Anthropogenic oligotrophication via liming: Long-term phosphorus trends in acidified, limed, and neutral reference lakes in SwedenReport as inadecuate




Anthropogenic oligotrophication via liming: Long-term phosphorus trends in acidified, limed, and neutral reference lakes in Sweden - Download this document for free, or read online. Document in PDF available to download.

AMBIO

, Volume 43, Supplement 1, pp 104–112

First Online: 15 November 2014

Abstract

Restoration of acidified lakes by liming does not, in many cases, improve productivity to a pre-acidified state. We hypothesize that the poor recovery detected in many of these lakes is due to constrained in-lake phosphorous P cycling caused by enhanced precipitation of metals in higher pH, limed waters. Long-term 1990–2012 data for 65 limed, circum-neutral pH 6–8, and acidified lakes in Sweden were analyzed to determine trends for P and potential drivers of these trends. Limed lakes not only had lower mean values and stronger decreasing trends for total P than non-limed lakes, but they also had the highest percentage of decreasing trends 85 %. A P release factor Hypolimnetic P-Epilimnetic P was developed to elucidate differences in internal P cycling between lake groups. Consistently, lower P release factors in limed lakes show limitation of internal P cycling during summer months that may be a factor limiting P bioavailability and thus productivity of these systems.

KeywordsProductivity Liming Sediment Phosphorus Metal precipitation Acidified lakes Electronic supplementary materialThe online version of this article doi:10.1007-s13280-014-0573-0 contains supplementary material, which is available to authorized users.

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Author: Qian Hu - Brian J. Huser

Source: https://link.springer.com/



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