Chiara Facca | Università Ca' Foscari Venezia (original) (raw)
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Papers by Chiara Facca
Acta Adriatica, 2004
We investigated the phytoplankton in the central area of the Venice lagoon in the 1990s. Water sa... more We investigated the phytoplankton in the central area of the Venice lagoon in the 1990s. Water samples were collected at 46 sites in June 1993 and June 1998 and at four stations every month from November 1998 to October 1999. Collected data include community composition, cell abundance, and cell bio-volumes, estimated with an inverted light microscope. Cell abundance distribution maps display mean (6.9 x 10 6 and 2.5 x 10 6 cells dm - 3 in June 1993 and June 1998, respectively) and peak values (151 and 16 x 10 6 cells dm - 3 in June 1993 and June 1998, respectively). The reasons for differences in blooming taxa were investigated by processing environmental variables of the most abundant taxa by Canonical Correspondence Analysis. The environmental parameters that most affected the species spatial distribution were salinity and temperature in June 1993 and salinity and water transparency in June 1998. Phytoplankton temporal trends confirmed the spatial distribution: the blooming perio...
Acta Adriatica, 2003
ABSTRACT
The coastline of the north-western Adriatic Sea is characterized by the widest concentration of w... more The coastline of the north-western Adriatic Sea is characterized by the widest concentration of wetlands in the Mediterranean Ecoregion. Approximately 650 km 2 of such transitional waters fall into the Veneto region area, representing an important socio-economical resource and a relevant ecological heritage. In the attempt of fulfilling the requirements of the Water Framework Directive (EC 2000/60), the present study describes the trophic conditions and the water quality of the most important Veneto wetlands, comprising the Venice lagoon, the Po Delta system area and the Caorle lagoon. In relation to the water body typology all the considered stations were in restricted basins. Due to its extension and historical relevance, the bulk of information concerns the Venice lagoon for which ten-years monthly observations are available. For the other zones, samples were collected seasonally in 2008. The Macrophytes Quality Index (MaQI; Sfriso et al., 2009) is already implemented by the Ital...
Abundance, biomass, primary production and taxonomic composition of the microalgae in the Venice ... more Abundance, biomass, primary production and taxonomic composition of the microalgae in the Venice lagoon are presented in order to describe the interaction between the benthic and the planktonic communities. The surface sediments appeared to be richer in biomass and diversity but the primary production resulted similar when compared with the phytoplanktonic one.
In July 2007, 19 water and sediment samples were collected in the whole Grado-Marano lagoon in or... more In July 2007, 19 water and sediment samples were collected in the whole Grado-Marano lagoon in order to study the main nutrient concentrations and the diatom distribution. Lagoon waters resulted rich in nitrate in the areas of the river discharges, where a planktonic diatom bloom occurred, and poor in nutrient and microalgae in other areas. Benthic microalgae were dominated by epiphytes and large species. Key-words: nutrients, diatoms, water column, sediments, Grado-Marano lagoon. Introduzione – La laguna di grado-Marano si estende per 160 km2 nel bacino del Mar Adriatico settentrionale e riceve le acque di numerosi corsi d’acqua che attraversano un bacino scolante a carattere prevalentemente agricolo con alcune attività industriali che hanno causato una forte contaminazione da hg (Piani et al., 2005). Lo sfruttamento antropico delle risorse lagunari è legato soprattutto all’acquicoltura. Il presente lavoro si inserisce in un piano di studio degli ambienti di transizione con lo scop...
Acta Adriatica, 2004
We investigated the phytoplankton in the central area of the Venice lagoon in the 1990s. Water sa... more We investigated the phytoplankton in the central area of the Venice lagoon in the 1990s. Water samples were collected at 46 sites in June 1993 and June 1998 and at four stations every month from November 1998 to October 1999. Collected data include community composition, cell abundance, and cell bio-volumes, estimated with an inverted light microscope. Cell abundance distribution maps display mean (6.9 x 10 6 and 2.5 x 10 6 cells dm - 3 in June 1993 and June 1998, respectively) and peak values (151 and 16 x 10 6 cells dm - 3 in June 1993 and June 1998, respectively). The reasons for differences in blooming taxa were investigated by processing environmental variables of the most abundant taxa by Canonical Correspondence Analysis. The environmental parameters that most affected the species spatial distribution were salinity and temperature in June 1993 and salinity and water transparency in June 1998. Phytoplankton temporal trends confirmed the spatial distribution: the blooming perio...
Acta Adriatica, 2003
ABSTRACT
The coastline of the north-western Adriatic Sea is characterized by the widest concentration of w... more The coastline of the north-western Adriatic Sea is characterized by the widest concentration of wetlands in the Mediterranean Ecoregion. Approximately 650 km 2 of such transitional waters fall into the Veneto region area, representing an important socio-economical resource and a relevant ecological heritage. In the attempt of fulfilling the requirements of the Water Framework Directive (EC 2000/60), the present study describes the trophic conditions and the water quality of the most important Veneto wetlands, comprising the Venice lagoon, the Po Delta system area and the Caorle lagoon. In relation to the water body typology all the considered stations were in restricted basins. Due to its extension and historical relevance, the bulk of information concerns the Venice lagoon for which ten-years monthly observations are available. For the other zones, samples were collected seasonally in 2008. The Macrophytes Quality Index (MaQI; Sfriso et al., 2009) is already implemented by the Ital...
Abundance, biomass, primary production and taxonomic composition of the microalgae in the Venice ... more Abundance, biomass, primary production and taxonomic composition of the microalgae in the Venice lagoon are presented in order to describe the interaction between the benthic and the planktonic communities. The surface sediments appeared to be richer in biomass and diversity but the primary production resulted similar when compared with the phytoplanktonic one.
In July 2007, 19 water and sediment samples were collected in the whole Grado-Marano lagoon in or... more In July 2007, 19 water and sediment samples were collected in the whole Grado-Marano lagoon in order to study the main nutrient concentrations and the diatom distribution. Lagoon waters resulted rich in nitrate in the areas of the river discharges, where a planktonic diatom bloom occurred, and poor in nutrient and microalgae in other areas. Benthic microalgae were dominated by epiphytes and large species. Key-words: nutrients, diatoms, water column, sediments, Grado-Marano lagoon. Introduzione – La laguna di grado-Marano si estende per 160 km2 nel bacino del Mar Adriatico settentrionale e riceve le acque di numerosi corsi d’acqua che attraversano un bacino scolante a carattere prevalentemente agricolo con alcune attività industriali che hanno causato una forte contaminazione da hg (Piani et al., 2005). Lo sfruttamento antropico delle risorse lagunari è legato soprattutto all’acquicoltura. Il presente lavoro si inserisce in un piano di studio degli ambienti di transizione con lo scop...