Patterns of Diversity of the Rissoidae (Mollusca: Gastropoda) in the Atlantic and the Mediterranean Region

The geographical distribution of the Rissoidae in the Atlantic Ocean and Mediterranean Sea was compiled and is up-to-date until July 2011. All species were classified according to their mode of larval development (planktotrophic and nonplanktotrophic), and bathymetrical zonation (shallow species—those living between the intertidal and 50 m depth, and deep species—those usually living below 50 m depth). 542 species of Rissoidae are presently reported to the Atlantic Ocean and the Mediterranean Sea, belonging to 33 genera. The Mediterranean Sea is the most diverse site, followed by Canary Islands, Caribbean, Portugal, and Cape Verde. The Mediterranean and Cape Verde Islands are the sites with higher numbers of endemic species, with predominance ofAlvaniaspp. in the first site, and ofAlvaniaandSchwartziellaat Cape Verde. In spite of the large number of rissoids at Madeira archipelago, a large number of species are shared with Canaries, Selvagens, and the Azores, thus only about 8% are endemic to the Madeira archipelago. Most of the 542-rissoid species that live in the Atlantic and in the Mediterranean are shallow species (323), 110 are considered as deep species, and 23 species are reported in both shallow and deep waters. There is a predominance of nonplanktotrophs in islands, seamounts, and at high and medium latitudes. This pattern is particularly evident in the generaCrisilla, Manzonia, Onoba, Porosalvania, Schwartziella, andSetia. Planktotrophic species are more abundant in the eastern Atlantic and in the Mediterranean Sea. The results of the analysis of the probable directions of faunal flows support the patterns found by both the Parsimony Analysis of Endemicity and the geographical distribution. Four main source areas for rissoids emerge: Mediterranean, Caribbean, Canaries/Madeira archipelagos, and the Cape Verde archipelago. We must stress the high percentage of endemics that occurs in the isolated islands of Saint Helena, Tristan da Cunha, Cape Verde archipelago and also the Azores, thus reinforcing the legislative protective actions that the local governments have implemented in these islands during the recent years.

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A new geographical record ofPolycera hedgpethiEr. Marcus, 1964 (Nudibranchia: Polyceridae) and evidence of its established presence in the Mediterranean Sea, with a review of its geographical distribution

Marine Biology Research ◽

10.1080/17451000.2012.706306 ◽

2012 ◽

Vol 8 (10) ◽

pp. 969-981 ◽

Cited By ~ 10

Author(s):

Erica Keppel ◽

Marco Sigovini ◽

Davide Tagliapietra

Keyword(s):

Mediterranean Sea ◽

Geographical Distribution ◽

Geographical Record ◽

The Mediterranean ◽

New Geographical Record

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A Near-Uniform Basin-Wide Sea Level Fluctuation of the Mediterranean Sea

Journal of Physical Oceanography ◽

10.1175/jpo3016.1 ◽

2007 ◽

Vol 37 (2) ◽

pp. 338-358 ◽

Cited By ~ 56

Author(s):

Ichiro Fukumori ◽

Dimitris Menemenlis ◽

Tong Lee

Keyword(s):

Atlantic Ocean ◽

Mediterranean Sea ◽

Sea Level ◽

Ocean Circulation ◽

Large Scale ◽

Circulation Model ◽

Level Fluctuation ◽

Strait Of Gibraltar ◽

Sea Level Fluctuation ◽

The Mediterranean

Abstract A new basin-wide oscillation of the Mediterranean Sea is identified and analyzed using sea level observations from the Ocean Topography Experiment (TOPEX)/Poseidon satellite altimeter and a numerical ocean circulation model. More than 50% of the large-scale, nontidal, and non-pressure-driven variance of sea level can be attributed to this oscillation, which is nearly uniform in phase and amplitude across the entire basin. The oscillation has periods ranging from 10 days to several years and has a magnitude as large as 10 cm. The model suggests that the fluctuations are driven by winds at the Strait of Gibraltar and its neighboring region, including the Alboran Sea and a part of the Atlantic Ocean immediately to the west of the strait. Winds in this region force a net mass flux through the Strait of Gibraltar to which the Mediterranean Sea adjusts almost uniformly across its entire basin with depth-independent pressure perturbations. The wind-driven response can be explained in part by wind setup; a near-stationary balance is established between the along-strait wind in this forcing region and the sea level difference between the Mediterranean Sea and the Atlantic Ocean. The amplitude of this basin-wide wind-driven sea level fluctuation is inversely proportional to the setup region’s depth but is insensitive to its width including that of Gibraltar Strait. The wind-driven fluctuation is coherent with atmospheric pressure over the basin and contributes to the apparent deviation of the Mediterranean Sea from an inverse barometer response.

