scholarly journals Fibrocapsa japonica (Raphidophyceae) occurrence and ecological features within the phytoplankton assemblage of a cyclonic eddy, offshore the Eastern Alboran Sea.

2014 ◽  
Vol 15 (2) ◽  
pp. 250 ◽  
Author(s):  
F. FANI ◽  
C. NUCCIO ◽  
L. LAZZARA ◽  
L. MASSI ◽  
C. BATTOCCHI ◽  
...  
Keyword(s):  
Cyst Formation ◽  
Western Mediterranean ◽  
Cyclonic Eddy ◽  
Alboran Sea ◽  
Phytoplankton Assemblages ◽  
Ecological Features ◽  
Coastal Species ◽  
Fibrocapsa Japonica ◽  
First Time ◽  
Alborán Sea

The Raphidophycean Fibrocapsa japonica Toriumi & Takano was detected for the first time offshore in the Eastern Alboran Sea (Western Mediterranean) in October 2006. Its distribution appeared very localised and atypical, as it was abundant only in the open waters of a cyclonic eddy. Microscope counts of the natural phytoplankton assemblages revealed that F. japonica was dominant in the microplankton, together with Dinophyceae, within and below the cyclonic nutrient-rich dome (25 - 30 m). Bacillariophyceae were the primary microplanktonic fraction in only a few samples. Moderately high abundances of F. japonica (maximum of 60 cells ml-1), with preliminary cysts and many cells aggregated in mucous nets, indicated a senescent phase. We also suggest a Mediterranean origin for this species. This was confirmed by molecular identification and by a water temperature of 15 °C, which could have favoured pre-cyst formation. Finally, we hypothesise that F. japonica, which is generally a coastal species, could have a coastal origin. Since F. japonica was confined to the cyclonic waters, which typically derive from coastal waters, it was collected at a depth of 40-60 m at the coastal sites and it is generally a coastal species, we hypothesise that it could have a coastal origin and it was entrapped by the cyclonic eddy, which could have carried offshore this harmful species.

Redescription of the zooxanthellate Eudendrium moulouyensis (Eudendriidae: Hydrozoa) from the Mediterranean Sea

2008 ◽  
Vol 88 (8) ◽  
pp. 1655-1662 ◽  
Author(s):  
D. De Vito ◽  
F. Boero ◽  
C.G. Di Camillo ◽  
C. Megina ◽  
S. Piraino
Keyword(s):  
Life Cycle ◽  
Mediterranean Sea ◽  
Original Description ◽  
Western Mediterranean ◽  
Alboran Sea ◽  
Northern Adriatic ◽  
Full Life Cycle ◽  
The Mediterranean ◽  
First Time ◽  
Alborán Sea

Eudendrium moulouyensis is a zooxanthellate hydroid originally described from the Chafarinas Islands (Alboran Sea, south-western Mediterranean) in summer 1991. According to the original description, this species can be identified due to the occurrence of symbiotic zooxanthellae in the entire endodermal layer of the colony (gastrodermis and tentacle endodermis), a unique feature among the Mediterranean Eudendrium species. However, several aspects of its life cycle and the extent of its phenotypical variability are still unknown. Since winter 2004, colonies of E. moulouyensis were recorded throughout the year from 0.5 m to 30 m depth from the southern Adriatic Sea (Otranto Channel) and the Gibraltar Strait (Alboran Sea). Additional specimens were collected from the northern Adriatic (Vis, Croatia), Sicily Channel (Pantelleria and Lampedusa Islands), and western Sardinia (Costa Paradiso). These findings offered the opportunity to describe for the first time the full life cycle and to elucidate several biological aspects related to phenotypical variation of colony morphology, vertical zonation, seasonality, zooxanthellae–polyp relationship, and cnidome morphology and distribution. The number and morphology of male gonophores per reproductive polyp is described here for the first time, providing a useful taxonomic character to easily discriminate Myrionema amboinense from E. moulouyensis. From the available information, the occurrence of M. amboinense in the Mediterranean Sea should be regarded as doubtful, if they are not accompanied by observations of cnidome, male gonophores or distinctly separate tentacles whorls.

