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Is chloride a conservative ion in forest ecosystems?
2012 (English)In: Biogeochemistry, ISSN 0168-2563, E-ISSN 1573-515X, Vol. 107, no 1-3, 125-134Article in journal (Refereed) Published
Abstract [en]

Chloride (Cl-) has often been assumed to be relatively unreactive in forest ecosystems, and is frequently used as a conservative tracer to calculate fluxes of water and other ions. Recently, however,several studies have detailed cycling of Cl- invegetation and soils. In this study Cl- budgets arecompiled from 32 catchment studies to determine the extent to which Cl- is conserved in the passage through forest ecosystems. Chloride budgets fromthese sites vary from net retention (input/output) tonet release (output/input). In the overall data set, including those sites with very high inputs of seasaltCl-, there was a strong correspondence betweeninputs and outputs. However, sites with low Cl- deposition (<6 kg ha-1 year-1) consistently showednet release of Cl-, suggesting an internal source or adeclining internal pool. The results indicate that Cl- may be a conservative ion in sites with high Cl- deposition, but in sites with low deposition Cl- may not be conservative. We discuss the possible causes of the Cl- imbalance and reasons why Cl- may not be conservative in ecosystem functions.

Keyword [en]
Catchment, Chloride, Chlorine, Mass balance, Soil, Tracer, Watershed
National Category
Environmental Sciences
URN: urn:nbn:se:liu:diva-71914DOI: 10.1007/s10533-010-9538-yISI: 000298226700009OAI: diva2:455312
funding agencies|Swedish Foundation for International Cooperation in Research and Education (STINT)||US National Science Foundation| DEB-0342198 DEB-0423259 |Hubbard Brook LTER program||Andrew W. Mellon Foundation||Available from2011-11-09 Created:2011-11-09 Last updated:2013-12-17

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Svensson, TeresiaLovett, GaryLikens, Gene E
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Department of Water and Environmental StudiesFaculty of Arts and Sciences
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