scholarly journals Deep-water macroalgal-dominated coastal detritic assemblages on the continental shelf off Mallorca and Menorca (Balearic Islands, Western Mediterranean)

2012 ◽  
Vol 55 (5) ◽  
Author(s):  
Sergi Joher ◽  
Enric Ballesteros ◽  
Emma Cebrian ◽  
Noemí Sánchez ◽  
Conxi Rodríguez-Prieto
Keyword(s):  
Continental Shelf ◽  
Deep Water ◽  
Western Mediterranean ◽  
Balearic Islands

Assessment of the deep water trawl fishery off the Balearic Islands (western Mediterranean): from single to multi-species approach

Hydrobiologia ◽  
2011 ◽  
Vol 670 (1) ◽  
pp. 67-85 ◽  
Author(s):  
Beatriz Guijarro ◽  
George Tserpes ◽  
Joan Moranta ◽  
Enric Massutí
Keyword(s):  
Deep Water ◽  
Western Mediterranean ◽  
Balearic Islands ◽  
Trawl Fishery

scholarly journals Contribution to the study of deep coastal detritic bottoms: the algal communities of the continental shelf off the Balearic Islands, Western Mediterranean

2015 ◽  
Vol 16 (3) ◽  
pp. 573 ◽  
Author(s):  
S. JOHER ◽  
E. BALLESTEROS ◽  
C. RODRIGUES-PRIETO
Keyword(s):  
Continental Shelf ◽  
Western Mediterranean ◽  
Balearic Islands ◽  
Anthropogenic Pressure ◽  
Beam Trawl ◽  
Southern Coast ◽  
Algal Communities ◽  
Composition And Structure ◽  
Maerl Beds ◽  
Box Corer

Three main algal-dominated coastal detritic communities from the continental shelf off Mallorca and Menorca (Balearic Islands, Western Mediterranean) are described herein: maërl beds dominated by Spongites fruticulosus and forests of Laminaria rodriguezii located in the Menorca channel, and Peyssonnelia inamoena beds found along the Southern coast of Menorca. There seems to be a gradient of disturbance from the highly disturbed Peyssonnelia beds to the almost undisturbed L. rodriguezii forests. Whether this gradient is the result of current and past anthropogenic pressure (e.g. trawling intensity) or is driven by natural environmental factors needs further assessment. Finally, the location of the target communities by means of ROV dives combined with the use of a Box-Corer dredge and beam trawl proved to be a good methodology in the study of the composition and structure of these deep water detritic communities.

scholarly journals A captorhinid-dominated assemblage from the palaeoequatorial Permian of Menorca (Balearic Islands, western Mediterranean)

2021 ◽  
pp. 1-21
Author(s):  
Rafel MATAMALES-ANDREU ◽  
Francesc X. ROIG-MUNAR ◽  
Oriol OMS ◽  
Àngel GALOBART ◽  
Josep FORTUNY
Keyword(s):  
Western Mediterranean ◽  
Balearic Islands ◽  
Distribution Area ◽  
Lower Permian ◽  
Incertae Sedis ◽  
The North ◽  
Low Latitudes ◽  
High Fibre ◽  
Successful Group ◽  
Neighbouring Island

ABSTRACT Moradisaurine captorhinid eureptiles were a successful group of high-fibre herbivores that lived in the arid low latitudes of Pangaea during the Permian. Here we describe a palaeoassemblage from the Permian of Menorca (Balearic Islands, western Mediterranean), consisting of ichnites of small captorhinomorph eureptiles, probably moradisaurines (Hyloidichnus), and parareptiles (cf. Erpetopus), and bones of two different taxa of moradisaurines. The smallest of the two is not diagnostic beyond Moradisaurinae incertae sedis. The largest one, on the other hand, shows characters that are not present in any other known species of moradisaurine (densely ornamented maxillar teeth), and it is therefore described as Balearosaurus bombardensis gen. et sp. nov. Other remains found in the same outcrop are identified as cf. Balearosaurus bombardensis gen. et sp. nov., as they could also belong to the newly described taxon. This species is sister to the moradisaurine from the lower Permian of the neighbouring island of Mallorca, and is also closely related to the North American genus Rothianiscus. This makes it possible to suggest the hypothesis that the Variscan mountains, which separated North America from southern Europe during the Permian, were not a very important palaeobiogeographical barrier to the dispersion of moradisaurines. In fact, mapping all moradisaurine occurrences known so far, it is shown that their distribution area encompassed both sides of the Variscan mountains, essentially being restricted to the arid belt of palaeoequatorial Pangaea, where they probably outcompeted other herbivorous clades until they died out in the late Permian.

