Arbulla, Deborah

Fanzutti, Giovanni Paolo

Pugliese, Nevio

Salvi, Gianguido

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47GiAnGuiDo sAlvi1, nevio puGliese1, DeBorAh ArBullA2, GiovAnni pAolo fAnzutti11Dipartimento di Matematica e Geoscienze, Università degli studi di Trieste; 2Museo Civico di Storia Naturale di TriesteThe research on recent freshwater ostracods of Friuli Venezia Giulia region	does	not	have	a	firm	tradition,	and	available	data	mostly	rely	on	occasional investigations (Colizza et al., 1987, 1990). Recently detailed accounts on taxonomy, ecology and geographic distribution of Italian os-tracods have been published in Friuli Venezia Giulia (Pieri et al. 2009; Stoch 2003, 2004).In the present study, we analyzed 45 bottom sediments collected in Lago di Bordaglia, a small glacial lake located in the northernmost sec-tor of the Carnic Alps at altitudes of 1750 m a.s.l., during two different summer survey (1991-1992). Bathymetry, physical and hydrochemical variables were measured (pH, Oxygen, Carbonates), sedimentological (textural) analysis was also carried out. Freshwater ostracods fauna  from Lago di Bordaglia (Friuli Venezia Giulia - NE Italy)48Three ostracod species (Cypria ophthalmica, Cypridopsis vidua and Candona candida)	 were	 identified.	 The	 most	 abundant	 species	are represented by Cypria ophthalmica followed by Cypridopsis vidua. The	 first	 results	 seems	 to	 indicate	 a	major	 relationship	 between	 the	highest values of carbonate and pH in sediments with high percentages of silt component and biocenosis, meanwhile Oxygen does not seem to indicate precise trends. Biocoenosis and thanatocoenosis indicate a preferential distribution (diffusion) in the southern part of the lake related to very shallow waters.However, it should be noted the broad tolerance of freshwater ostracods in terms of the environmental and ecological variables combined with a high resilience to extreme environments, such could be considered the high mountain lakes.ReferencesColizza, E., Fanzutti, G.P. & Pugliese, N., 1987. The diffusion of ostracode fauna in Lake Ragogna (Friuli, Italy). Biogeography, 13, 529-537.Colizza, E., Fanzutti, G.P., Melis, R., Polano, S., Pugliese, N., 1990. Primi risultati sui sedimenti e sulle ostracofaune del lago di Cavazzo o dei Tre Comuni (Udine). Atti tavola rotonda “Ecologia e Paleontologia”, Quader-no del Museo Geologico e Paleontologico di Monfalcone, 53-77.Pieri, V., Martens, K., Stoch, F., Rossetti G., 2009. Distribution and eco-logy of non-marine ostracods (Crustacea, Ostracoda) from Friuli Venezia Giulia (NE Italy). J. Limnol. 68, 1-15.Stoch, F., 2003. Indagini ecologiche e faunistiche sulla meiofauna (Acari e Crostacei) di alcune sorgenti del Parco Naturale delle Prealpi Giulie (Italia nord-orientale). Gortania, Atti Mus. Friul. St. Nat., Udine, 25, 239-250.Stoch, F., 2004. Prime osservazioni sulla fauna delle acque carsiche sotterranee delle Alpi Carniche. Mem. Ist. It. Spel., s. II, 15, 87-95.

Freshwater ostracods fauna from Lago di Bordaglia (Friuli Venezia Giulia - NE Italy)

SALVI, Gianguido

PUGLIESE, NEVIO

ARBULLA, DEBORAH

FANZUTTI, GIOVANNI PAOLO

Archivio istituzionale della ricerca - Università di Trieste

Freshwater ostracods
fauna from Lago di
Bordaglia (Friuli Venezia
Giulia - NE Italy)

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Freshwater ostracods fauna from Lago di Bordaglia (Friuli Venezia Giulia - NE Italy)

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