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Management Strategies for Seabream Sparus aurata Cultivation in Floating Cages in the Mediterranean Sea and Atlantic Ocean

Journal of the World Aquaculture Society ◽

10.1111/j.1749-7345.2003.tb00036.x ◽

2003 ◽

Vol 34 (1) ◽

pp. 29-39 ◽

Cited By ~ 6

Author(s):

Eucario Gasca-Leyva ◽

Carmelo J. León ◽

Juan M. Hernández

Keyword(s):

Atlantic Ocean ◽

Mediterranean Sea ◽

Sparus Aurata ◽

Management Strategies ◽

The Mediterranean

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High genetic differentiation of red gorgonian populations from the Atlantic Ocean and the Mediterranean Sea

Marine Biology Research ◽

10.1080/17451000.2017.1312005 ◽

2017 ◽

Vol 13 (8) ◽

pp. 854-861 ◽

Cited By ~ 1

Author(s):

Joanna Pilczynska ◽

Silvia Cocito ◽

Joana Boavida ◽

Ester A. Serrão ◽

Henrique Queiroga

Keyword(s):

Genetic Differentiation ◽

Atlantic Ocean ◽

Mediterranean Sea ◽

The Mediterranean

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Echinoderes pterus sp. n. showing a geographically and bathymetrically wide distribution pattern on seamounts and on the deep-sea floor in the Arctic Ocean, Atlantic Ocean, and the Mediterranean Sea (Kinorhyncha, Cyclorhagida)

ZooKeys ◽

10.3897/zookeys.771.25534 ◽

2018 ◽

Vol 771 ◽

pp. 15-40 ◽

Cited By ~ 10

Author(s):

Hiroshi Yamasaki ◽

Katarzyna Grzelak ◽

Martin V. Sørensen ◽

Birger Neuhaus ◽

Kai Horst George

Keyword(s):

Atlantic Ocean ◽

Arctic Ocean ◽

Distribution Pattern ◽

Mediterranean Sea ◽

Deep Sea ◽

Wide Distribution ◽

The Arctic ◽

Sea Floor ◽

The Arctic Ocean ◽

The Mediterranean

Kinorhynchs rarely show a wide distribution pattern, due to their putatively low dispersal capabilities and/or limited sampling efforts. In this study, a new kinorhynch species is described,Echinoderespterussp. n., which shows a geographically and bathymetrically wide distribution, occurring on the Karasik Seamount and off the Svalbard Islands (Arctic Ocean), on the Sedlo Seamount (northeast Atlantic Ocean), and on the deep-sea floor off Crete and on the Anaximenes Seamount (Mediterranean Sea), at a depth range of 675–4,403 m. The new species is characterized by a combination of middorsal acicular spines on segments 4–8, laterodorsal tubes on segment 10, lateroventral tubes on segment 5, lateroventral acicular spines on segments 6–9, tufts of long hairs rising from slits in a laterodorsal position on segment 9, truncated tergal extensions on segment 11, and the absence of any type-2 gland cell outlet. The specimens belonging to the populations from the Arctic Ocean, the Sedlo Seamount, and the Mediterranean Sea show morphological variation in the thickness and length of the spines as well as in the presence/absence of ventromedial sensory spots on segment 7. The different populations are regarded as belonging to a single species because of their overlapping variable characters.

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Conséquences tectoniques de l'existence d'une anomalie de conductivité électrique au nord du Maroc

Canadian Journal of Earth Sciences ◽

10.1139/e82-130 ◽

1982 ◽

Vol 19 (7) ◽

pp. 1507-1517 ◽

Cited By ~ 10

Author(s):

Michel Menvielle ◽

Jean-Claude Rossignol

Keyword(s):

Atlantic Ocean ◽

Mediterranean Sea ◽

Geomagnetic Field ◽

Southern Spain ◽

Electric Currents ◽

Anomalous Field ◽

Conductivité Électrique ◽

The Mediterranean ◽

Transient Variations

Anomalous transient variations of the geomagnetic field in northern Morocco and southern Spain have been described previously for periods ranging from 10 min to 2 h. These results have been reinvestigated with regard to their tectonic implications.The main result obtained is evidence for a conductive structure that electrically connects the Atlantic Ocean to the Mediterranean Sea. This conductive structure coincides with a zone of fractures, extending over several hundreds of kilometres and deeply penetrating the crust, that may form the southeastern boundary of the Alboran block.We also show that the deviation and channeling of electric currents by lateral contrasts of conductivity may account for most of the features of the observed anomalous field in southern Spain and northern Morocco.

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Microbial rhodopsins are major contributors to the solar energy captured in the sea

Science Advances ◽

10.1126/sciadv.aaw8855 ◽

2019 ◽

Vol 5 (8) ◽

pp. eaaw8855 ◽

Cited By ~ 18

Author(s):

Laura Gómez-Consarnau ◽

John A. Raven ◽

Naomi M. Levine ◽

Lynda S. Cutter ◽

Deli Wang ◽

...

Keyword(s):

Solar Energy ◽

Atlantic Ocean ◽

Mediterranean Sea ◽

Geographical Distribution ◽

Proton Pumping ◽

Basal Metabolism ◽

Energy Capture ◽

Surface Ocean ◽

Vertical Distributions ◽

Energy Converting

All known phototrophic metabolisms on Earth rely on one of three categories of energy-converting pigments: chlorophyll-a (rarely -d), bacteriochlorophyll-a (rarely -b), and retinal, which is the chromophore in rhodopsins. While the significance of chlorophylls in solar energy capture has been studied for decades, the contribution of retinal-based phototrophy to this process remains largely unexplored. We report the first vertical distributions of the three energy-converting pigments measured along a contrasting nutrient gradient through the Mediterranean Sea and the Atlantic Ocean. The highest rhodopsin concentrations were observed above the deep chlorophyll-a maxima, and their geographical distribution tended to be inversely related to that of chlorophyll-a. We further show that proton-pumping proteorhodopsins potentially absorb as much light energy as chlorophyll-a–based phototrophy and that this energy is sufficient to sustain bacterial basal metabolism. This suggests that proteorhodopsins are a major energy-transducing mechanism to harvest solar energy in the surface ocean.

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Anthropogenic and natural CO<sub>2</sub> exchange through the Strait of Gibraltar

Biogeosciences ◽

10.5194/bg-6-647-2009 ◽

2009 ◽

Vol 6 (4) ◽

pp. 647-662 ◽

Cited By ~ 48

Author(s):

I. E. Huertas ◽

A. F. Ríos ◽

J. García-Lafuente ◽

A. Makaoui ◽

S. Rodríguez-Gálvez ◽

...

Keyword(s):

Time Series ◽

Atlantic Ocean ◽

Mediterranean Sea ◽

Mediterranean Basin ◽

Inorganic Carbon ◽

Strait Of Gibraltar ◽

Anthropogenic Carbon ◽

The Mediterranean ◽

The Mediterranean Basin ◽

Mediterranean Water

Abstract. The exchange of both anthropogenic and natural inorganic carbon between the Atlantic Ocean and the Mediterranean Sea through Strait of Gibraltar was studied for a period of two years under the frame of the CARBOOCEAN project. A comprehensive sampling program was conducted, which was design to collect samples at eight fixed stations located in the Strait in successive cruises periodically distributed through the year in order to ensure a good spatial and temporal coverage. As a result of this monitoring, a time series namely GIFT (GIbraltar Fixed Time series) has been established, allowing the generation of an extensive data set of the carbon system parameters in the area. Data acquired during the development of nine campaigns were analyzed in this work. Total inorganic carbon concentration (CT) was calculated from alkalinity-pHT pairs and appropriate thermodynamic relationships, with the concentration of anthropogenic carbon (CANT) being also computed using two methods, the ΔC* and the TrOCA approach. Applying a two-layer model of water mass exchange through the Strait and using a value of −0.85 Sv for the average transport of the outflowing Mediterranean water recorded in situ during the considered period, a net export of inorganic carbon from the Mediterranean Sea to the Atlantic was obtained, which amounted to 25±0.6 Tg C yr−1. A net alkalinity output of 16±0.6 Tg C yr−1 was also observed to occur through the Strait. In contrast, the Atlantic water was found to contain a higher concentration of anthropogenic carbon than the Mediterranean water, resulting in a net flux of CANT towards the Mediterranean basin of 4.20±0.04 Tg C yr−1 by using the ΔC* method, which constituted the most adequate approach for this environment. A carbon balance in the Mediterranean was assessed and fluxes through the Strait are discussed in relation to the highly diverse estimates available in the literature for the area and the different approaches considered for CANT estimation. This work unequivocally confirms the relevant role of the Strait of Gibraltar as a controlling point for the biogeochemical exchanges occurring between the Mediterranean Sea and the Atlantic Ocean and emphasizes the influence of the Mediterranean basin in the carbon inventories of the North Atlantic.

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