Light and temperature requirements for survival, growth and reproduction of the crustose coralline Lithophyllum stictaeforme from the Mediterranean Sea

2016 ◽  
Vol 59 (2-3) ◽  
Author(s):  
Conxi Rodríguez-Prieto
Keyword(s):  
Mediterranean Sea ◽  
Laboratory Experiments ◽  
Temperature Requirements ◽  
The Mediterranean ◽  
Set Up ◽  
Growth And Reproduction

AbstractLaboratory experiments were set up in order to assess light and temperature requirements for survival, growth and reproduction of specimens of

scholarly journals Long-term monitoring programme of the hydrological variability in the Mediterranean Sea: a first overview of the HYDROCHANGES network

Ocean Science ◽  
2013 ◽  
Vol 9 (2) ◽  
pp. 301-324 ◽  
Author(s):  
K. Schroeder ◽  
C. Millot ◽  
L. Bengara ◽  
S. Ben Ismail ◽  
M. Bensi ◽  
...  
Keyword(s):  
Time Series ◽  
Mediterranean Sea ◽  
Sampling Interval ◽  
Global Changes ◽  
Hydrological Variability ◽  
Long Term Monitoring ◽  
The Mediterranean ◽  
Set Up ◽  
Term Monitoring

Abstract. The long-term monitoring of basic hydrological parameters (temperature and salinity), collected as time series with adequate temporal resolution (i.e. with a sampling interval allowing the resolution of all important timescales) in key places of the Mediterranean Sea (straits and channels, zones of dense water formation, deep parts of the basins), constitute a priority in the context of global changes. This led CIESM (The Mediterranean Science Commission) to support, since 2002, the HYDROCHANGES programme (http//www.ciesm.org/marine/programs/hydrochanges.htm), a network of autonomous conductivity, temperature, and depth (CTD) sensors, deployed on mainly short and easily manageable subsurface moorings, within the core of a certain water mass. The HYDROCHANGES strategy is twofold and develops on different scales. To get information about long-term changes of hydrological characteristics, long time series are needed. But before these series are long enough they allow the detection of links between them at shorter timescales that may provide extremely valuable information about the functioning of the Mediterranean Sea. The aim of this paper is to present the history of the programme and the current set-up of the network (monitored sites, involved groups) as well as to provide for the first time an overview of all the time series collected under the HYDROCHANGES umbrella, discussing the results obtained thanks to the programme.

Different light and temperature requirements for survival and growth in three species of Kallymeniaceae (Rhodophyta) from the Mediterranean Sea

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Conxi Rodríguez-Prieto
Keyword(s):  
Laboratory Experiments ◽  
Culture Conditions ◽  
Initial Surface ◽  
Target Species ◽  
Strong Decrease ◽  
Maximum Value ◽  
Determining Factors ◽  
Temperature Requirements ◽  
Survival And Growth ◽  
The Mediterranean

Abstract Laboratory experiments have shown that light and temperature requirements are critical determining factors for thallus survival and growth of three Mediterranean Kallymeniaceae (Rhodophyta): Verlaquea lacerata, Croisettea requienii, and Meredithia microphylla, and explain their current bathymetric and habitat distribution. Verlaquea lacerata is annual and survived more than 1.5 years in culture, while C. requienii and M. microphylla are perennial and survived more than four and nine years in culture, respectively. The maximum survival was observed at 20–50 µmol photon m−2 s−1 and 10 and 12 °C within an 8:16 h light:dark regime for the three species, while a strong decrease in survival was observed at temperatures of 24 and 26 °C, indicating a weak tolerance to warming temperatures in the Mediterranean. The maximum value of the rate of daily marginal extension per initial surface area was similar in the three species: 0.017 day−1 for V. lacerata (10 °C/8:16 h light:dark regime/10 µmol photon m−2 s−1), 0.021 day−1 for C. requienii (18 °C/14:10 h light:dark regime/10 µmol photon m−2 s−1), and 0.017 day−1 for M. microphylla (12 °C/8:16 h light:dark regime/20 µmol photon m−2 s−1). The experiments permitted the establishment of culture conditions for the target species, and the successful culture of marginal fragments indicates the possibility of indefinitely maintaining the species in the laboratory for bioconservation purposes.

