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Contributions of terrestrial organic carbon to northern lake sediments
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Limnology, Department of Ecology and Genetics, Limnology, Uppsala University, Uppsala, Sweden. (Climate Impacts Research Centre (CIRC) ; Arcum)ORCID-id: 0000-0002-4949-9792
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2017 (engelsk)Inngår i: Limnology and Oceanography Letters, E-ISSN 2378-2242, Vol. 2, nr 6, s. 218-227Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Sediments of northern lakes sequester large amounts of organic carbon (OC), but direct evidence of the relative importance of their sources is lacking. We used stable isotope ratios of nonexchangeable hydrogen (δ2Hn) in topsoil, algae, and surface sediments in order to measure the relative contribution of terrestrial OC in surface sediments of 14 mountainous arctic and lowland boreal lakes in Sweden. The terrestrial contribution to the sediment OC pool was on average 66% (range 46–80) and similar between arctic and boreal lakes. Proxies for the supply of terrestrial and algal OC explained trends in the relative contribution of terrestrial OC across lakes. However, the data suggest divergent predominant sources for terrestrial OC of sediments in Swedish lakes, with dissolved matter dominating in lowland boreal lakes and particulate OC in mountainous arctic lakes.

sted, utgiver, år, opplag, sider
2017. Vol. 2, nr 6, s. 218-227
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URN: urn:nbn:se:umu:diva-142341DOI: 10.1002/lol2.10051Scopus ID: 2-s2.0-85050610090OAI: oai:DiVA.org:umu-142341DiVA, id: diva2:1160767
Tilgjengelig fra: 2017-11-28 Laget: 2017-11-28 Sist oppdatert: 2023-03-24bibliografisk kontrollert

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