Dispersal Processes of Freshwaters in the Po River Coastal Area1

Grancini, Gianfranco; Cescon, Bruno

doi:10.4319/lo.1973.18.5.0705

Cited by 21 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The northern Adriatic is the shallowest and most dynamic region of the Adriatic Sea. The coastal water mass circulation in this region is strongly influenced by freshwater outflow from the Po river which spreads in the surface layer, forming a plume that is separated from more saline Adriatic waters and giving rise to a frontal system (Grancini & Cescon 1973). This system is established in the northern basin for most of the year (Franco 1983, Fonda Umani et al 1992; the system clearly separates neritic, eutrophic waters from oligo-mesotrophic offshore waters, producing 2 independent and ecologically different environments (Franco 1984, Smodlaka 1986, Fonda Umani et al 1994, Alberighi et al 1997.…”

Section: Methodsmentioning

confidence: 99%

Inhibition of population growth in the copepods Acartia clausi and Calanus helgolandicus during diatom blooms

Miralto¹,

Guglielmo²,

Zagami³

et al. 2003

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

) were lower than for A. clausi. We conclude that the main factor responsible for reduced population recruitment rates of both species in winter was low hatching viability and that the bulk of annual recruitment in the North Adriatic Sea occurred in post-bloom conditions, since the mixed protistan community that succeeded the bloom was probably a better food source for copepod embryogenesis. The results are discussed in relation to laboratory findings on the toxic effects of diatoms on copepod reproduction.

show abstract

Section: Methodsmentioning

confidence: 99%

Inhibition of population growth in the copepods Acartia clausi and Calanus helgolandicus during diatom blooms

Miralto¹,

Guglielmo²,

Zagami³

et al. 2003

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…An estuarine plume is commonly observed to incline itself to either side of the coast, the Coriolis force as a driving factor, more typically against the coast to the right, facing downstream in the northern hemisphere [21]. Dynamics of the estuarine river plumes have been extensively studied through field observation [1,5,9,12,22,26,34,35,40,60,63,66,76,82], theoretical study [13,14,31,32,39,57,58,88], and numerical modeling [3, 4, 10, 11, 16-20, 28, 36, 37, 41, 43, 49, 54, 62, 64, 65, 70, 84, 89-93, 98, 99]. There has been considerable work done to understand how plume scales (along and across shore) depend on river discharge, as well as the importance of tides in modifying the plume dynamics.…”

Section: Introductionmentioning

confidence: 99%

The Hydrodynamics of an Idealized Estuarine Plume along a Straight Coast: A Numerical Study

Shi

Liu

2010

Environ Model Assess

View full text Add to dashboard Cite

The hydrodynamics of an idealized estuarine plume along a straight coast are studied using a threedimensional hydrodynamical module of the Coupled Hydrodynamical Ecological Model for Regional Shelf Seas. The sensitivity of the solution with respect to river discharge, bottom roughness length, and the presence or absence of tides are studied. Assuming constant water depth and no wind forcing, modeled results for the surface layer are obtained, including: (1) variation in the horizontal shape of the plume; (2) horizontal distribution of the current vector; and (3) horizontal distribution of the salinity field within the plume over one tidal cycle. Effects of three different river discharges, four selected different bottom roughness lengths, and tides on its development are examined. Results suggest: (1) the plume length naturally increases through time under tidal forcing or as well as without tidal forcing, but its width shows approximately periodic variation; (2) both the plume width and length increase with increasing river discharge; (3) both the plume width and length decrease with increasing four selected bottom roughness lengths; and (4) both the bulge and coastal current of the plume are more evident without the presence of tidal effects. The results show their potential implications for contaminant fate and transport and novel methods of pollution prevention and control in estuarine and coastal waters.

show abstract

“…DisCUssion the northern adriatic is the shallowest and most dynamic area of the adriatic sea. the coastal circulation is strongly influenced by the considerable, but pulsing freshwater outflow from the Po river which spreads at the surface, generating a plume during the stratified periods (spring to summer) (grancini and Cescon, 1973). in autumn-winter the mixed coastal waters are confined in a narrow belt, and the frontal system clearly separates neritic, eutrophic waters from offshore oligo-mesotrophic waters, producing two ecologically different environments (Franco, 1984;Fonda Umani et al, 1994).…”

Section: Prey Selectivitymentioning

confidence: 99%

Ecología alimentaria del góbido transparente <i>Aphia minuta</i> (Pisces, Gobiidae) en el noroeste del mar Adriático

et al. 2008

View full text Add to dashboard Cite

sUMMarY: the feeding ecology of the transparent goby Aphia minuta was examined in spring (May 2003) in the coastal waters off Comacchio, in the northwestern adriatic sea. stomach content analysis indicated A. minuta to be a planktivorous species, feeding exclusively on pelagic invertebrates. the diet composition was dominated by the calanoid copepods Acartia clausi and Temora longicornis, followed in decreasing order of importance by other copepods (especially calanoids and Oncaea spp.) and larvae of decapods, polychaetes and bivalves. A. minuta exhibited a generalistic feeding strategy with a relatively broad niche width. abundant taxa in the environment, such as A. clausi and T. longicornis, were seldom selected, whereas rare taxa, such as larvae of polychaetes and decapods, were highly selected. according to the observed ontogenetic shift in diet, small-size individuals relied preferentially on juvenile T. longicornis and Oncaea spp., whereas large-sized specimens consumed preferably A. clausi and calanoids. the positive relationship found between prey and fish size may help to mitigate the intraspecific competition for food resources.Keywords: diet, feeding selectivity, transparent goby, copepods, adriatic sea. resUMen: Ecología alimentaria del góbido transparente AphiA minutA (Pisces, Gobiidae) en el noroeste del mar Adriático. -en el presente trabajo se estudió la dieta del góbido transparente A. minuta durante la primavera (Mayo 2003) en el nor-oeste del Mar adriático (Comacchio). el análisis del contenido estomacal mostró que A. minuta es una especie planctívora, que se alimenta exclusivamente de invertebrados pelágicos. Los copépodos calanoides Acartia clausi y Temora longicornis constituyeron las presas dominantes seguidas, en orden de importancia decreciente, de otros copépodos (calanoides y Oncaea spp.), larvas de decápodos, poliquetos y bivalvos. A. minuta evidenció una estrategia alimentaria generalista y un nicho trófico amplio. Los taxones abundantes en el medio natural, A. clausi y T. longicornis, fueron raramente seleccionados, en cambio taxones poco frecuentes, como larvas de poliquetos y decápodos, estuvieron seleccionados positivamente. atendiendo al cambio en la dieta a lo largo de la ontogenia, los ejemplares de talla pequeña se alimentaron preferentemente de juveniles de T. longicornis y Oncaea spp., mientras los ejemplares de talla mas grande consumían preferentemente A. clausi y calanoides. La relación positiva observada entre el tamaño de la presa y del depredador podría contribuir a atenuar la competencia intraespecífica por los recursos alimenticio.

show abstract

Dispersal Processes of Freshwaters in the Po River Coastal Area1

Cited by 21 publications

References 2 publications

Inhibition of population growth in the copepods Acartia clausi and Calanus helgolandicus during diatom blooms

Inhibition of population growth in the copepods Acartia clausi and Calanus helgolandicus during diatom blooms

The Hydrodynamics of an Idealized Estuarine Plume along a Straight Coast: A Numerical Study

Ecología alimentaria del góbido transparente <i>Aphia minuta</i> (Pisces, Gobiidae) en el noroeste del mar Adriático

Contact Info

Product

Resources

About