scholarly journals Subtidal soft-bottom macroinvertebrate communities of the Canary Islands. An ecological approach

2012 ◽  
Vol 60 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Oscar Monterroso ◽  
Rodrigo Riera ◽  
Jorge Núñez
Keyword(s):  
Canary Islands ◽  
Ecological Approach ◽  
Macroinvertebrate Communities ◽  
Cymodocea Nodosa ◽  
Soft Bottom ◽  
Gran Canaria ◽  
La Palma ◽  
Diverse Communities ◽  
Soft Bottoms ◽  
Canarian Archipelago

The Canarian archipelago is characterized by a mosaic of soft-bottoms such as Cymodocea nodosa meadows, Caulerpa spp. meadows, mäerl bottoms, sabellid fields and bare sandy seabeds, including various macroinfaunal communities. Vegetated habitats (e.g. Cymodocea and Caulerpa) maintain more diverse communities than the non-vegetated seabeds. The results indicated that Caulerpa meadows and, to a lesser extent, Cymodocea nodosa and sabellid fields are the richest and most diverse ecosystems in the study area. Moreover, biodiversity differences among islands could be detected with maximum values on the eastern islands (Lanzarote and Gran Canaria) and lowest values on the western ones (La Palma).

Halimeda incrassata (Bryopsidales, Chlorophyta) reaches the Canary Islands: mid- and deep-water meadows in the eastern subtropical Atlantic Ocean

2018 ◽  
Vol 61 (2) ◽  
pp. 103-110 ◽  
Author(s):  
Carlos Sangil ◽  
Laura Martín-García ◽  
Julio Afonso-Carrillo ◽  
Jacinto Barquín ◽  
Marta Sansón
Keyword(s):  
Atlantic Ocean ◽  
Canary Islands ◽  
Deep Water ◽  
Population Coverage ◽  
Isolated Populations ◽  
La Palma ◽  
Soft Bottoms ◽  
The Caribbean ◽  
Marine Flora ◽  
First Time

AbstractExtensive offshore meadows ofHalimeda incrassataare documented for the first time in sandy bottoms of La Palma, Canary Islands.Halimeda incrassataforms dense sublittoral assemblages between 20 and 55 m, but isolated populations occur down to 65 m depth. This species currently spreads over an area of 9.14 ha. Population coverage varies with depth, with the highest values at 35–40 m and an average cover of 62.34%. The calcified segments ofH. incrassataact as a stable substratum in these soft bottoms for the growth of other macroalgae, such as the rhodophytesLophocladia trichocladosandCottoniella filamentosa. Specimens reach lengths of up to 10 cm, shorter than individuals from the Caribbean. Although it is difficult to ascertain whether this species is a recent introduction, there is evidence of a correlation between the increase in population coverage and recent ocean warming, constituting another example of the tropicalization of the marine flora of this region.

scholarly journals Endemics Versus Newcomers: The Ladybird Beetle (Coleoptera: Coccinellidae) Fauna of Gran Canaria

Insects ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 641
Author(s):  
Jerzy Romanowski ◽  
Piotr Ceryngier ◽  
Jaroslav Vĕtrovec ◽  
Marta Piotrowska ◽  
Karol Szawaryn
Keyword(s):  
New Species ◽  
Species Composition ◽  
Canary Islands ◽  
Field Survey ◽  
Gran Canaria ◽  
Ladybird Beetle ◽  
Ladybird Beetles ◽  
Points Of View ◽  
Available Information ◽  
Canarian Archipelago

Research on the fauna of beetles (Coleoptera) of the Canary Islands has a long tradition, which enables tracking changes in their species composition and arrival of new species. In this paper, we provide new faunistic data on the ladybird beetles (Coccinellidae) recorded on Gran Canaria, one of the central islands of the archipelago, and then analyze available information on the Gran Canarian ladybird fauna from geographical and historical points of view. The field survey resulted in recording 1402 ladybird individuals belonging to 30 species. Ten of these species were new to Gran Canaria and three of them, Chilocorus bipustulatus (Linnaeus), Nephus bisignatus (Boheman), and Nephus ulbrichi Fürsch, had not previously been reported to be on any of the islands of the Canarian archipelago. Tetrabrachys tinerfensis (Hodgson) is synonymized with T. deserticola (Wollaston). Our survey and literature reports allowed us to recognize 42 species of Coccinellidae so far recorded on Gran Canaria. Seventeen of them (40%) belonged to the Canarian endemic and subendemic species, and 21 (50%) were newcomers and presumed newcomers. Colonization of Gran Canaria and other islands of the archipelago by ladybird species of various origins seems to be a frequent phenomenon that may pose a threat to the unique communities of the native Canarian species.

Presence of Stenoponia tripectinata (Tiraboschi, 1902) (Siphonaptera, Ctenophtalmidae) in murine (Rodentia) from the Canary Islands

2012 ◽  
Vol 57 (2) ◽  
Author(s):  
Santiago Vicente ◽  
Maria Gómez López
Keyword(s):  
Canary Islands ◽  
North Africa ◽  
Mus Musculus ◽  
Rattus Rattus ◽  
Flea Species ◽  
Gran Canaria ◽  
El Hierro ◽  
La Palma ◽  
The Mediterranean ◽  
La Gomera

AbstractThis article reports the geographical and host distribution of the flea Stenoponia tripectinata on the Canary Islands. S. tripectinata is widely distributed throughout the Mediterranean and North Africa as a parasite of Muridae rodents. To date, Gran Canaria is the only island of the archipelago where S. tripectinata had been found. In this report, S. tripectinata has appeared parasitizing 116 specimens of Mus musculus out of a total of 660, and only 2 Rattus rattus of 215 captured. All the trapped Muridae hosts found to be parasitized by S. tripectinata came from humid biotopes. The results showed that S. tripectinata is present on all the western Canary Islands and on one of the eastern islands, Gran Canaria, the only island already reported. The detection of S. tripectinata on El Hierro, La Palma, La Gomera and Tenerife represents the first records of this flea species on those 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 New records of the land and freshwater molluscs of Gran Canaria (Canary Islands, Spain)

ZooKeys ◽  
2020 ◽  
Vol 985 ◽  
pp. 1-13
Author(s):  
Ward Langeraert ◽  
Dimitri Brosens
Keyword(s):  
Canary Islands ◽  
New Records ◽  
Life Stage ◽  
Public Domain ◽  
Gran Canaria ◽  
The Public ◽  
Freshwater Molluscs ◽  
Darwin Core ◽  
Canarian Archipelago ◽  
Scientific Name

“Land and freshwater molluscs of Gran Canaria (Spain)” is an occurrence dataset containing 389 observations of 59 different taxa of land and freshwater molluscs encountered on Gran Canaria, an island central in the Canarian archipelago (Spain). Of these 59 different (sub)species, 27 are with certainty currently endemic to the island of Gran Canaria. Various sites were inspected in a period between 1988 and 2020. The dataset is published as a standardized Darwin Core Archive and includes for each observation a stable occurrence ID, scientific name, date, and location of the observation, as well as information on life stage and organism quantity. It also contains supplementary remarks on the determination and the observation itself and links to associated media. We have released this dataset to the public domain under a CC0 1.0 Universal (CC0 1.0) Public Domain Dedication. The aim is to contribute to the knowledge on the ecology and distribution of these species on the island, such that it may aid conservation and research of these organisms in the future. Issues with the dataset can be reported at https://github.com/BelgianBiodiversityPlatform/landsnails-occurrences

Samples from the Jurassic ocean crust beneath Gran Canaria, La Palma and Lanzarote (Canary Islands)

1998 ◽  
Vol 163 (1-4) ◽  
pp. 343-360 ◽  
Author(s):  
Hans-Ulrich Schmincke ◽  
Andreas Klügel ◽  
Thor H. Hansteen ◽  
Kaj Hoernle ◽  
Paul van den Bogaard
Keyword(s):  
Canary Islands ◽  
Ocean Crust ◽  
Gran Canaria ◽  
La Palma

scholarly journals A Cryptic Invader of the Genus Persicaria (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 551
Author(s):  
Filip Verloove ◽  
Rainer Otto ◽  
Steven Janssens ◽  
Sang-Tae Kim
Keyword(s):  
Canary Islands ◽  
Its Region ◽  
Plastid Dna ◽  
Distinct Species ◽  
New Combination ◽  
Herbarium Specimens ◽  
Similar Species ◽  
Diagnostic Features ◽  
Gran Canaria ◽  
La Palma

