scholarly journals Nanoplankton protists from the western Mediterranean Sea. I. Occurrence, ultrastructure, taxonomy and ecological role of the mixotrophic flagellate Ollicola vangoorii (Chrysomonadidae = Chrysophyceae p.p.)

2002 ◽  
Vol 66 (3) ◽  
pp. 233-247 ◽  
Author(s):  
Gianfranco Novarino ◽  
Emilia Oliva ◽  
Blanca Pérez-Uz
Keyword(s):  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Ecological Role ◽  
Western Mediterranean Sea

scholarly journals Hydrodynamic modeling of coastal seas: the role of tidal dynamics in the Messina Strait, Western Mediterranean Sea

2016 ◽  
Author(s):  
A. Cucco ◽  
G. Quattrocchi ◽  
A. Olita ◽  
L. Fazioli ◽  
A. Ribotti ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
General Circulation ◽  
Circulation Pattern ◽  
Western Mediterranean ◽  
Water Circulation ◽  
Residual Circulation ◽  
Tidal Dynamics ◽  
Western Mediterranean Sea ◽  
Messina Strait

Abstract. This work explored the importance of considering tidal dynamics when modeling the general circulation in the Messina Strait, a narrow passage connecting the Tyrrhenian and the Ionian Sea sub-basins in the Western Mediterranean Sea. The tides and the induced water circulation in this Strait are among the most intense oceanographic processes in the Mediterranean Sea. The quantification of these effects can be particularly relevant for operational oceanographic systems aimed to provide short term predictions of the main hydrodynamics in the Western Mediterranean sub-basins. A numerical approach based on the use of a high resolution hydrodynamic model was adopted to firstly reproduce both the tides propagation and the wind induced and thermohaline water circulation within the Strait and surrounding areas and secondly to quantify the role of the Strait dynamics on the larger-scale water circulation. The obtained results confirmed the importance of a correct representation of the hydrodynamics in the Messina Strait even when focusing on predicting the water circulation in the external sea traits. In fact, model results show that tidal dynamics deeply impact the reproduction of the instantaneous and residual circulation pattern, waters thermohaline properties and transport dynamics both inside the Messina Strait and in the surrounding coastal and open waters.

scholarly journals Hydrodynamic modelling of coastal seas: the role of tidal dynamics in the Messina Strait, Western Mediterranean Sea

2016 ◽  
Vol 16 (7) ◽  
pp. 1553-1569 ◽  
Author(s):  
Andrea Cucco ◽  
Giovanni Quattrocchi ◽  
Antonio Olita ◽  
Leopoldo Fazioli ◽  
Alberto Ribotti ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
General Circulation ◽  
Circulation Pattern ◽  
Western Mediterranean ◽  
Water Circulation ◽  
Residual Circulation ◽  
Tidal Dynamics ◽  
Western Mediterranean Sea ◽  
Messina Strait

Abstract. This work explores the importance of considering tidal dynamics when modelling the general circulation in the Messina Strait, a narrow passage connecting the Tyrrhenian and the Ionian subbasins in the Western Mediterranean Sea. The tides and the induced water circulation in this Strait are among the most intense oceanographic processes in the Mediterranean Sea. The quantification of these effects can be particularly relevant for operational oceanographic systems aimed to provide short-term predictions of the main hydrodynamics in the Western Mediterranean subbasins. A numerical approach based on the use of a high-resolution hydrodynamic model was followed to reproduce the tides propagation and the wind-induced and thermohaline water circulation within the Strait and in surrounding areas. A set of numerical simulations was carried out to quantify the role of the Strait dynamics on the larger-scale water circulation. The obtained results confirmed the importance of a correct representation of the hydrodynamics in the Messina Strait even when focusing on predicting the water circulation in the external sea traits. In fact, model results show that tidal dynamics deeply impact the reproduction of the instantaneous and residual circulation pattern, waters thermohaline properties and transport dynamics both inside the Messina Strait and in the surrounding coastal and open waters.

scholarly journals Role of light and photophysiological properties on phytoplankton succession during the spring bloom in the north-western Mediterranean Sea

2013 ◽  
Vol 4 (1) ◽  
pp. 1 ◽  
Author(s):  
C. Brunet ◽  
F. Conversano ◽  
F. Margiotta ◽  
C. Dimier ◽  
L. Polimene ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Phytoplankton Community ◽  
Spring Bloom ◽  
Dynamic Condition ◽  
Western Mediterranean ◽  
Size Class ◽  
Physiological Adaptation ◽  
Western Mediterranean Sea ◽  
Role Of Light

This study aimed to determine the role of light on the succession of the phytoplankton community during the spring bloom in the northwestern Mediterranean Sea. To this end, three successive Lagrangian experiments were carried out between March and April 2003. The three experiments correspond to distinct phases of the bloom development (pre-bloom, bloom peak and post-bloom, respectively) and therefore to different trophic conditions. Phytoplankton (sampled on a daily scale) was grouped in size-based classes (pico and nano+micro) each of them were characterised in terms of chemotaxonomic composition, primary production and photophysiological properties. The phytoplankton community evolved with time changing in both size-class dominance and specie/group dominance within each size class. The bloom peak was characterised by highly dynamic condition (i.e. vertical mixing) and by the dominance of both small (pico) and large (nano and micro) diatoms, as a result of their capacity to photoacclimate to changing light regimes (‘physiological plasticity’). Concluding, we suggest that the physiological adaptation to light is the main factor driving the succession of the phytoplankton community during the first phases of the bloom (until the onset of thermal stratification) in the western Mediterranean Sea.

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