Dissolved organic carbon variability in a shallow coastal marine system (Gulf of Trieste, northern Adriatic Sea)

2008 ◽  
Vol 78 (2) ◽  
pp. 280-290 ◽  
Author(s):  
Cinzia De Vittor ◽  
Alessandro Paoli ◽  
Serena Fonda Umani
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Adriatic Sea ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Gulf Of Trieste ◽  
Coastal Marine ◽  
Marine System

scholarly journals Dissolved organic carbon and surface active substances in the northern Adriatic Sea: Long-term trends, variability and drivers

2020 ◽  
Vol 730 ◽  
pp. 139104
Author(s):  
Irena Ciglenečki ◽  
Ivica Vilibić ◽  
Jelena Dautović ◽  
Vjeročka Vojvodić ◽  
Božena Ćosović ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Adriatic Sea ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Long Term Trends ◽  
Surface Active ◽  
Active Substances

Oxic - anoxic transition of benthic fluxes from the coastal marine environment (Gulf of Trieste, northern Adriatic Sea)

2009 ◽  
Vol 60 (7) ◽  
pp. 700 ◽  
Author(s):  
Jadran Faganeli ◽  
Nives Ogrinc
Keyword(s):  
Adriatic Sea ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
Sedimentary Environments ◽  
Gulf Of Trieste ◽  
Coastal Marine ◽  
Incubation Experiments ◽  
O2 Concentration ◽  
Recovery Response ◽  
Dissolved O2

The influence of O2 concentration on mineralisation processes was examined by sediment incubation experiments under controlled laboratory conditions over a sequence of oxic, anoxic and then reoxidising conditions. Sediments were studied from five locations representing marine, lagoonal and brackish environments in the Gulf of Trieste (northern Adriatic Sea). A complete depletion of dissolved O2 and nitrate were observed after ~6 –15 days in marine and lagoonal sediments, and after 5 days in brackish sediments. During the reoxygenation phase, nitrification occurred at some sites, as evidenced by increases in NO3– concentrations, but not at other sites, indicating an inhibited recovery response to intermittent oxic conditions. NH4+ and PO43– regeneration during mineralisation was much more extensive in sediments overlain by oxygen-depleted waters, driving additional eutrophication. During reoxygenation, an influx of phosphate was observed in all three sedimentary environments, removing soluble phosphorus through coagulation and finally precipitation. Two degraded organic matter (OM) types could be distinguished: OM degraded under oxic conditions in marine and brackish sediments v. OM rapidly degraded under anoxic conditions in lagoon sediments.

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