Recent evolution of river discharges in the Gulf of Trieste and their potential response to climate changes and anthropogenic pressure

Cozzi, Stefano; Falconi, C.; Comici, Cinzia; Čermelj, Branko; Kovač, Nives; Turk, Valentina; Giani, Michele

doi:10.1016/j.ecss.2012.03.005

Cited by 81 publications

(52 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the shallow and semi‐enclosed Gulf of Trieste, low surface salinity and high surface nutrient concentrations coincided with sporadic higher freshwater inflows, mainly from the Isonzo River (Fig. , Supporting Information http://onlinelibrary.wiley.com/doi/10.1111/1462-2920.12519/suppinfo, as reported in Cozzi et al ., ). The increase of phytoplankton biomass (e.g.…”

Section: Discussionmentioning

confidence: 97%

“…The north‐eastern Adriatic continental shelf was proposed as a model area for the study of the importance of run‐off and of the supply of land‐born nutrients in a subtropical coastal ecosystem (Cozzi et al ., ). A recent review study on long‐term series on rivers discharges, oceanographic features, plankton, fish and benthic compartments revealed a significant change in mechanisms and trophic structures in this ecosystem (Giani et al ., ).…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Bacterial community shift is induced by dynamic environmental parameters in a changing coastal ecosystem (northern Adriatic, northeastern Mediterranean Sea) – a 2‐year time‐series study

Tinta

Vojvoda

Mozetič

et al. 2014

Environmental Microbiology

View full text Add to dashboard Cite

The potential link between the microbial dynamics and the environmental parameters was investigated in a semi-enclosed and highly dynamic coastal system (Gulf of Trieste, northern Adriatic Sea, NE Mediterranean Sea). Our comprehensive 2-year time-series study showed that despite the shallowness of this area, there was a significant difference between the surface and the bottom bacterial community structure. The bottom bacterial community was more diverse than the surface one and influenced by sediment re-suspension. The surface seawater temperature had a profound effect on bacterial productivity, while the bacterial community structure was more affected by freshwater-borne nutrients and phytoplankton blooms. Phytoplankton blooms caused an increase of Gammaproteobacteria (Alteromonadaceae, SAR86 and Vibrionaceae) and shift in dominance from SAR11 to Rhodobacteraceae taxon at the surface. Our results propose the importance of the water mass movements as drivers of freshwater-borne nutrients and of allochthonous microbial taxa. This study emphasizes the prediction power based on association networks analyses that are fed with long-term measurements of microbial and environmental parameters. These interaction maps offer valuable insights into the response of marine ecosystem to climate- and anthropogenic-driven stressors.

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Bacterial community shift is induced by dynamic environmental parameters in a changing coastal ecosystem (northern Adriatic, northeastern Mediterranean Sea) – a 2‐year time‐series study

Tinta

Vojvoda

Mozetič

et al. 2014

Environmental Microbiology

View full text Add to dashboard Cite

show abstract

“…The main circulation is cyclonic and the outflow of seawater mostly occurs along the shallow northern coast after mixing with river waters (Solidoro et al 2009). The Isonzo/Soča River enters at the northern part of the Gulf of Trieste and is the most significant source of freshwater and nutrients to the Gulf (Cozzi et al 2012). It has a length of 136 km with a drainage basin of 3,452 km 2 and an average flow of 149 m 3 s −1 (Szramek et al 2011).…”

Section: Study Sitementioning

confidence: 99%

“…They have smaller drainage basins with 212 and 91 km 2 , lengths of 14 and 27 km, respectively, and average flows of 4.0 and 1.1 m 3 s −1 , respectively. Both the Rižana and Dragonja rivers have an effect on primary production in the marine ecosystem due to their relatively significant input of terrestrial nutrients, especially nitrates and silica (Cozzi et al 2012;Tamše et al 2014). The Rižana features a karstic hinterland with a predominantly flysch area.…”

Section: Study Sitementioning

confidence: 99%

River Sources of Dissolved Inorganic Carbon in the Gulf of Trieste (N Adriatic): Stable Carbon Isotope Evidence

