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Multi-component carbon isotope evidence of early Holocene environmental change and carbon-flow pathways from a hard-water lake in northern Sweden

Hammarlund, Dan LU ; Aravena, R; Barnekow, Lena LU ; Buchardt, B and Possnert, G (1997) In Journal of Paleolimnology 18(3). p.219-233
Abstract
A 9000-year carbonate-rich sediment sequence from a small hard-water lake in northernmost Sweden was studied by means of multi-component stable carbon isotope analysis. Radiocarbon dating of different sediment fractions provides chronologic control and reveals a rather constant hard-water effect through time, suggesting lake has remained hydrologically open throughout the Holocene. Successive depletion of C-13 in fine-grained calcite and carbonate shells during the early Holocene correlate with a change in catchment vegetation from pioneer herb communities to boreal forest. The vegetational change and associated soil development likely gave rise to an increased supply of C-13-depleted carbon dioxide in groundwater recharging the lake. This... (More)
A 9000-year carbonate-rich sediment sequence from a small hard-water lake in northernmost Sweden was studied by means of multi-component stable carbon isotope analysis. Radiocarbon dating of different sediment fractions provides chronologic control and reveals a rather constant hard-water effect through time, suggesting lake has remained hydrologically open throughout the Holocene. Successive depletion of C-13 in fine-grained calcite and carbonate shells during the early Holocene correlate with a change in catchment vegetation from pioneer herb communities to boreal forest. The vegetational change and associated soil development likely gave rise to an increased supply of C-13-depleted carbon dioxide in groundwater recharging the lake. This process is therefore believed to be the main cause of decreasing values of delta(13)C in dissolved inorganic carbon of the lake and thereby in limnic carbonates. Strongly C-13-depleted sedimentary organic matter may be related to enhanced kinetic fractionation during photosynthetic assimilation by means of proton pumping in Characean algae. This interpretation is supported by a substantial offset between delta(13)C of DIC as recorded by mollusc shells and delta(13)C Of fine-grained calcite. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
northern Sweden, stable carbon isotopes, carbon isotope fractionation, limnic sediments, Holocene, lake
in
Journal of Paleolimnology
volume
18
issue
3
pages
219 - 233
publisher
Springer
external identifiers
  • wos:A1997YD26300002
  • scopus:0030665880
ISSN
0921-2728
DOI
10.1023/A:1007953614927
language
English
LU publication?
yes
id
45e52c33-8ca6-4823-a171-f3897030d116 (old id 4157608)
date added to LUP
2013-11-21 10:37:00
date last changed
2017-11-05 04:24:47
@article{45e52c33-8ca6-4823-a171-f3897030d116,
  abstract     = {A 9000-year carbonate-rich sediment sequence from a small hard-water lake in northernmost Sweden was studied by means of multi-component stable carbon isotope analysis. Radiocarbon dating of different sediment fractions provides chronologic control and reveals a rather constant hard-water effect through time, suggesting lake has remained hydrologically open throughout the Holocene. Successive depletion of C-13 in fine-grained calcite and carbonate shells during the early Holocene correlate with a change in catchment vegetation from pioneer herb communities to boreal forest. The vegetational change and associated soil development likely gave rise to an increased supply of C-13-depleted carbon dioxide in groundwater recharging the lake. This process is therefore believed to be the main cause of decreasing values of delta(13)C in dissolved inorganic carbon of the lake and thereby in limnic carbonates. Strongly C-13-depleted sedimentary organic matter may be related to enhanced kinetic fractionation during photosynthetic assimilation by means of proton pumping in Characean algae. This interpretation is supported by a substantial offset between delta(13)C of DIC as recorded by mollusc shells and delta(13)C Of fine-grained calcite.},
  author       = {Hammarlund, Dan and Aravena, R and Barnekow, Lena and Buchardt, B and Possnert, G},
  issn         = {0921-2728},
  keyword      = {northern Sweden,stable carbon isotopes,carbon isotope fractionation,limnic sediments,Holocene,lake},
  language     = {eng},
  number       = {3},
  pages        = {219--233},
  publisher    = {Springer},
  series       = {Journal of Paleolimnology},
  title        = {Multi-component carbon isotope evidence of early Holocene environmental change and carbon-flow pathways from a hard-water lake in northern Sweden},
  url          = {http://dx.doi.org/10.1023/A:1007953614927},
  volume       = {18},
  year         = {1997},
}