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Projects / Programmes source: ARIS

Degradation of sedimentary organic matter in coastal waters (Gulf of Trieste, northern Adriatic) and alpine lake (lake Bled)

Research activity

Code Science Field Subfield
1.03.03  Natural sciences and mathematics  Biology  Ecosystems 

Code Science Field
B260  Biomedical sciences  Hydrobiology, marine biology, aquatic ecology, limnology 
Keywords
organic matter, degradation, sediments, northern Adriatic, alpine lake
Evaluation (rules)
source: COBISS
Researchers (10)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  18333  Mira Avčin    Researcher  2000 - 2001 
2.  04650  PhD Oliver Bajt  Control and care of the environment  Researcher  1999 - 2001  430 
3.  18212  Vladimir Bernetič    Researcher  1998 - 2001  115 
4.  05249  PhD Jadran Faganeli  Control and care of the environment  Head  1996 - 2001  571 
5.  18335  Janez Forte  Biology  Researcher  1996 - 2001  77 
6.  18340  Alma Hvala    Researcher  1996 - 2001 
7.  18336  Silva Maslo    Researcher  1996 - 2001 
8.  11084  Radovan Planinc  Chemistry  Researcher  1996 - 2001  27 
9.  05251  PhD Borut Vrišer  Biology  Researcher  1996 - 2001  93 
10.  00757  PhD Aleksander Vukovič  Biology  Researcher  1996 - 2001  140 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0105  National Institute of Biology  Ljubljana  5055784  13,267 
Abstract
The kinetics of anoxic degradation of sedimentary organic matter in the Gulf of Trieste (northern Adriatric) and Lake Bled at different temperatures showed that the degradation proceeds mostly in surficial layer, sulphate reduction being the most important pathway in marine and methanogenesis in lacustrine sediments. Fe in marine sediments is prevalently bonded into goethite and, thus, less suitable for microbial reduction, while phoshate is prevalently adsorbed onto surfaces of Fe oxides. Methylation of Hg and demethylation of MeHg in sediments of the Gulf of Trieste proceed most actively in surficial sedimentary layer. The produced MeHg is diffusing to the sea water column entering the food web while mostly oxic demethylation is transforming CH3 to CO2. The paleoenvironmental research in the Holocene in Gulf of Trieste has shown the highest Corg. content in the allochthonous layer 14Corg. dated to 8000-9000 years BP. The heterogenous (TiO2) photocatalytic degradation of macroaggregates is a successful degradation pathway of mucillage in the water column of the northern Adriatic.
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