Tamše

Ogrinc

Walter

et al. 2014

Estuaries and Coasts

View full text Add to dashboard Cite

River inputs can significantly affect carbon dynamics in the costal ocean. Here, we investigate the influence of four rivers (Isonzo/Soča, Timavo/Reka, Rižana, and Dragonja) on inorganic carbon (C) in the Gulf of Trieste in the northern Adriatic Sea using stable isotope signatures of dissolved inorganic carbon (δ 13 C DIC ). In 2007, rivers exported 1.03×10 11 g C in the form of dissolved inorganic carbon (DIC) to the Gulf of Trieste with the lowest export observed in the Dragonja and the highest in the Isonzo/Soča. River plumes were associated with higher total alkalinity (TA) and pCO 2 values compared with Gulf of Trieste waters, but their inputs showed high spatial variability. The δ 13 C DIC values and the isotopic mass balance suggested that river input during the spring of 2007 represented about 16 % of DIC at our study site VIDA, located in the southeastern part of the Gulf of Trieste. During autumn of 2007, the riverine contribution of DIC was less pronounced (3 %) although the river export of C was higher relative to the spring season. Convective mixing with the Gulf of Trieste waters and bora wind events appear to reduce the riverine contribution to the DIC system. Our results suggest that river plumes play an important role in C cycling in the Gulf of Trieste by direct inputs of higher riverine DIC and by increased biological uptake of DIC promoted by the supply of riverine nutrients.

show abstract

“…Climatological annual precipitation amounts to approximately 1000 mm (1043 mm from Stravisi and Crisciani []; 973 mm from 1981 to 2010 data, available from the CNR‐ISMAR archives), with the minimum in January–February and the maximum in November. The mean river discharge rate into the gulf is estimated to be 114 m 3 s −1 over 1998–2008, due mainly to the Isonzo and Timavo rivers [ Cozzi et al ., ].…”

Section: Introductionmentioning

confidence: 99%

Extreme air-sea interactions in the Gulf of Trieste (North Adriatic) during the strong Bora event in winter 2012

Raicich

Malačič

Celio

et al. 2013

J. Geophys. Res. Oceans

View full text Add to dashboard Cite

[1] From late January to mid-February 2012 the Gulf of Trieste (North Adriatic Sea) was affected by a severe winter weather event characterized by cold air and strong northeasterly wind (Bora). The atmospheric forcing caused large surface heat fluxes which produced remarkable effects on the gulf, particularly the production of a very cold and dense water mass. Temperatures as low as 4 C were observed in the deepest part of the gulf, similar to that which was observed in winter 1929, which was probably the most severe winter in the region over more than a century. The density anomaly attained values up to 30.58 kg m À3 , even greater than in 1929. Surface heat fluxes were estimated using bulk formulas and the meteorological and marine observations available at three stations. Mean daily heat losses exceeded 1000 W m À2 . A comparison of this event with similar past events was made using proxy heat fluxes, available since 1978, to account for the air-sea interactions and using temperature and salinity observations, performed since 1996, to account for the effect of heat fluxes on ocean properties. The 2012 Bora episode turned out to be the most severe event of this kind in the Gulf of Trieste for at least the last 35 years and is comparable to that which occurred in 1929. A significant linear correlation was also found between the total surface heat loss and the density increase of the waters in the part of the gulf deeper than 20 m.Citation: Raicich, F

show abstract

Recent evolution of river discharges in the Gulf of Trieste and their potential response to climate changes and anthropogenic pressure

Cited by 81 publications

References 31 publications

Bacterial community shift is induced by dynamic environmental parameters in a changing coastal ecosystem (northern Adriatic, northeastern Mediterranean Sea) – a 2‐year time‐series study

Bacterial community shift is induced by dynamic environmental parameters in a changing coastal ecosystem (northern Adriatic, northeastern Mediterranean Sea) – a 2‐year time‐series study

River Sources of Dissolved Inorganic Carbon in the Gulf of Trieste (N Adriatic): Stable Carbon Isotope Evidence

Extreme air-sea interactions in the Gulf of Trieste (North Adriatic) during the strong Bora event in winter 2012

Contact Info

Product

Resources

About