Water, Air, & Soil Pollution: Focus

, Volume 7, Issue 1–3, pp 331–338

A Novel Environmental Quality Criterion for Acidification in Swedish Lakes – An Application of Studies on the Relationship Between Biota and Water Chemistry

  • Jens Fölster
  • Cecilia Andrén
  • Kevin Bishop
  • Ishi Buffam
  • Neil Cory
  • Willem Goedkoop
  • Kerstin Holmgren
  • Richard Johnson
  • Hjalmar Laudon
  • Anders Wilander
Article

DOI: 10.1007/s11267-006-9075-9

Cite this article as:
Fölster, J., Andrén, C., Bishop, K. et al. Water Air Soil Pollut: Focus (2007) 7: 331. doi:10.1007/s11267-006-9075-9

Abstract

The recovery from acidification has led to the demand for more precise criteria for classification of acidification. The Swedish Environmental Protection Agency has revised Sweden’s Ecological Quality Criteria for acidification to improve the correlation between the chemical acidification criteria and biological effects. This paper summarises the most relevant findings from several of the studies commissioned for this revision. The studies included data on water chemistry in 74 reference lakes in southern Sweden with data on fish in 61 of the lakes, as well as data on littoral fauna in 48 lakes. We found that the acidity variable most strongly correlated to the biota was the median pH from the current year. Our results probably do not reflect the mechanisms behind the negative effects of acidity on the biota, but are fully relevant for evaluation of monitoring data. The biogeochemical models used for predicting acidification reference conditions generate a pre-industrial buffering capacity. In order to get an ecologically more relevant criteria for acidification based on pH, we transferred the estimated change in buffering capacity into a corresponding change in pH. A change of 0.4 units was defined as the threshold for acidification. With this criterion a considerably lower number of Swedish lakes were classified as acidified when compared with the present Ecological Quality Criteria.

Keywords

fish monitoring littoral fauna water chemistry 

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Jens Fölster
    • 1
  • Cecilia Andrén
    • 2
  • Kevin Bishop
    • 1
  • Ishi Buffam
    • 3
  • Neil Cory
    • 4
  • Willem Goedkoop
    • 1
  • Kerstin Holmgren
    • 5
  • Richard Johnson
    • 1
  • Hjalmar Laudon
    • 6
  • Anders Wilander
    • 1
  1. 1.Department of Environmental AssessmentSLUUppsalaSweden
  2. 2.Department of Applied Environmental ScienceStockholm University, ITMStockholmSweden
  3. 3.Department of Forest EcologySLUUmeåSweden
  4. 4.Forest Resource Management and GeomaticsSLUUmeåSweden
  5. 5.National Board of FisheriesDrottningholmSweden
  6. 6.Department of Ecology and Environmental SciencesUmeå UniversityUmeåSweden

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