Dynamics in composition and size-class distribution of humic substances in profundal sediments of Lake Constance

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2001
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Kappler, Andreas
Ji, Rong
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Zusammenfassung

Organic matter from profundal lake sediments was fractionated and analyzed with high depth resolution, and the size-class distribution of humic substances was determined by gel-permeation chromatography. Together with a depth- dependent increase of the thermal stability of the organic matter and an increasing C/N atomic ratio of the humic acids, the size-distribution patterns of di erent fractions indicated an increasing degree of humification with depth. The main stabilization processes occurred in the surface layer (0±2 cm depth), which is clearly distinguished from the deeper sediment. The depth profiles also indicated that humification in lake sediments consists of simultaneous degradation and polymerization processes.

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570 Biowissenschaften, Biologie
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Lake sediment, Size-class distribution, Humic substances, Humification processes
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ISO 690KAPPLER, Andreas, Rong JI, Bernhard SCHINK, Andreas BRUNE, 2001. Dynamics in composition and size-class distribution of humic substances in profundal sediments of Lake Constance. In: Organic Geochemistry. 2001, 32(1), pp. 3-10. ISSN 0146-6380. Available under: doi: 10.1016/S0146-6380(00)00160-1
BibTex
@article{Kappler2001Dynam-7508,
  year={2001},
  doi={10.1016/S0146-6380(00)00160-1},
  title={Dynamics in composition and size-class distribution of humic substances in profundal sediments of Lake Constance},
  number={1},
  volume={32},
  issn={0146-6380},
  journal={Organic Geochemistry},
  pages={3--10},
  author={Kappler, Andreas and Ji, Rong and Schink, Bernhard and Brune, Andreas}
}
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