MISIC , Cristina

Three oceanographic campaigns were carried out in the Gulf of Genoa, Ligurian Sea (NW Mediterranean), during summer 2002 and spring and late autumn 2003, to study organic matter production (reflected in chlorophyll-a concentrations) and recycling (assessed by means of ectoenzymatic activity evaluations and bacterial abundance and biomass...

Enzymatic activity was measured on two beaches of the Ligurian Sea (NW Mediterranean) during late spring and summer 2003. The detected activities (leucine aminopeptidase, b-glucosidase, a-glucosidase, and b-Nacetylglucosaminidase) were related to the available organic substrates (proteins and carbohydrates) and to the bacterial community...

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A survey of a Ligurian tourist harbour was carried out during winter 2006 and summer 2007 in order to study the organic matter (OM) turnover through extracellular enzymatic activity. Seawater and sediments were sampled at six stations, three inside the port boundaries, one outside the port and two in an area influenced by the outflow of a minor...

Seawater and sediment were collected on a monthly basis from a shallow (10.5 m depth) coastal site in the Ligurian Sea (NW Mediterranean) from November 1993 to December 1994 to determine the main environmental forces that influenced the biogeochemical processes and to study the relationships between the availability and lability of the organic...

The beaches of Liguria have been intensively affected by human activities for over a century, transforming nearly the entire coastline from natural to urbanised and significantly upsetting beach ecological properties. The present study aims to investigate 9 Ligurian beaches characterised by different degree of urbanisation, to test if and to...

Enzymatic activities (leucine aminopeptidase, LA; β-glucosidase, BG; alkaline phosphatase,AP), their related substrates and the bacterial abundance and biomass were studied over 1 yr in 2 adjacent areas of a sandy beach: one occupied by the structures of a private swimming establishment and undergoing major reconstruction work (impacted area),...

Organic matter consumption and decomposi- tion were studied in four experimental systems, having collected di erent organic substrates in the Ross Sea in December 1994. For the experimental approach selected, processes normally acting on a mixed pool of substances could be separated and the main features of each phe- nomenon could be focused...

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The results of a study on ectoenzymatic activity (the enzyme activity bound to particles larger than 0.2 µm) and its relation to organic particle concentration are reported here. The sampling was carried out during the 1994 Antarctic spring, at a fixed station (Station 11) in the polynya of the Ross Sea, an area characterised by quick changes...

We studied the dynamics of bacteria and organic matter in the Ancient Port of Genoa (Italy) during a bioremediation treatment of sediment (during summer–autumn 1998) in an area characterised by continuous sewage discharge. A strong increase in total benthic bacterial density (TBN) was recorded at the end of the study, from 14108 to 58–172108...

The beaches are sites where the human influence may be strong and the beach ecosystems have often shown a high sensibility to environmental alterations. These zones may be affected by a large series of anthropogenicderived pressures, such as unbalanced inorganic nutrient input, that may cause anomalous development of primary production,...

The development of benthic mucilage in the Marine Protected Area of Portofino (Ligurian Sea) during the summer of 2009 was studied to verify the influence of this event on the surrounding environment (seawater and soft-bottom). The calm meteorological and sea conditions at the beginning of the time frame under consideration caused the thermal...

Organic matter (OM) features, degradation and remineralisation were studied in the seawater of a natural coastal site (Marine Protected Area of Portofino) and at an urbanised coastal site (Quarto, Genoa city) of the Ligurian Sea. The accumulation of low trophic value OM and the persistence of phytoplanktonic biomass throughout the year were...

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Two samplings were carried out in a tourist harbour, during low and high touristic activity periods, to study the macro- and meiofaunal communities in relation to the environmental features. A multivariate analysis showed close relationships: the maritime traffic disturbance and the food quality and availability drive the spatial differences of...

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In Terra Nova Bay, a coastal area of the Ross Sea (Antarctica), the dissolved organic matter (DOM) (proteinlike and humiclike) in the seawater from two sampling stations was studied using the synchronous fluorescence technique and the evaluation of the dissolved proteins during the ice-free time lag (approximately four weeks). Moreover, a...

The variations in the expression of two hydrolytic ectoenzymes (leucine aminopeptidase – LA – and β glucosidase — BG) were studied in the southern Tyrrhenian Sea during spring 2004. This area is characterised by a complex morphology and hydrodynamism, which generate significant differences between different sectors, particularly in the 0–100 m...