A giant landslide on the north flank of Tenerife, Canary Islands

1995 ◽  
Vol 100 (B12) ◽  
pp. 24487-24498 ◽  
Author(s):  
A. B. Watts ◽  
D. G. Masson
Keyword(s):  
Canary Islands ◽  
The North ◽  
Giant Landslide

The Coccinellidae (Coleoptera) from Fuerteventura, Canary Islands

Zootaxa ◽  
2019 ◽  
Vol 4646 (1) ◽  
pp. 101-123 ◽  
Author(s):  
JERZY ROMANOWSKI ◽  
PIOTR CERYNGIER ◽  
JAROSLAV VĚTROVEC ◽  
KAROL SZAWARYN
Keyword(s):  
Canary Islands ◽  
Coccinella Septempunctata ◽  
North African ◽  
The North ◽  
Ladybird Beetles

During this study, Coccinellidae were collected and observed at 25 sites located along the coast and inland of the island of Fuerteventura during 2016 and 2017. A total of 2825 Coccinellidae specimens belonging to 22 species was recorded, of which 11 species are newly recorded from Fuerteventura. In the case of three species taxonomical decisions are proposed. Scymnus incisus (Har. Lindberg, 1950) is transferred to the genus Nephus Mulsant and placed in the nominate subgenus as Nephus (Nephus) incisus (Har. Lindberg, 1950), comb. nov. Scymnus medanensis Eizaguirre, 2007, is redescribed and placed in the subgenus Pullus Mulsant. Coccinella algerica Kovář, 1977, is synonymized with Coccinella septempunctata Linnaeus, 1758, syn. nov. We propose retaining the taxonomic distinction of the North African and Canarian populations of this species as the subspecies Coccinella septempunctata algerica Kovář, stat. nov. Nephus peyerimhoffi (Sicard, 1923) is deleted from the list of ladybird beetles inhabiting the Canary Islands. 

Relation between the type of wave exposure and seagrass losses (Cymodocea nodosa) in the south of Gran Canaria (Canary Islands — Spain)

2014 ◽  
Vol 43 (1) ◽  
Author(s):  
Eduardo Portillo
Keyword(s):  
Canary Islands ◽  
Qualitative Evaluation ◽  
Cymodocea Nodosa ◽  
The South ◽  
Frictional Drag ◽  
Winter Storms ◽  
Gran Canaria ◽  
Seagrass Meadows ◽  
The North ◽  
Storm Waves

AbstractEffects of different types of wave events on Cymodocea nodosa seagrass meadows were observed and investigated by quantitative and qualitative evaluation of material washed ashore a few days after the events. The studied seagrass meadows are located on the south coast of the island of Gran Canaria (Canary Islands — Spain) and they are protected from frequent swells arriving from the North Atlantic. However, sporadic phenomena associated with winter storms occasionally hit this coastline, causing the loss of entire plants (fresh leaves with rhizomes and roots attached). An unusual type of southern swells generated in the South Atlantic also reaches the Islands in spring and summer. A clear relation was observed between the wave events (southern swells and storm waves) and the material cast ashore over the following days, with differences in composition (fresh vs. decaying leaves) depending on the type of event. After southern swells, detached portions of C. nodosa consisted mostly of decaying leaves shed after senescence. These old swells cause frictional drag with moderate oscillations over a wider range at greater depths, removing only decaying leaves from the seagrass meadows and favoring the natural clean-up process.

scholarly journals True´s beaked whale (Mesoplodon mirus) in Macaronesia

2016 ◽  
Author(s):  
Natacha Aguilar de Soto ◽  
Vidal Martín ◽  
Monica Silva ◽  
Roland Edler ◽  
Cristel Reyes ◽  
...  
Keyword(s):  
Canary Islands ◽  
North Atlantic ◽  
Atlantic Coast ◽  
Beaked Whale ◽  
Gene Markers ◽  
Southern Limit ◽  
The North ◽  
Tasman Sea ◽  
Beaked Whales ◽  
The North Atlantic

