Naslov
Long-term impact of riverine discharges and nutrients loads in the northern Adriatic Sea
(Seventh European Phycological Congress)

Autori
Giani, Michele ; Djakovac, Tamara

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Keynote and Oral Papers, European Journal of Phycology / Bosak, Sunčica ; Ljubešić, Zrinka - Zagreb : Informa UK Limited, 2019, 95-96

Skup
7th European Phycological Congress

Mjesto i datum
Zagreb, Hrvatska, 25.08.2019. - 30.08.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
nutrients ; riverine inputs ; trophic status ; northern Adriatic

Sažetak
The freshwaters discharged in the Adriatic Sea account for about 38% of the total freshwaters discharged in the Mediterranean. The northern Adriatic (NAd) rivers contribute 54% of the total freshwater discharged in the Adriatic. The Po River and other NE rivers carry relevant loads of particulate matter, dissolved organic matter and nutrients which strongly affect the trophic status of the NAd waters. Strong oscillations in the discharges occurred during the last decades which determined variations in the phytoplankton biomass abundance. The long-term discharge of Po freshwaters (1917-2017) is positively correlated with the meteorological variations at large scale (Western Mediterranean Oscillation Index) during the late spring-summer. The drought occurred in the mid 2000s determined a drastic reduction of chlorophyll concentrations in the NAd which recovered in the years 2010, 2013 and 2014. A load of P after the peak in the late 1980s revealed a decreasing trend due to the ban of P in detergents and lower use in agriculture, whereas the NO3 load remained elevated. Accordingly, nutrient concentrations in seawater (1972-2017) monitored along the transect Rovinj-Po River mouth, the NAd evidenced PO4 decreasing and NO3 increasing trends at most stations as well as an elevated NO3/PO4 ratio. Overall notwithstanding the recent increase of the discharges the chlorophyll a shows a long-term decreasing trend.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biologija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA