The growth and contamination mechanism of the Cana Brava layered mafic-ultramafic complex: new field and geochemical evidences     

Giovanardi  Tommaso  Girardi  Vicente A. V.  Correia  Ciro T.  Sinigoi  Silvano  Tassinari  Colombo C. G.  Mazzucchelli  Maurizio 《Mineralogy and Petrology》2017,111(2):291-314

Mineralogy and Petrology - The Cana Brava complex is the northernmost of three layered complexes outcropping in the Goiás state (central Brasil). New field and geochemical evidences suggest...  相似文献   

Polycyclic aromatic hydrocarbons (PAHs) in transplanted Manila clams (Tapes philippinarum) from the Lagoon of Venice as assessed by PAHs/shell weight index: a preliminary study     

Boscolo R  Cacciatore F  Giovanardi O 《Marine pollution bulletin》2007,55(10-12):485-493

Variation of polycyclic aromatic hydrocarbons (PAHs) levels was assessed in Tapes philippinarum from the Lagoon of Venice. Clams were transplanted from a polluted area next to Porto Marghera to two rearing areas of the Southern Lagoon. Analyses of PAHs were made in sediments and clams by GC/MS at first sampling and after 30, 60 and 180 days. Principal component analysis was performed to elucidate bioaccumulation and depuration pattern and input sources. Biota-Sediment-Accumulation-Factor (BSAF) was applied to evaluate the PAHs input sources from sediment. Condition index was calculated to compare the seasonal variation of clam tissue to PAHs levels. To propose results not affected by seasonal changes in flesh weight of clams, the approach based on the calculation of PAHs/SW index was applied. From the results, it was concluded that PAHs/SW index is more recommendable to asses temporal variation of PAHs levels in Manila clams.  相似文献   

Organotins (TBT and DBT) in water, sediments, and gastropods of the southern Venice lagoon (Italy)   总被引：3，自引：0，他引：3  

Berto D  Giani M  Boscolo R  Covelli S  Giovanardi O  Massironi M  Grassia L 《Marine pollution bulletin》2007,55(10-12):425-435

The release of tributyltin (TBT) from maritime traffic represents one of the main problems of direct, diffuse, and continued contamination of the marine environment. In the present survey, the concentrations of TBT and dibultytin (DBT) in brackish waters, sediments, and the gastropods Nassarius nitidus were evaluated in order to estimate the contamination of the southern part of the Venice lagoon. TBT and DBT were determined by GC-MS/MS. Recent contamination of TBT was found in brackish waters near marinas, whereas the highest concentrations of TBT and DBT were observed in surface sediments at dockyards and harbours. High content of organotin in the gastropods sampled near the dockyards, harbours, and marinas showed a mobilisation from the sediments through the food web. The present study allowed assessment of whether, despite the ban on the use of TBT paints, waters, sediments, and biota were still being contaminated by organotin compounds in the southern Venice lagoon.  相似文献   

Comparison Between the Energy Flow Networks of Two Habitats in the Venice Lagoon     

Simone Libralato  Roberto Pastres  Fabio Pranovi  Sa&#;a Raicevich  Angela Granzotto  Otello Giovanardi  Patrizia Torricelli 《Marine Ecology》2002,23(S1):228-236

Abstract. The energy flows of two habitats are quantified and compared by using a trophic network model. The habitats are representative of two typical subsystems of the Venice Lagoon: the seagrass meadows, which represent a mature stage in the ecological succession of lagoon environments, and the Tapes philippinarum fishing grounds, which are subjected to mechanical clam harvesting.
The results obtained for the 'seagrass habitat'are consistent with other field studies, confirming the'key-stone'role played by phanerogams in a lagoon environment. The results for the 'Tapes habitat'show that the energy flow from the sediment to the water column is extremely important. Indeed, the high T. philippinarum biomass cannot be supported solely by the primary production of the local phytoplankton. Instead, this biomass could be supported by a supply provided by the sediment resuspension caused by intensive clam fishing. These findings suggest the presence of a positive feedback between fishing effort and T. philippinarum standing crop.  相似文献   

Rapido trawling in the northern Adriatic Sea: effects on benthic communities in an experimental area   总被引：5，自引：2，他引：3  

Pranovi  F.; Raicevich  S.; Franceschini  G.; Farrace  M. G.; Giovanardi  O. 《ICES Journal of Marine Science》2000,57(3):517-524

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The Hf-INATOR: A free data reduction spreadsheet for Lu/Hf isotope analysis     

T. Giovanardi  F. Lugli 《Earth Science Informatics》2017,10(4):517-523

During the last decade, the in situ Lu-Hf isotope methodology has been widely used in Earth sciences and the number of laboratories performing Lu-Hf analysis has increased together with dedicated scientific software. However, free and user-friendly software for the Lu-Hf data reduction is currently missing. We present the ‘Hf-INATOR’, a new interactive Excel spreadsheet, simple to use and completely free (compatible with Libreoffice and Openoffice) that performs data reduction of the Lu-Hf analytical outputs and calculates the main parameters of the Lu-Hf systematic, such as the 2σ errors, the εHf₍₀₎, the εHf_(t), the T_DM, the T_DM ^C and the f_Lu/Hf.  相似文献