scholarly journals Types and Distribution of Bioactive Polyunsaturated Aldehydes in a Gradient from Mesotrophic to Oligotrophic Waters in the Alborán Sea (Western Mediterranean)

Marine Drugs ◽  
2020 ◽  
Vol 18 (3) ◽  
pp. 159 ◽  
Author(s):  
Ana Bartual ◽  
María Hernanz-Torrijos ◽  
Iria Sala ◽  
María J. Ortega ◽  
Cristina González-García ◽  
...  
Keyword(s):  
Physiological State ◽  
Western Mediterranean ◽  
Chemical Defenses ◽  
Bioactive Molecules ◽  
Alboran Sea ◽  
Daily Fluctuation ◽  
Large Size ◽  
Polyunsaturated Aldehydes ◽  
First Time ◽  
Alborán Sea

Polyunsaturated aldehydes (PUAs) are bioactive molecules suggested as chemical defenses and infochemicals. In marine coastal habitats, diatoms reach high PUA production levels during bloom episodes. Two fractions of PUA can usually be analyzed: pPUA obtained via artificial breakage of collected phytoplankton cells and dissolved PUA already released to the environment (dPUA). In nature, resource supply arises as a main environmental controlling factor of PUA production. In this work, we monitored the vertical distribution and daily variation of pPUA associated with large-size phytoplankton and dPUA, at three sites located in the Alborán Sea from mesotrophic to oligotrophic waters. The results corroborate the presence of large-size PUA producers in oligotrophic and mesotrophic waters with a significant (58%–85%) diatom biomass. In addition to diatoms, significant correlations between pPUA production and dinoflagellate and silicoflagellate abundance were observed. 2E,4E/Z-Heptadienal was the most abundant aldehyde at the three sites with higher values (17.1 fg·cell−1) at the most oligotrophic site. 2E,4E/Z-Decadienal was the least abundant aldehyde, decreasing toward the oligotrophic site. For the first time, we describe the daily fluctuation of pPUA attributable to cellular physiological state and not exclusively to taxonomical composition. Our results demonstrate the persistence of threshold levels of dPUA deep in the water column, as well as the different chromatographic profiles of dPUA compared with pPUA. We propose different isomerization processes that alter the chemical structure of the released PUAs with unknown effects on their stability, biological function, and potential bioactivity.

Checklist of benthic marine Cyanoprokariota of Chafarinas Islands (Alboran Sea, Western Mediterranean). Catálogo de cianoprocariotas bentónicas marinas de las Islas Chafarinas (Mar de Alborán, Mediterráneo Occidental)

2013 ◽  
Vol 38 ◽  
pp. 182-186 ◽  
Author(s):  
Julio De la Rosa Álamos ◽  
María Altamirano ◽  
Marianela Zanolla
Keyword(s):  
Marine Algae ◽  
Western Mediterranean ◽  
Alboran Sea ◽  
Palabras Clave ◽  
Alborán Sea

Catálogo de cianoprocariotas bentónicas marinas de las Islas Chafarinas (Mar de Alborán, Mediterráneo Occidental) Keywords: Chafarinas Islands, Cyanoprokariota, marine algae, Alboran Sea. Palabras clave: Islas Chafarinas, Cyanoprokariotas, algas marinas, Mar de Alborán.