The True´s beaked whale (Mesoplodon mirus, True 1913) is a poorly studied member of the speciose Ziphiidae family. Its distribution in the North Hemisphere is thought to be restricted to the temperate or warm temperate waters of the North Atlantic, while a small number of stranding records from the Southern Hemisphere suggest a wider distribution, extending from the Atlantic coast of Brazil to South Africa, Australia and the Tasman Sea coast of New Zealand. Here we i) report the first molecular confirmation of the occurrence of True´s beaked whales around the Azores and Canary Islands (Macaronesian ecoregion), the species’ southern limit in the northeast Atlantic; ii) describe a new colouration for this species; and iii) contribute to the sparse worldwide database of live sightings, including the first underwater video, of this species. In November 2012, a 390 cm male True’s beaked whale stranded in El Hierro, Canary Islands. In July 2004, a subadult male True’s beaked whale was found floating dead near Faial, Azores. Species identification was confirmed in both cases using mitochondrial DNA control region and cytochrome b gene markers. The whale that stranded in the Canary Islands had a clearly delimited white area on its head, extending posteriorly from the tip of the beak to cover the blowhole dorsally and the gular grooves ventrally. This colouration contrasts with previous descriptions for the species and it may be rare, but it demonstrates that True´s beaked whales show variable colourations in the North Atlantic. This is confirmed by sightings data. Given the presence of this species around the Azores and the Canary Islands, it would be expected that True´s beaked whales also occur in the area between these archipelagos, including the islands of Madeira.

scholarly journals True´s beaked whale (Mesoplodon mirus) in Macaronesia

2016 ◽  
Author(s):  
Natacha Aguilar de Soto ◽  
Vidal Martín ◽  
Monica Silva ◽  
Roland Edler ◽  
Cristel Reyes ◽  
...  
Keyword(s):  
Canary Islands ◽  
North Atlantic ◽  
Atlantic Coast ◽  
Beaked Whale ◽  
Gene Markers ◽  
Southern Limit ◽  
The North ◽  
Tasman Sea ◽  
Beaked Whales ◽  
The North Atlantic

The True´s beaked whale (Mesoplodon mirus, True 1913) is a poorly studied member of the speciose Ziphiidae family. Its distribution in the North Hemisphere is thought to be restricted to the temperate or warm temperate waters of the North Atlantic, while a small number of stranding records from the Southern Hemisphere suggest a wider distribution, extending from the Atlantic coast of Brazil to South Africa, Australia and the Tasman Sea coast of New Zealand. Here we i) report the first molecular confirmation of the occurrence of True´s beaked whales around the Azores and Canary Islands (Macaronesian ecoregion), the species’ southern limit in the northeast Atlantic; ii) describe a new colouration for this species; and iii) contribute to the sparse worldwide database of live sightings, including the first underwater video, of this species. In November 2012, a 390 cm male True’s beaked whale stranded in El Hierro, Canary Islands. In July 2004, a subadult male True’s beaked whale was found floating dead near Faial, Azores. Species identification was confirmed in both cases using mitochondrial DNA control region and cytochrome b gene markers. The whale that stranded in the Canary Islands had a clearly delimited white area on its head, extending posteriorly from the tip of the beak to cover the blowhole dorsally and the gular grooves ventrally. This colouration contrasts with previous descriptions for the species and it may be rare, but it demonstrates that True´s beaked whales show variable colourations in the North Atlantic. This is confirmed by sightings data. Given the presence of this species around the Azores and the Canary Islands, it would be expected that True´s beaked whales also occur in the area between these archipelagos, including the islands of Madeira.

scholarly journals Modeling the Exposure of the Macaronesia Islands (NE Atlantic) to Marine Plastic Pollution

2021 ◽  
Vol 8 ◽  
Author(s):  
Cláudio Cardoso ◽  
Rui M. A. Caldeira
Keyword(s):  
Canary Islands ◽  
North Atlantic ◽  
Gulf Stream ◽  
Oceanic Islands ◽  
Subtropical Gyre ◽  
Plastic Pollution ◽  
Cabo Verde ◽  
The North ◽  
African Coast ◽  
The North Atlantic

