequency histogram of pH values from central and northern Sweden shows a bimodal tendency, although a considerable number of mires still occur close to the minimum (pH 5.3). Over‐sampling in species‐rich areas could have contributed to the depth of this apparent minimum, but not to its position along the pH scale. Changes in calcium concentrations in mire waters during the last 50 years are discussed and related to changes in pH and conductivity. |
format |
Article in Journal/Newspaper |
author |
Sjörs, H. Gunnarsson, U. |
spellingShingle |
Sjörs, H. Gunnarsson, U. Calcium and pH in north and central Swedish mire waters |
author_facet |
Sjörs, H. Gunnarsson, U. |
author_sort |
Sjörs, H. |
title |
Calcium and pH in north and central Swedish mire waters |
title_short |
Calcium and pH in north and central Swedish mire waters |
title_full |
Calcium and pH in north and central Swedish mire waters |
title_fullStr |
Calcium and pH in north and central Swedish mire waters |
title_full_unstemmed |
Calcium and pH in north and central Swedish mire waters |
title_sort |
calcium and ph in north and central swedish mire waters |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1046/j.1365-2745.2002.00701.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2745.2002.00701.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2745.2002.00701.x |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Journal of Ecology volume 90, issue 4, page 650-657 ISSN 0022-0477 1365-2745 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2745.2002.00701.x |
container_title |
Journal of Ecology |
container_volume |
90 |
container_issue |
4 |
container_start_page |
650 |
op_container_end_page |
657 |
_version_ |
1811642767069151232 |