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| Titel |
Spatial distribution and sources of organic carbon in the surface sediment of Bosten Lake, China |
| VerfasserIn |
Z. T. Yu, X. J. Wang, E. L. Zhang, C. Y. Zhao, X. Q. Liu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 12, no. 22 ; Nr. 12, no. 22 (2015-11-19), S.6605-6615 |
| Datensatznummer |
250118170
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| Publikation (Nr.) |
 copernicus.org/bg-12-6605-2015.pdf |
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| Zusammenfassung |
| Lake sediment is an important carbon reservoir. However, little is known on
the dynamics and sources of sediment organic carbon in Bosten Lake. We
collected 13 surface (0–2 cm) sediment samples in Bosten Lake and
analyzed total organic carbon (TOC), total nitrogen (TN), stable carbon
isotopic composition in TOC (δ13Corg), and grain size. We
found a large spatial variability in TOC content (1.8–4.4 %) and δ
13Corg value (−26.77 to −23.98 ‰). Using a three-end-member mixing model with measured TOC : TN ratio and
δ13Corg, we estimated that 54–90 % of TOC was from
autochthonous sources. Higher TOC content (> 3.7 %) was found
in the east and central-north sections and near the mouth of the Kaidu River,
which was attributable to allochthonous, autochthonous plus allochthonous,
and autochthonous sources, respectively. The lowest TOC content was found in
the mid-west section, which might be a result of high kinetic energy levels.
Our study indicated that the spatial distribution of sediment TOC in the
Bosten Lake was influenced by multiple and complex processes. |
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