Naslov
Nutrients ratio trends in the northern Adriatic Sea and their potential effects on the ecosystem

Autori
Giani, Michele ; Djakovac, Tamara ; Precali, Robert ; Supić, Nastjenjka ; Marić Pfannkuchen, Daniela ; Godrijan, Jelena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, pp prezentacija, znanstveni

Skup
Integrated Marine Biogeochemistry and Ecosystem Research - IMBER IMBIZO IV

Mjesto i datum
Trst, Italija, 26.10.2015. - 30.10.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Nutrients; Phytoplankton; Low Oxygen; Long-term changes; Po River; northern Adroatic

Sažetak
Long-term changes of oceanographic characteristics of the northern Adriatic (NAd) derive from combined effects of the climate oscillations and anthropogenic impact on the biotic components. Time series of oceanographic parameters collected in the period 1977-2014 at stations, under different eutrophic pressures of Rovinj-Po River Delta transect, were statistically analyzed. Furthermore, the variation in nutrient discharge carried by Po river was taken into account. In fact, significantly negative trend of total phytoplankton abundance were evidenced at most stations, and in addition significantly negative trend of diatoms in the bottom layer in spring on more oligotrophic eastern NAd was observed. The recently detected trends in the NAd were directly related to the increased Po River freshwater inflow in period 2009-2014 compared to the drought years. The increasing N/P ratio and decreasing silicate concentrations could have marked effects on the phytoplankton and macrophytes distribution/structure in the NAd, affecting the overall trophic status.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Biologija

POVEZANOST RADA