uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Widespread release of dissolved organic carbon from anoxic boreal lake sediments
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology.ORCID iD: 0000-0003-1351-9277
2017 (English)In: INLAND WATERS, ISSN 2044-2041, E-ISSN 2044-205X, Vol. 7, no 2, p. 151-163Article in journal (Refereed) Published
Abstract [en]

Sediments in boreal lakes are important components of the carbon cycle because they receive and store large amounts of organic carbon (OC) and at the same time are a source of greenhouse gases. Under anoxic conditions, sediment OC can be lost through dissolution from the solid phase and subsequent diffusion to the water column. Although this process may have implications for sediment OC budgets, it has yet to be studied systematically. We combined laboratory sediment incubation experiments from 4 boreal lakes in central Sweden that differed widely in their biogeochemical conditions with data from the Swedish monitoring program covering >100 lakes to analyze the frequency of occurrence of sediment DOC loss in boreal lakes and identify lake characteristics and the conditions related to high DOC fluxes from anoxic sediments. We found DOC diffusion from anoxic sediments in all the anoxic sediment incubations but at different mean rates (0.7-3.7 mmol m(-2) d(-1)). Similarly, 16 of 17 of the monitoring lakes that developed anoxic bottom water exhibited an increase in bottom-water DOC concentration, corresponding to a mean (and standard deviation) DOC diffusion flux from anoxic sediment of 11.1 (35.4) mmol m(-2) d(-1). The observed variability between lakes was related to particularly large DOC fluxes in humic-rich lakes, which we attribute to their low pH and high share of terrestrial OC favoring the formation of OC-iron aggregates. Accordingly, increasing pH might facilitate the dissolution of sediment OC because high dissolved OC fluxes from anoxic sediments were accompanied by high microbial iron and sulfate reduction, resulting in concomitant pH increase.

Place, publisher, year, edition, pages
FRESHWATER BIOLOGICAL ASSOC , 2017. Vol. 7, no 2, p. 151-163
Keywords [en]
Anoxia, boreal lakes, iron, organic carbon, reductive dissolution, sediment diffusion
National Category
Environmental Sciences Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-334511DOI: 10.1080/20442041.2017.1300226ISI: 000408584600003OAI: oai:DiVA.org:uu-334511DiVA, id: diva2:1165935
Available from: 2017-12-14 Created: 2017-12-14 Last updated: 2018-05-18Bibliographically approved

Open Access in DiVA

Peter_etal_2017_Inland_Waters_preprint(1019 kB)1 downloads
File information
File name FULLTEXT01.pdfFile size 1019 kBChecksum SHA-512
1fc313555e03ad9d7f49c277e3cb081cbe1fe9412ae865381b21f6e1f0c0eac20b67903dbf9f4936c24f1c1395eeb51a6255f74aad07a15201bd10eee06a26db
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Peter, SimoneSobek, Sebastian

Search in DiVA

By author/editor
Peter, SimoneSobek, Sebastian
By organisation
Limnology
In the same journal
INLAND WATERS
Environmental SciencesBiological Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 1 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 33 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf