scholarly journals Geographic Distribution of Archaeal Ammonia Oxidizing Ecotypes in the Atlantic Ocean

2016 ◽  
Vol 7 ◽  
Author(s):  
Eva Sintes ◽  
Daniele De Corte ◽  
Elisabeth Haberleitner ◽  
Gerhard J. Herndl
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution

First record of Polyneura bonnemaisonii (Delesseriaceae, Rhodophyta) from the Atlantic Ocean of Africa

2015 ◽  
Vol 8 ◽  
Author(s):  
Mustapha Hassoun ◽  
Hanaa Moussa ◽  
Hanaa Zbakh ◽  
Hassane Riadi ◽  
Mohamed Kazzaz ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Related Species ◽  
Algal Species ◽  
First Record ◽  
Closely Related Species ◽  
North West ◽  
Red Algal ◽  
First Time

A red algal species,Polyneura bonnemaisonii(Delesseriaceae, Rhodophyta), is described for the first time in the Atlantic Ocean of Morocco. This is also the first reference of the occurrence of this species in Africa. This species was collected in the lower intertidal to subtidal zones, from Hyayda (north-west of Morocco). The Moroccan specimen is studied in detail and compared with other closely related species. Habitat, geographic distribution, description and illustration of the macroscopic and microscopic characters are presented and discussed in this work.

scholarly journals Chondrophycus anabeliae and Laurencia digitata (Ceramiales, Rhodophyta) are recorded for the first time for Venezuela expanding their geographic distributions beyond the type localities

2020 ◽  
Vol 98 (4) ◽  
pp. 624-643
Author(s):  
Valéria Cassano ◽  
Luanda P. Soares ◽  
Beatriz Esther Vera-Vegas ◽  
Sonia Ardito ◽  
Santiago Gómez ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Species Diversity ◽  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Dna Barcode ◽  
Rbcl Gene ◽  
Molecular Studies ◽  
Anatomical Characters ◽  
First Time ◽  
High Diversity

Background: Over the course of approximately 12 years, the species of the Laurencia complex have been systematically studied in the tropical and subtropical Atlantic Ocean, showing high diversity (48 species), which has been underestimated for the coast of Venezuela. Questions: What is the species diversity of the Laurencia complex in Venezuela? Studied species: Chondrophycus anabeliae, Laurencia digitata. Study site and dates: Cayo Muerto, Parque Nacional Morrocoy, Estado Falcón, Venezuela, 2015. Methods: For molecular studies, the plastid rbcL gene and the mitochondrial DNA barcode marker COI-5P were used, combined with the study of current morpho-anatomical characters used for the identification of the species of the complex. Results: The occurrence of Chondrophycus, as currently circumscribed, was confirmed for the first time for Venezuela. Chondrophycus anabeliae and Laurencia digitata are reported for the first time beyond the type localities. Tetrasporophytes are described for the first time for L. digitata. Conclusions: Our findings expand the geographic distribution of Ch. anabeliae and L. digitata for the Venezuelan Caribbean and the Atlantic Ocean, respectively.

scholarly journals First record of Flabellina dana Millen and Hamann, 2006 (Mollusca: Nudibranchia) in the South Atlantic Ocean

Check List ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 880 ◽  
Author(s):  
Licia Sales ◽  
Marlon Delgado ◽  
Vinicius Queiroz ◽  
Vinicius Padula ◽  
Cláudio L. S. Sampaio ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Caribbean Sea ◽  
First Record ◽  
South Atlantic ◽  
South Atlantic Ocean ◽  
Brazilian Coast ◽  
The South ◽  
The Bahamas ◽  
The Caribbean

The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the northeastern Brazilian coast. These are the first records of this species, previously recorded from localities in the Bahamas and the Caribbean Sea, in South Atlantic Ocean, extending its known geographic distribution more than 3500 km southward.

Global climate changes over time shaping the environmental niche distribution of Octopus insularis (Cephalopoda: Octopodidae) in the Atlantic Ocean

2020 ◽  
Author(s):  
Françoise D Lima ◽  
Luis Enrique Ángeles-González ◽  
Tatiana S Leite ◽  
Sergio MQ Lima
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Climate Changes ◽  
Global Climate ◽  
Trophic Chain ◽  
Future Scenarios ◽  
Climatic Niche ◽  
Global Climate Changes ◽  
Climatic Scenarios ◽  
Over Time

