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Organic carbon characteristics in Swedish forest soil trace post-depositional carbon dynamics
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
University of Florida, FL 32611 USA.
University of Florida, FL 32611 USA.
Stockholm University, Sweden.
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2016 (English)In: European Journal of Soil Science, ISSN 1351-0754, E-ISSN 1365-2389, Vol. 67, no 4, 492-503 p.Article in journal (Refereed) Published
Abstract [en]

We investigated soil organic carbon (SOC) characteristics in three forests along a north-south transect in Sweden where these forest types cover about 69% of the landscape. There was variation in C-14 ages, and the median ages ranged from about 25 to amp;gt; 2500 cal BP in SOC. Although total SOC and nitrogen (N) contents decreased, stable carbon isotope and humification indices increased with depth. These progressive changes with depth and age were related to degradation. The delta C-13 values and specific biomarkers indicated that organic carbon was primarily from C-3 plants. Biomarkers were effective in distinguishing OC input from specific sources (i.e. angiosperms, gymnosperms and grasses). A sharp decrease in biomarkers with depth indicated degradation of OC in the upper soil horizon, and limited contribution in the subsoil towards the stabilization of SOC. The sharp decrease in carbon stocks and C-14 age in the soil OC pool with increasing soil depth, and quite large values for the percentage of modern carbon, suggested a decrease in SOC pools. Overall, these results showed that carbon sequestration in high latitude forests was small, and their role as potential carbon sinks needs to be reassessed.

Place, publisher, year, edition, pages
WILEY-BLACKWELL , 2016. Vol. 67, no 4, 492-503 p.
National Category
Soil Science
URN: urn:nbn:se:liu:diva-132493DOI: 10.1111/ejss.12358ISI: 000384745900013OAI: diva2:1046254

Funding Agencies|Swedish Research Council [2002-3712]

Available from: 2016-11-13 Created: 2016-11-12 Last updated: 2016-11-13

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Routh, Joyanto
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Tema Environmental ChangeFaculty of Arts and Sciences
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