Isolation and Insulation, 22000 BC–3000 BC

The Great Sea ◽  
2011 ◽  
Author(s):  
David Abulafia
Keyword(s):  
Mediterranean Sea ◽  
Homo Sapiens ◽  
Human Beings ◽  
Human Species ◽  
American School ◽  
Wild Pigs ◽  
Classical Studies ◽  
The Mediterranean ◽  
Set Up ◽  
Two Populations

Carved out millions of years before mankind reached its coasts, the Mediterranean Sea became a ‘sea between the lands’ linking opposite shores once human beings traversed its surface in search of habitation, food or other vital resources. Early types of humans inhabited the lands bordering the Mediterranean 435,000 years before the present, to judge from evidence for a hunters’ camp set up near modern Rome; others built a simple hut out of branches at Terra Amata near Nice, and created a hearth in the middle of their dwelling – their diet included rhinoceros and elephant meat as well as deer, rabbits and wild pigs. When early man first ventured out across the sea’s waters is uncertain. In 2010, the American School of Classical Studies at Athens announced the discovery in Crete of quartz hand-axes dated to before 130,000 BC, indicating that early types of humans found some means to cross the sea, though these people may have been swept there unintentionally on storm debris. Discoveries in caves on Gibraltar prove that 24,000 years ago another species of human looked across the sea towards the mountain of Jebel Musa, clearly visible on the facing shore of Africa: the first Neanderthal bones ever discovered, in 1848, were those of a woman who lived in a cave on the side of the Rock of Gibraltar. Since the original finds were not immediately identified as the remains of a different human species, it was only when, eight years later, similar bones were unearthed in the Neander Valley in Germany that this species gained a name: Neanderthal Man should carry the name Gibraltar Woman. The Gibraltar Neanderthals made use of the sea that lapped the shores of their territory, for their diet included shellfish and crustaceans, even turtles and seals, though at this time a flat plain separated their rock caves from the sea. But there is no evidence for a Neanderthal population in Morocco, which was colonized by homo sapiens sapiens, our own branch of humanity. The Straits apparently kept the two populations apart.

Slowing down the overturning – Insights from conceptual modelling on a stably stratified Mediterranean Sea during the Messinian Salinity Crisis

2020 ◽  
Author(s):  
Ronja Ebner ◽  
Paul Meijer
Keyword(s):  
Mediterranean Sea ◽  
Water Column ◽  
Messinian Salinity Crisis ◽  
Strait Of Gibraltar ◽  
Equable Climate ◽  
Box Models ◽  
Short Time Span ◽  
The Mediterranean ◽  
Set Up ◽  
Short Time

<p>Although the Mediterranean is known for its equable climate, this does not apply on geological timescales. At the end of the Miocene, salinity of the Mediterranean Sea exceeded gypsum and halite saturation, leading to the youngest known salt giant to form in a relatively short time span. This event is called the Messinian Salinity Crisis. Insight into the exact circumstances leading to this extreme situation would increase our understanding of today’s system and how it would react to climatic changes. Some of the theories rely on a drastic change in circulation, leading to a stably stratified water column at high salinities. It is yet to be determined how realistic these ideas are.</p><p>Conceptual box models can help to find answers to this. In a previous study it was already shown that a decrease in the rate of deep water formation in the margins can lead to a stratified water column. Here we used a predefined value for the overturning. In contrast, in the present study, the circulation, including the exchange through the strait of Gibraltar, is dynamically driven by density differences. By modelling stratification for various assumptions regarding the efficiency of the strait of Gibraltar, evaporation and the connectivity of the margins, this set-up ables us to get in-depth insights regarding the system in general, and the influence of climate and bathymetry on the circulation, specifically.</p><p>This model brings us one step closer to an understanding of the circumstances of this extreme state of the Mediterranean Sea</p>

scholarly journals Non-indigenous cephalopods in the Mediterranean Sea

2020 ◽  
Vol 61 (2) ◽  
pp. 113-134
Author(s):  
Giambattista Bello ◽  
Franco Andaloro ◽  
Pietro Battaglia
Keyword(s):  
Mediterranean Sea ◽  
Surface Current ◽  
Western Mediterranean ◽  
Eastern Basin ◽  
Sepia Pharaonis ◽  
Western Mediterranean Basin ◽  
Mode Of Life ◽  
The Mediterranean ◽  
Lessepsian Migrants ◽  
Set Up