First record of Sphoeroides spengleri (Osteichthyes: Tetraodontidae) in the Mediterranean Sea

2004 ◽  
Vol 84 (5) ◽  
pp. 1089-1090 ◽  
Author(s):  
J.A. Reina-Hervás ◽  
J.E. García Raso ◽  
M.E. Manjón-Cabeza
Keyword(s):  
Alien Species ◽  
Mediterranean Sea ◽  
First Record ◽  
Western Mediterranean ◽  
Alboran Sea ◽  
Total Length ◽  
The Mediterranean ◽  
Alborán Sea

The capture of a specimen of Sphoeroides spengleri (Osteichthyes: Tetraodontidae), 17 December 2000 and 29·7 mm total length, from the Málaga coast (Alborán Sea, western Mediterranean) represents the first record of a new alien species for Mediterranean waters.

scholarly journals Living benthic foraminifera from cold-water coral ecosystems in the eastern Alboran Sea, Western Mediterranean

Heliyon ◽  
2021 ◽  
pp. e07880
Author(s):  
Claudio Stalder ◽  
Akram El Kateb ◽  
Jorge E. Spangenberg ◽  
Loubna Terhzaz ◽  
Agostina Vertino ◽  
...  
Keyword(s):  
Benthic Foraminifera ◽  
Cold Water ◽  
Western Mediterranean ◽  
Alboran Sea ◽  
Alborán Sea ◽  
Water Coral

Particulate barium fluxes on the continental margin: a study from the Alboran Sea (Western Mediterranean)

2005 ◽  
Vol 93 (2-4) ◽  
pp. 105-117 ◽  
Author(s):  
Anna Sanchez-Vidal ◽  
Robert W. Collier ◽  
Antoni Calafat ◽  
Joan Fabres ◽  
Miquel Canals
Keyword(s):  
Continental Margin ◽  
Western Mediterranean ◽  
Alboran Sea ◽  
Alborán Sea

scholarly journals Imaging the Growth of Recent Faults: The Case of 2016-2017 Seismic Sequence Sea Bottom Deformation in the Alboran Sea (Western Mediterranean)

Tectonics ◽  
2018 ◽  
Vol 37 (8) ◽  
pp. 2513-2530 ◽  
Author(s):  
J. Galindo-Zaldivar ◽  
G. Ercilla ◽  
F. Estrada ◽  
M. Catalán ◽  
E. d'Acremont ◽  
...  
Keyword(s):  
Western Mediterranean ◽  
Seismic Sequence ◽  
Alboran Sea ◽  
Sea Bottom ◽  
Bottom Deformation ◽  
Alborán Sea

Effects of mechanized dredging targeting Chamelea gallina, striped venus clams, on the associated discards in the northern Alboran Sea (Western Mediterranean Sea)

2018 ◽  
Vol 99 (3) ◽  
pp. 575-585
Author(s):  
Javier Urra ◽  
Teresa García ◽  
Estefanía León ◽  
Helena Gallardo-Roldán ◽  
Matías Lozano ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Management Plan ◽  
Western Mediterranean ◽  
Alboran Sea ◽  
Severe Damage ◽  
Damage Level ◽  
Biological Communities ◽  
Western Mediterranean Sea ◽  
Chamelea Gallina ◽  
Alborán Sea

Mechanized dredging impact on discards was assessed along the northern Alboran Sea (W Mediterranean Sea). Data from 101 dredging operations were analysed for contrasting spatial and seasonal variability of damage, with the use of a three-level damage scale. 4.5% of discarded individuals displayed intermediate damage, whereas 11.3% displayed severe damage. Echinoderms displayed the highest level of damage (~75% of total collected individuals) and Echinocardium cf. mediterraneum was the most susceptible discarded species (85% with severe damage), followed by bivalves (7.3%) and crustaceans (3.3%). The target Chamelea gallina showed a low proportion of damaged individuals, probably due to their thick protective shell, which promotes the survival of discarded undersized target individuals. Spatial differences in damage level on discards were linked to some gear characteristics, to the higher amount of gravels and to longer tow durations, whereas damage was generally higher in cold months and partly related to higher quantities of hard shelled molluscs, in both cases increasing the abrasion and damage to retained organisms. Data suggest that dredges with a lower number of narrower iron teeth and towed for a shorter time could decrease the damage rate in discards of this fishery. A spatial management plan based on the type of grounds would be useful in order to improve efficiency of these fisheries and minimize their impact to soft bottoms with different commercial catches and biological communities.

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