|
|
|
|
|
| Pavoni, B; Caliceti, M; Sperni, L; Sfriso, A. |
| Samples of seven genera of seaweeds (Ulva, Gracilaria, Porphyra, Grateloupia, Undaria, Fucus and Cystoseira), which can be used as environmental biomonitors and in several applications like human alimentation, animal feeding and cosmetics, were collected in four sampling sites in the Lagoon of Venice in spring and autumn 1999 with the aim of determining the contamination due to organic micropollutants (polychlorinated biphenyls. PCBs; chlorinated pesticides; polycyclic aromatic hydrocarbons, PAHs). On an average, most of the considered species were contaminated especially by PAHs (up to 56 ng g(-1) dry wt. (dw)) whereas concentrations of PCBs and pesticides in macroalgal tissues were significantly correlated and did not exceed 5 ng g-1 dw. Among the... |
| Tipo: Text |
Palavras-chave: Macro-algues; Lagune de Venise; HAP; PCB; Pesticides; Seaweeds; Venice Lagoon; PAHs; PCBs; Pesticides. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43250/42981.pdf |
| |
|
|
| Sfriso, A; Facca, C; Ceoldo, S; Silvestri, S; Ghetti, Pf. |
| Nutrient concentrations have been investigated in the Venice lagoon for three scenarios: abnormal growth of nuisance macroalgae, decrease of macroalgal dominance and intense catching of the bivalve Tapes philippinarum Adams and Reeve by means of hydraulic and mechanical dredges. Total nitrogen and organic and total phosphorus monitored in June 1087, 1993 and 1998 showed significant changes both in concentrations and distribution. The disappearance of macroalgal blooms and the starting of intense clam fishing activities affected mainly organic phosphorus concentrations which, between 1987 and 1998, decreased from 104 +/- 42 to 59 +/- 31 mug cm(-3), accounting for 27% (1987) and 16% (1998) of total phosphorus, respectively. Peak values also decreased... |
| Tipo: Text |
Palavras-chave: Sels nutritifs; Sédiments superficiels; Biomasse microalgale; Lagune de Venise; Nutrient concentrations; Surface sediments; Macroalgal biomass; Clam fishing; Venice lagoon. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00322/43280/43015.pdf |
| |
|
|
|
