Article (Scientific journals)
Experimental Evidence of Large Changes in Terrestrial Chlorine Cycling Following Altered Tree Species Composition
Montelius, Malin; Thiry, Yves; Marang, Laura et al.
2015In Environmental Science and Technology, 49, p. 4921-4928
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Abstract :
[en] Organochlorine molecules (Clorg) are surprisingly abundant in soils and frequently exceed chloride (Cl−) levels. Despite the widespread abundance of Clorg and the common ability of microorganisms to produce Clorg, we lack fundamental knowledge about how overall chlorine cycling is regulated in forested ecosystems. Here we present data from a long-term reforestation experiment where native forest was cleared and replaced with five different tree species. Our results show that the abundance and residence times of Cl− and Clorg after 30 years were highly dependent on which tree species were planted on the nearby plots. Average Cl− and Clorg content in soil humus were higher, at experimental plots with coniferous trees than in those with deciduous trees. Plots with Norway spruce had the highest net accumulation of Cl− and Clorg over the experiment period, and showed a 10 and 4 times higher Cl− and Clorg storage (kg ha−1) in the biomass, respectively, and 7 and 9 times higher storage of Cl− and Clorg in the soil humus layer, compared to plots with oak. The results can explain why local soil chlorine levels are frequently independent of atmospheric deposition, and provide opportunities for improved modeling of chlorine distribution and cycling in terrestrial ecosystems.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Montelius, Malin
Thiry, Yves
Marang, Laura
Ranger, Jacques
Cornelis, Jean-Thomas ;  Université de Liège > Ingénierie des biosystèmes (Biose) > Echanges Eau-Sol-Plantes
Svensson, Teresia
Bastviken, David
Language :
English
Title :
Experimental Evidence of Large Changes in Terrestrial Chlorine Cycling Following Altered Tree Species Composition
Publication date :
2015
Journal title :
Environmental Science and Technology
ISSN :
0013-936X
eISSN :
1520-5851
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
49
Pages :
4921-4928
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 June 2015

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