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Water chemistry in 179 randomly selected Swedish headwaterstreams related to forest production, clear-felling and climate
Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden .
Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden .
Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics. (Mathematical Statistics ; Arcum)
Geological Survey of Sweden, Uppsala, Sweden.
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2014 (English)In: Environmental Monitoring & Assessment, ISSN 0167-6369, E-ISSN 1573-2959, 1-22 p.Article in journal (Refereed) Published
Abstract [en]

From a policy perspective, it is important to understand forestry effects on surface waters from a landscape perspective. The EU Water Framework Directive demands remedial actions if not achieving good ecological status. In Sweden, 44 % of the surface water bodies have moderate ecological status or worse. Many of these drain catchments with a mosaic of managed forests. It is important for the forestry sector and water authorities to be able to identify where, in the forested landscape, special precautions are necessary. The aim of this study was to quantify the relations between forestry parameters and headwater stream concentrations of nutrients, organic matter and acid-base chemistry. The results are put into the context of regional climate, sulphur and nitrogen deposition, as well as marine influences. Water chemistry was measured in 179 randomly selected headwater streams from two regions in southwest and central Sweden, corresponding to 10 % of the Swedish land area. Forest status was determined from satellite images and Swedish National Forest Inventory data using the probabilistic classifier method, which was used to model stream water chemistry with Bayesian model averaging. The results indicate that concentrations of e.g. nitrogen, phosphorus and organic matter are related to factors associated with forest production but that it is not forestry per se that causes the excess losses. Instead, factors simultaneously affecting forest production and stream water chemistry, such as climate, extensive soil pools and nitrogen deposition, are the most likely candidates The relationships with clear-felled and wetland areas are likely to be direct effects.

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2014. 1-22 p.
Keyword [en]
water chemistry, headwater streams, boreal landscape, forestry, representative sampling, probabilistic classifying
National Category
Oceanography, Hydrology, Water Resources Probability Theory and Statistics Climate Research Forest Science
URN: urn:nbn:se:umu:diva-94424DOI: 10.1007/s10661-014-4054-5OAI: diva2:753786
Swedish Environmental Protection AgencySwedish Energy Agency
Available from: 2014-10-09 Created: 2014-10-09 Last updated: 2016-05-20Bibliographically approved

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