scholarly journals Planktonic ciliates in the oligotrophic Mediterranean Sea: longitudinal trends of standing stocks, distributions and analysis of food vacuole contents

2001 ◽  
Vol 24 ◽  
pp. 297-311 ◽  
Author(s):  
P Pitta ◽  
A Giannakourou ◽  
U Christaki
Keyword(s):  
Mediterranean Sea ◽  
Food Vacuole ◽  
Planktonic Ciliates ◽  
Standing Stocks

Pattern of variation of zooplankton assemblages under the influence of river runoffs: a study case along the Apulian marine coastal waters (southern Italy, Mediterranean Sea)

2014 ◽  
Vol 65 (7) ◽  
pp. 652 ◽  
Author(s):  
Enrico Barbone ◽  
Annamaria Pastorelli ◽  
Vito Perrino ◽  
Massimo Blonda ◽  
Nicola Ungaro
Keyword(s):  
Water Quality ◽  
Mediterranean Sea ◽  
Coastal Waters ◽  
Strong Influence ◽  
Southern Italy ◽  
Biological Indicator ◽  
Time Period ◽  
Study Case ◽  
Standing Stocks ◽  
Pattern Of Variation

The distribution and composition of zooplankton assemblages was investigated along the Apulian marine–coastal area (Mediterranean Sea) in the time period between January 2008 and February 2010. Zooplankton samples were collected monthly from 15 monitoring stations located in two sub-basins, namely, the southern Adriatic (11 stations) and the northern Ionian (4 stations). Results indicated a strong influence of river runoffs on zooplankton assemblages in terms of an increase in the abundance of tolerant species and a reduction of overall richness and diversity of species. Compared with the Ionian, in the Adriatic stations, zooplankton standing stocks showed higher abundances. Results also suggest that the zooplankton can be considered a useful biological indicator of water quality for the Apulian coastal waters and could be used in environmental monitoring programs.

scholarly journals Low planktic foraminiferal diversity and abundance observed in a spring 2013 west–east Mediterranean Sea plankton tow transect

2017 ◽  
Vol 14 (9) ◽  
pp. 2245-2266 ◽  
Author(s):  
Miguel Mallo ◽  
Patrizia Ziveri ◽  
P. Graham Mortyn ◽  
Ralf Schiebel ◽  
Michael Grelaud
Keyword(s):  
Surface Water ◽  
Mediterranean Sea ◽  
Food Availability ◽  
Carbonate Chemistry ◽  
Foraminiferal Assemblage ◽  
Trophic Conditions ◽  
Western Basin ◽  
Eastern Basin ◽  
Seawater Carbonate Chemistry ◽  
Standing Stocks

Abstract. Planktic foraminifera were collected with 150 µm BONGO nets from the upper 200 m water depth at 20 stations across the Mediterranean Sea between 2 May and 2 June 2013. The main aim is to characterize the species distribution and test the covariance between foraminiferal area density (ρA) and seawater carbonate chemistry in a biogeochemical gradient including ultraoligotrophic conditions. Average foraminifera abundances are 1.42 ± 1.43 ind. 10 m−3 (ranging from 0.11 to 5.20 ind. 10 m−3), including 12 morphospecies. Large differences in species assemblages and total abundances are observed between the different Mediterranean sub-basins, with an overall dominance of spinose, symbiont-bearing species indicating oligotrophic conditions. The highest values in absolute abundance are found in the Strait of Gibraltar and the Alboran Sea. The western basin is dominated by Globorotalia inflata and Globigerina bulloides at slightly lower standing stocks than in the eastern basin. In contrast, the planktic foraminiferal assemblage in the warmer, saltier, and more nutrient-limited eastern basin is dominated by Globigerinoides ruber (white). These new results, when combined with previous findings, suggest that temperature-induced surface water stratification and food availability are the main factors controlling foraminiferal distribution. In the oligotrophic and highly alkaline and supersaturated with respect to calcite and aragonite Mediterranean surface water, standing stocks and ρA of G. ruber (white) and G. bulloides are affected by both food availability and seawater carbonate chemistry. Rapid warming increased surface ocean stratification impacting food availability and changes in trophic conditions could be the causes of reduced foraminiferal abundance, diversity, and species-specific changes in planktic foraminiferal calcification.