The present review critically assesses the records of cephalopods that have entered the Mediterranean Sea in the last few decades. It includes 13 species, namely Sepia dollfusi, Stoloteuthis leucoptera, Sepioteuthis lessoniana, Architeuthis dux, Cranchia scabra, Taonius pavo, Megalocranchia sp., Teuthowenia megalops, Cycloteuthis sirventi, Taningia danae, Octopus cyanea, Amphioctopus sp. and Tremoctopus gracilis. The presence of Sepia pharaonis needs to be confirmed, whereas that of Sepia gibba and Spirula spirula is excluded. The arrivals from the Atlantic Ocean through the Strait of Gibraltar are related to the entrance surface current, which either carried passively planktonic paralarvae or favoured in some other way the entrance of subadult and adult stray specimens. As a matter of fact, all Atlantic cephalopods are pelagic oegopsid squids, with the exception of the nekto-benthic sepiolid S. leucoptera; all of them have been found only in the western Mediterranean basin. None of them seemingly established a stable population there, apart from the latter species. On the contrary, the cephalopods entering the Mediterranean from the Red Sea through the Suez Canal (Lessepsian migrants) lead a benthic mode of life. At least two of them, namely S. lessoniana and Amphioctopus sp., set up stable populations in the eastern basin. Lastly the occurrences of the pelagic octopod T. gracilis are ascribed, in the literature, to human-mediated transfer.

Elysia subornata (Mollusca) a potential control agent of the alga Caulerpa taxifolia (Chlorophyta) in the Mediterranean Sea

2001 ◽  
Vol 81 (3) ◽  
pp. 497-504 ◽  
Author(s):  
Thierry Thibaut ◽  
Alexandre Meinesz ◽  
Philippe Amade ◽  
Stéphane Charrier ◽  
Kate De Angelis ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Biological Control Agent ◽  
Control Agent ◽  
Limiting Factor ◽  
Caulerpa Taxifolia ◽  
Potential Control ◽  
Winter Temperatures ◽  
The Mediterranean ◽  
Invasive Alga ◽  
Growth And Reproduction

The biological characteristics of Elysia subornata (Mollusca: Opisthobranchia) were studied in an aquarium to assess its risks and chance of success as a potential biological control agent against the invasive alga Caulerpa taxifolia (Chlorophyta) in the Mediterranean Sea. This species feeds only on Caulerpa and has benthic larval development. Dietary switching is possible on some Mediterranean Caulerpales but feeding on other algae and sea grass is unlikely. The main limiting factor for the success of studied Caribbean strain of E. subornata are the Mediterranean winter temperatures which are lethal for that species. For the five months of the year which are favourable for feeding, growth and reproduction, the tested strain of E. subornata cannot reach a population density capable of controlling C. taxifolia.

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

Decadal oscillations in the Mediterranean Sea: a result of the overturning circulation variability in the eastern basin?

2006 ◽  
Vol 31 ◽  
pp. 257-271 ◽  
Author(s):  
G Pisacane ◽  
V Artale ◽  
S Calmanti ◽  
V Rupolo
Keyword(s):  
Mediterranean Sea ◽  
Overturning Circulation ◽  
Eastern Basin ◽  
The Mediterranean

Distribution and relative abundance of sperm whales in the Mediterranean Sea

2002 ◽  
Vol 243 ◽  
pp. 281-293 ◽  
Author(s):  
A Gannier ◽  
V Drouot ◽  
JC Goold
Keyword(s):  
Mediterranean Sea ◽  
Relative Abundance ◽  
Sperm Whales ◽  
The Mediterranean

Dolphin Morbillivirus in the Mediterranean Sea

2008 ◽  
Vol 34 (4) ◽  
pp. 514-515 ◽  
Author(s):  
Giovanni Di Guardo
Keyword(s):  
Mediterranean Sea ◽  
Dolphin Morbillivirus ◽  
The Mediterranean
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