In the Atlantic Ocean, Octopus insularis Leite and Haimovici, 2008 inhabits warm and shallow habitats, where it is one of the main targets of cephalopod fisheries. Considering the current trend of increase of increasing sea-water temperature, warm-water species are expected to expand their geographic distribution range. Ecological niche modeling (ENM) is an important tool to help describe likely changes in geographic distribution patterns of a species in many climatic scenarios. To evaluate the changes of O. insularis distribution over time, the Maximum Entropy approach was used, which estimated a suitable climatic niche for Octopus under five scenarios of global climate changes. Six environmental layers were chosen to model the modern suitable climatic niche of O. insularis and four variables were used for past and future scenarios. The ENM in different climatic scenarios showed good validation and pointed out an increase of the suitable niche for O. insularis settlement, from Last Glacial Maximum (21 Kya) up to future scenarios. In the future projections, the availability of species suitable niche will potentially increase in Tropical Atlantic compared to the current distribution. In addition, the modeling pointed out the possibility of an expansion from the species current range to Temperate Northern Atlantic, Temperate South America, and Temperate South Africa. This may cause potential threats, such as possible extinction of endemic species, habitat displacement of native octopuses, reorganizations in the trophic chain.

scholarly journals First occurrence of the family Paralacydoniidae (Annelida: Polychaeta) in the South Atlantic Ocean

2007 ◽  
Vol 7 (1) ◽  
pp. 39-42 ◽  
Author(s):  
Alexandra Elaine Rizzo ◽  
Antonia Cecília Zacagnini Amaral
Keyword(s):  
Atlantic Ocean ◽  
Gulf Of Mexico ◽  
Continental Slope ◽  
Geographic Distribution ◽  
North Atlantic ◽  
The South ◽  
The North ◽  
The Family ◽  
First Occurrence ◽  
The North Atlantic

Paralacydoniid polychaetes belonging to the genus Paralacydonia Fauvel 1913 were collected during the REVIZEE Program/South Score/Benthos ("Avaliação do Potencial Sustentável dos Recursos Vivos na Zona Econômica Exclusiva") on the outer shelf and continental slope off the south-southeastern coast of Brazil between 156 and 400 m depth. This new report extends the known geographic distribution of the family, which had previously been recorded in the North Atlantic as far as the Gulf of Mexico. Paralacydonia is here treated as monotypic; P. mortenseni Augener 1924 and P. weberi Horst 1923 are considered synonyms of Paralacydonia paradoxa Fauvel 1913.

Global climate changes over time shape the environmental niche distribution of Octopus insularis in the Atlantic Ocean

2020 ◽  
Vol 652 ◽  
pp. 111-121
Author(s):  
FD Lima ◽  
LE Ángeles-González ◽  
TS Leite ◽  
SMQ Lima
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Global Climate ◽  
Seawater Temperature ◽  
Trophic Chain ◽  
Future Scenarios ◽  
Climatic Niche ◽  
Distribution Ranges ◽  
Climatic Scenarios ◽  
Over Time

In the Atlantic Ocean, Octopus insularis (Cephalopoda: Octopodidae) Leite and Haimovici, 2008 inhabits warm and shallow habitats, where it is one of the main targets of cephalopod fisheries. Considering the current trend of increasing seawater temperature, warm-water species are expected to expand their geographic distribution ranges. Ecological niche modeling (ENM) is an important tool to help describe likely changes in geographic distribution patterns of a species in different climatic scenarios. To evaluate changes in the distribution of Octopus insularis over time, the maximum entropy approach was used, which estimated a suitable climatic niche for Octopus under 5 scenarios of global climate change. Four environmental variables were chosen to model the suitable climatic niche of O. insularis in the present, past, and future scenarios. The ENM in different climatic scenarios showed good validation and pointed out an increase of the suitable niche for O. insularis settlement, from the Last Glacial Maximum (21 kya) up to future scenarios. In the future projections, suitable niche space will potentially increase in the tropical Atlantic compared to the current distribution. Modeling pointed out the possibility of expansion from the current range of the species to the temperate northern Atlantic, temperate South America, and temperate South Africa. This may cause potential threats, such as possible extinction of endemic species, habitat displacement of native octopuses, and reorganizations in the trophic chain.

Distribution of Albian clastic deposits in the Benguela basin (Angola): evidence of a Benguela palaeocurrent?

2009 ◽  
Vol 180 (2) ◽  
pp. 117-129 ◽  
Author(s):  
Didier Quesne ◽  
André Buta-Neto ◽  
Dominique Benard ◽  
Michel Guiraud
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Longshore Current ◽  
Striking Resemblance ◽  
Benguela Current ◽  
Marine Current

Abstract The Albian clastic Tuenza Formation of the Benguela basin (south Angola) is described and its geographic distribution analysed in detail. From these observations, the existence of an Albian “PalaeoBenguela current” is proposed. This would imply that a marine longshore current reworked the sand transported by palaeorivers and settled it northward along the coast of the young Atlantic Ocean (during the Albian). A parallel between Albian clastic deposits and the modern sediments deposited by the Benguela current is drawn, focusing on the striking resemblance between the two currents, i.e. the actual Benguela current and the Albian marine current, and the associated sedimentary bodies.

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