scholarly journals Low planktic foraminiferal diversity and abundance observed in a 2013 West-East Mediterranean Sea transect

2016 ◽  
Author(s):  
Miguel Mallo ◽  
Patrizia Ziveri ◽  
P. Graham Mortyn ◽  
Ralf Schiebel ◽  
Michaël Grelaud
Keyword(s):  
Mediterranean Sea ◽  
Food Availability ◽  
Sensu Stricto ◽  
Foraminiferal Assemblage ◽  
Trophic Conditions ◽  
Western Basin ◽  
Shell Weight ◽  
Planktic Foraminifera ◽  
Eastern Basin ◽  
Standing Stocks

Abstract. Planktic foraminifera were collected with 150 µm BONGO nets from the upper 200 m water depth at 20 stations across the Mediterranean Sea between 02 May and 02 June, 2013. The main aim was to characterize the species distribution and size-normalized shell weight (SNW). Average foraminifera abundances and diversity are 1.42 ± 1.43 ind.∙10 m−3 (ranging from 0.11 to 5.20 ind.∙10 m−3), with ten overall species found, respectively. Large differences in species assemblages and abundance values are observed between the different Mediterranean sub-basins, with an overall dominance of spinose, symbiont-bearing species indicating oligotrophic conditions. The highest values in absolute abundance are in the Strait of Gibraltar and Alboran Sea. The western basin is dominated by Globorotalia inflata and Globigerina bulloides at slightly lower standing stocks than in the eastern basin. In contrast, the planktic foraminiferal assemblage in the warmer, saltier and more nutrient-limited eastern basin is dominated by Globigerinoides ruber sensu stricto (s.s.). These new collective results in combination with comparison to previous findings, suggest that stratification of the surface water column, nutrient concentration and hence food availability, and temperature seem to be the main factors controlling foraminiferal abundances and distribution. Standing stocks and size-normalized weight (SNW) of G. ruber s.s. and G. bulloides are more related to food availability than seawater carbonate chemistry. Increasing temperature, salinity, surface ocean stratification and trophic conditions could be the causes of reduced abundance, diversity and species-specific changes in calcification in planktic foraminifera.

Evidence of a predation event on a tagged Mediterranean spearfish (Tetrapturus belone; Pisces, Istiophoridae), inferred from pop-up satellite tagging data

2020 ◽  
Vol 33 ◽  
pp. 23
Author(s):  
Danilo Malara ◽  
Pietro Battaglia ◽  
Pierpaolo Consoli ◽  
Erika Arcadi ◽  
Simonepietro Canese ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Research Group ◽  
Marine Mammals ◽  
Biodiversity Hotspot ◽  
Pelagic Species ◽  
Archival Tag ◽  
Abiotic Parameters ◽  
Predation Event ◽  
Satellite Tagging ◽  
First Time

The Strait of Messina is located at the centre of the Mediterranean Sea and is considered a biodiversity hotspot and an obligatory seasonal passage for different pelagic species such as sharks, marine mammals, and billfishes. For the first time, in the Strait of Messina, our research group tagged a Mediterranean spearfish (Tetrapturus belone) using a pop-up satellite archival tag (PSAT). The observation of abiotic parameters (depth, light, and temperature) recorded by the PSAT confirmed that the tagged specimen was predated after about nine hours. The tag was then regurgitated 14 days after the tag deployment date. The analysis of collected data seems to indicate that the predator may be an ectothermic shark, most likely the bluntnose sixgill shark (Hexanchus griseus).

Aeromonas dhakensis pneumonia and sepsis in a neonate Risso’s dolphin Grampus griseus from the Mediterranean Sea

2015 ◽  
Vol 116 (1) ◽  
pp. 69-74 ◽  
Author(s):  
L Pérez ◽  
ML Abarca ◽  
F Latif-Eugenín ◽  
R Beaz-Hidalgo ◽  
MJ Figueras ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Grampus Griseus ◽  
The Mediterranean ◽  
Risso's Dolphin
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