Fustec, Eliane and Chauvet, Eric and Gas, Gilbert and Lacaze, Daniel and Escautier, Michèle Degradation of softwood [14C lignin] lignocelluloses and its relation to the formation of humic substances in river and pond environments. (1988) Hydrobiologia, 159 (2). 169-176. ISSN 1573-5117
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(Document in English)
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Official URL: http://link.springer.com/article/10.1007%2FBF00014725
Abstract
The fate of lignin in water and sediment of the Garonne river (France) and of a pond in its floodplain was examined using specifically labeled [14C-lignin] lignocelluloses. No significant differences appeared in the mineralization rate of alder, poplar or willow [14C-lignin] in running water samples. Conversion of total radi- oactivity to 14C02 ranged between 18.7 and 24.4% after 120 days of incubation. Degree of 14C-Iabeled lig- nin mineralization in standing water and sediments was clearly lower, especially in submerged sediments, and was correlated with oxygen supply. After 60 days of incubation 3.3% to 7.9% of the 14C-Iabeled lignin was recovered in water samples as dissolved organic carbon originating from microbial metabolism. In water ex- tracts from sediment the percentage of dissolved organic 14C was only 0.4% to 1.3% of the applied activity. In the humic fraction extracted from sediments it did not exceed 4.4% which was much lower than in soils. No significant difference appeared between river and pond conditions for humic substances formation.
Item Type: | Article |
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Additional Information: | Thanks to Springer Link. The definitive version is available at http://www.springerlink.com The original PDF of the article can be found at : http://link.springer.com/article/10.1007%2FBF00014725 |
Audience (journal): | International peer-reviewed journal |
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Institution: | French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) |
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Deposited On: | 30 Nov 2015 10:00 |
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