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Nitrogen and carbon interactions between boreal soils and lakes
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2010 (English)In: Global Biogeochemical Cycles, ISSN 0886-6236, E-ISSN 1944-9224, Vol. 24, no 4, GB4011- p.Article in journal (Refereed) Published
Abstract [en]

In this study, we used a large data set on nitrogen (N) and carbon (C) from Swedish boreal soils and lake waters to investigate N and C interactions between soils and lake waters. To link thousands of soils sites with hundreds of lake sites distributed all over Sweden, we gridded the data and found a significant relation between gridded C:N ratios of the organic soil layer and the ones of lake waters. We also found evidence of N deposition having depressed the C:N ratios of lake waters more than the ones of organic soil layers. In lake waters N strongly increased toward southern Sweden, mainly in the form of nitrate-nitrogen (NO3--N) which we primarily attribute to an increased NO3--N input from the boreal soils into the lakes. In contrast to N we found a much weaker direct relationship for C between soils and lake waters over Sweden. Instead, lake C was strongly related to lake morphometry and catchment characteristics. Our results indicate that large-scale variations in soil C content are not directly linked to C concentrations in lake waters, whereas soil N seems to leach in small amounts from the soils directly into the lakes in form of NO3--N. Such differences in N and C interactions between soils and lake waters give important insights into the global biogeochemical cycling of N and C.

Place, publisher, year, edition, pages
2010. Vol. 24, no 4, GB4011- p.
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-147124DOI: 10.1029/2009GB003668ISI: 000283942700002OAI: oai:DiVA.org:uu-147124DiVA: diva2:399898
Available from: 2011-02-24 Created: 2011-02-24 Last updated: 2017-12-11

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Weyhenmeyer, Gesa A.

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