The constant increase of marine plastic pollution poses an unprecedented risk to oceanic islands, which become increasingly exposed to a hazard of which they have very little control. Located in the Northeast Atlantic Ocean, the Macaronesia is comprised by the Azores, Madeira, Canary Islands, and Cabo Verde. Although past studies suggest that most plastic items collected on these islands are from offshore regions, their actual sources remain unclear to present date. As such, we focus on the characterization of the potential sources and pathways of plastic particles reaching the Macaronesia archipelagos. This is achieved by combining modeled datasets for ocean currents, winds and waves with a Lagrangian tool used to track virtual particles released around the archipelagos for a 10-year period, making a distinction between surface and submerged particles. Global drifter trajectories are also assessed, selecting those that intercept the archipelagos. Our results demonstrate that the North Atlantic subtropical gyre is the most conspicuous feature in particles and drifter trajectories. The Gulf Stream acts as the main pathway for all archipelagos at a regional scale, though with less significance to Cabo Verde. Surface particles are connected to regional sources in a shorter timescale than mixed particles, mainly because of the wind. Intercepting high-windage particle trajectories are dominant at the center of the North Atlantic subtropical gyre, demonstrating that particles originating from the North Atlantic “garbage patch” are most likely to intercept the archipelagos if considerably exposed to the wind. Regarding the connectivity to sources, all archipelagos are significantly exposed to areas of intensive fishing activity, mainly those located in the Gulf Stream (Azores), in international waters off the Portuguese coast (Madeira and Canary Islands) and along the Northwestern African coast (Cabo Verde). The east coasts of Central and North America are the main sources of land-based particles reaching the Azores, Madeira, and Canary Islands, whereas the Northwestern African coast is the main source for land-based particles reaching Cabo Verde. Our results demonstrate how vulnerable the Macaronesian archipelagos are to marine plastic pollution, highlighting the urgency for international cooperation to mitigate the exposure of oceanic islands to marine plastic pollution.

scholarly journals Population-specific responses in physiological rates of <i>Emiliania huxleyi</i> to a broad CO<sub>2</sub> range

2018 ◽  
Author(s):  
Yong Zhang ◽  
Lennart T. Bach ◽  
Kai T. Lohbeck ◽  
Kai G. Schulz ◽  
Luisa Listmann ◽  
...  
Keyword(s):  
Canary Islands ◽  
Incubation Temperature ◽  
North Atlantic Ocean ◽  
Physiological Responses ◽  
Maximum Growth ◽  
Emiliania Huxleyi ◽  
Carbonate Chemistry ◽  
Production Rates ◽  
Co2 Partial Pressure ◽  
The North

Abstract. Although coccolithophore physiological responses to CO2-induced changes in seawater carbonate chemistry have been widely studied in the past, there is limited knowledge on the variability of physiological responses between populations. In the present study, we investigated the population-specific responses of growth, particulate organic (POC) and inorganic carbon (PIC) production rates of 17 strains of the coccolithophore Emiliania huxleyi from three regions in the North Atlantic Ocean (Azores, Canary Islands, and Norwegian coast near Bergen) to a CO2 partial pressure (pCO2) range from 120 µatm to 2630 µatm. Physiological rates of each population and individual strain displayed the expected optimum curve responses to the pCO2 gradient. Optimal pCO2 for growth and POC production rates and tolerance to low pH (i.e. high proton concentration) was significantly higher in an E. huxleyi population isolated from a Norwegian fjord than in those isolated near the Azores and Canary Islands. This may be due to the large pCO2 and pH variability in coastal waters off Bergen compared to the rather stable oceanic conditions at the other two sites. Maximum growth and POC production rates of the Azores and Bergen populations were similar and significantly higher than of the Canary Islands population. One of the reasons may be that the chosen incubation temperature (16 °C) is slightly below what strains isolated near the Canary Islands normally experience. Our results indicate adaptation of E. huxleyi to their local environmental conditions. Within each population, different growth, POC and PIC production rates at different pCO2 levels indicated strain-specific phenotypic plasticity. The existence of distinct carbonate chemistry responses between and within populations will likely benefit E. huxleyi to acclimate to rising CO2 levels in the oceans.

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