Naslov
Development of anoxia in the small coastal sea lake, Rogoznica lake (eastern Adriatic coast)
(Development of anoxia in the small coastal sea lake, Rogoznica lake (eastern Adriatic coast).)

Autori
Ciglenečki, Irena ; Kodba, Zvonimir ; Viličić, Damir ; Carić, Marina ; Ćosović, Božena

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Rapport du 35e Congres de la Commission Internationale pour l' Exploration Scientifique de la Mer Mediterranee / Maldonado, A. ; Millot, C. ; Fowler, S. ; Gutnick, D. - Monte Carlo : Commission Internationale pour l'exploration scientifique de la Mer Mediterranee, 1998, 242-243

Skup
Congres de la Commission Internationale pour l' Exploration Scientifique de la Mer Mediterranee (35 ; 1998)

Mjesto i datum
Dubrovnik, Hrvatska, 01.06.1998. - 05.06.1998

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
organic matter; phytoplankton; sulphur; sulphide; oxygen; anoxic conditions; halocline

Sažetak
Variations of temperature, salinity and concentration of dissolved oxygen, as well as vertical distribution of dissolved organic matter (DOC), surface active substances (SAS), phytoplankton, nutrients (NH4, NO3, NO2, PO4, SiO4) and reduced sulfur compounds in the small, intensely eutrophicated, 15 m deep sea-lake, Rogoznica Lake, have been investigated during different seasons in 1996. Anoxic conditions in the lake and high concentration of sulfur compounds (up to 10^-4M, mainly in the form of sulfide) were detected below 12 m depth during periods of stable stratification. Also, at the same time below 10 m depth, relatively high concentrations of organic matter (SAS up to 0.3 mg dm^-3 equv. Triton-X-100, DOC up to 0.22 mM), SiO_4^4- (up to 112 microM) and PO_4^3- (up to 1.9 microM) were detected, indicating the start of more pronounced remineralization. The stratification and mixing of lake water in 1996 were greatly influenced by rainfall as shown from decreased salinity in deeper waters. During the spring 1996 high phytoplankton activity over the entire water column and extremely high production of oxygen (oxygen saturation uop to 300%) probably prevented the expected development of anioxia from occuring.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija, Biologija

POVEZANOST RADA