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Recent temporal patterns in the chemistry of small, acid-sensitive lakes in central Ontario, Canada

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Title: Recent temporal patterns in the chemistry of small, acid-sensitive lakes in central Ontario, Canada
Authors: Laberge, C., Cluis, D. A., McNichol, D. K., Mallory, M. L.
Source: Water, Air & Soil Pollution. Jul1998, Vol. 105 Issue 1-2, p343. 0p.
Subject Terms: *Atmospheric deposition, *Biogeochemistry, *Sulfur
Geographic Terms: Ontario, Canada
Abstract: We monitored the chemistry of 603 small water bodies in three acid-sensitive regions of central Ontario, Canada (Algoma n=235, Muskoka n=216, Sudbury n=152) between 1988-1996 to determine whether they have responded to recent SO2 emission reductions, and whether any chemical changes were related to lake characteristics. During the study, 27-56 % of lakes declined in SO42- concentrations, 41-57 % declined in base cation concentrations, but only 26-28 % increased in pHor ANC (acidity status). Increases in pH were greatest in lakes withlow ANC, but had weak relationships to lake color or volume. No consistent trends were observed for DOG, NO3--N or TP concentrations. Clearly, the long-term biological recovery of these sensitive aquatic ecosystems will depend on interactions among several environmental stressors, including acidification. [ABSTRACT FROM AUTHOR]
Copyright of Water, Air & Soil Pollution is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: *<searchLink fieldCode="DE" term="%22Atmospheric+deposition%22">Atmospheric deposition</searchLink><br />*<searchLink fieldCode="DE" term="%22Biogeochemistry%22">Biogeochemistry</searchLink><br />*<searchLink fieldCode="DE" term="%22Sulfur%22">Sulfur</searchLink>
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  Data: We monitored the chemistry of 603 small water bodies in three acid-sensitive regions of central Ontario, Canada (Algoma n=235, Muskoka n=216, Sudbury n=152) between 1988-1996 to determine whether they have responded to recent SO2 emission reductions, and whether any chemical changes were related to lake characteristics. During the study, 27-56 % of lakes declined in SO42- concentrations, 41-57 % declined in base cation concentrations, but only 26-28 % increased in pHor ANC (acidity status). Increases in pH were greatest in lakes withlow ANC, but had weak relationships to lake color or volume. No consistent trends were observed for DOG, NO3--N or TP concentrations. Clearly, the long-term biological recovery of these sensitive aquatic ecosystems will depend on interactions among several environmental stressors, including acidification. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Water, Air & Soil Pollution is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Jul1998
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