Models of salt-sediment interactions influencing the architecture of the Plio-quaternary deep-water sedimentary systems, Gulf of Lions-Western Mediterranean

2007 ◽  
Author(s):  
A. T. Reis ◽  
C. Gorini ◽  
W. Weilbull ◽  
C. Stratievsk ◽  
R. Perovano ◽  
...  
Keyword(s):  
Deep Water ◽  
Western Mediterranean ◽  
Gulf Of Lions

scholarly journals Composition and Distribution of Deep Water Macroalgae Species from the Continental Shelf of Sergipe State, Brazil

Phytotaxa ◽  
2014 ◽  
Vol 190 (1) ◽  
pp. 250 ◽  
Author(s):  
Sonia Maria Barreto Pereira ◽  
JULIANA TORRES ◽  
Lisia Monica de Souza Gestinari
Keyword(s):  
Continental Shelf ◽  
Deep Water ◽  
Number Of Species ◽  
Total Species ◽  
New Occurrences ◽  
Benthic Macroalgae

This study investigates the deep-water flora of the continental shelf in Sergipe State, Brazil located between 10º36’08’’ – 11º21’07’’S and 36º28’10’’ – 37º13’47’’W. The samples were collected by dragging at 18 sampling sites, between 10 to 30 m depth, from May 1999 to March 2000. A total of 91 taxa of marine benthic macroalgae were identified (56 Rhodophyta, 20 Heterokontophyta and 15 Chlorophyta). Forty-seven (47) of these are new occurrences for Sergipe flora. Rhodophyta dominated, accounting for 61% of the total species collected, with the order Ceramiales having the highest number of species present (39.55%), followed by Heterokontophyta (23%), mostly represented by Dictyotales (65%). Finally, 15 Chlorophyta taxa were found (16%), mainly composed of Bryopsidales (53%).

Lithology and sedimentary heterogeneity of the Longmaxi Shale in the southern Sichuan Basin, China

2021 ◽  
pp. 1-49
Author(s):  
Boling Pu ◽  
Dazhong Dong ◽  
Ning Xin-jun ◽  
Shufang Wang ◽  
Yuman Wang ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Deep Water ◽  
Shale Gas ◽  
Sichuan Basin ◽  
Sedimentary Environment ◽  
Gas Production ◽  
Carbonaceous Shale ◽  
Gas Wells ◽  
Longmaxi Shale ◽  
Siliceous Shale

Producers have always been eager to know the reasons for the difference in the production of different shale gas wells. The Southern Sichuan Basin in China is one of the main production zones of Longmaxi shale gas, while the shale gas production is quite different in different shale gas wells. The Longmaxi formation was deposited in a deep water shelf that had poor circulation with the open ocean, and is composed of a variety of facies that are dominated by fine-grained (clay- to silt-size) particles with a varied organic matter distribution, causing heterogeneity of the shale gas concentration. According to the different mother debris and sedimentary environment, we recognized three general sedimentary subfacies and seven lithofacies on the basis of mineralogy, sedimentary texture and structures, biota and the logging response: (1) there are graptolite-rich shale facies, siliceous shale facies, calcareous shale facies, and a small amount of argillaceous limestone facies in the deep - water shelf in the Weiyuan area and graptolite-rich shale facies and carbonaceous shale facies in the Changning area; (2) there are argillaceous shale facies and argillaceous limestone facies in the semi - deep - water continental shelf of the Weiyuan area and silty shale facies in the Changning area; (3) argillaceous shale facies are mainly developed in the shallow muddy continental shelf in the Weiyuan area, while silty shale facies mainly developed in the shallow shelf in the Changning area. Judging from the biostratigraphy of graptolite, the sedimentary environment was different in different stages.

A new species of the genus Rapturella (Gastropoda: Acteonidae) from southeast Brazil

Zootaxa ◽  
2018 ◽  
Vol 4521 (1) ◽  
pp. 125 ◽  
Author(s):  
CARLO M. CUNHA ◽  
LUIZ RICARDO L. SIMONE
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Deep Water ◽  
Shell Morphology ◽  
Southwest Pacific ◽  
Southeast Brazil ◽  
Pacific Waters ◽  
A New Species ◽  
High Diversity

Acteonidae d'Orbigny, 1843 is the largest family within the superfamily Acteonoidea (Bouchet et al. 2017) and includes small gastropods typical of infralittoral environments. Most acteonids living on the continental shelf or in deep water have been described on the basis of shell morphology alone (Simone 2006; Valdés 2008; Cunha 2011; Salvador & Cunha 2016), because little material with soft parts has been collected and examined. Consequently, little is known about the ecology of the species.  Recently, many new species of the genus Acteon Montfort, 1810 have been described from tropical Southwest Pacific waters (Valdés 2008), suggesting that a high diversity of acteonid species may await discovery in other deep water environments, including those of Brazil. 

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