A cryptic invader of the genus Persicaria has recently increased in the damper, northern parts of La Palma and Gran Canaria in the Canary Islands (Spain) and locally behaves as an invasive species. Examination of historical herbarium specimens showed this species to be present in Gran Canaria since the 1960s and the same probably applies to La Palma. Up to now, this species had been assigned to the Old World weed P. maculosa. However, morphologically, these plants clearly correspond with P. hydropiperoides, a common and widespread weed native to the New World, and indeed morphologically similar to P. maculosa. Diagnostic features for these two species, as well as for another similar species (P. decipiens, originally described from the Canary Islands), are compared, thoroughly discussed, and copiously illustrated. The current distribution, ecology, and naturalization status of P. hydropiperoides in the Canary Islands are also assessed. The variability of P. hydropiperoides is discussed, more precisely the taxonomic position of a southern ‘race’ of it that is sometimes referred to as a distinct species, P. persicarioides, and to which the Canarian plants belong. The taxonomic value of the latter appears to be clear, although at a lower level. A new combination, at varietal rank, is proposed and validated. In addition to our morphology-based study, a molecular phylogenetic analysis has been conducted on the nuclear ITS region and the plastid DNA region trnL-F.

scholarly journals A Cryptic Invader of the Genus Persicaria (Polygonaceae) in La Palma and Gran Canaria (Spain, Canary Islands)

2021 ◽  
Author(s):  
Filip Verloove ◽  
Otto Rainer ◽  
Steven Janssens ◽  
Sang-Tae Kim
Keyword(s):  
Canary Islands ◽  
Its Region ◽  
Plastid Dna ◽  
Distinct Species ◽  
Herbarium Specimens ◽  
Similar Species ◽  
Diagnostic Features ◽  
Gran Canaria ◽  
La Palma ◽  
Molecular Phylogenetic

A cryptic invader of the genus Persicaria is recently increasing in the damper, northern parts of La Palma and Gran Canaria in the Canary Islands (Spain) and locally behaves as an invasive species. Examination of historical herbarium specimens showed this species to be present in Gran Canaria since the 1960’s and the same probably applies to La Palma. Up to now, this species had been assigned to the Old World weed P. maculosa. However, morphologically these plants clearly correspond with P. hydropiperoides, a common and widespread weed native to the New World, and morphologically similar indeed to P. maculosa. Diagnostic features for these two species, as well as for another similar species (P. decipiens, originally described from the Canary Islands), are compared, thoroughly discussed and copiously illustrated. The current distribution, ecology and naturalization status of P. hydropiperoides in the Canary Islands are also assessed. The variability of P. hydropiperoides is discussed, more precisely the taxonomic position of a southern ‘race’ of it that is sometimes referred to as a distinct species, P. persicarioides. In addition to our morphology-based study, a molecular phylogenetic analysis has been conducted on the nuclear ITS region and the plastid DNA region trnL-F.

Temporal evolution of 3He/4He isotopic ratio at Dos Aguas cold mineral spring, La Palma, Canary Islands

2021 ◽  
Author(s):  
Eleazar Padrón ◽  
Nemesio M. Pérez ◽  
Gladys V. Melián ◽  
Hirochika Sumino ◽  
Mar Alonso ◽  
...  
Keyword(s):  
Canary Islands ◽  
Temporal Evolution ◽  
Volcanic Eruptions ◽  
Magma Reservoir ◽  
Maximum Magnitude ◽  
Mineral Spring ◽  
La Palma ◽  
Seismic Swarms ◽  
Cumbre Vieja ◽  
Canarian Archipelago

<p>Recent volcanic activity of La Palma island, the fifth in extension (706 km<sup>2</sup>) and the second in elevation (2,423 m a.s.l.) of the Canarian archipelago, has taken place exclusively in the last 123 ka at the southern part of the island, where Cumbre Vieja volcano, the most active basaltic volcano in the Canaries, has been constructed. A total of seven volcanic eruptions have been reported along the main north-south rift zone of Cumbre Vieja in the last 500 years. On October 7<sup>th</sup> and 13rd, 2017, two remarkable seismic swarms interrupted a seismic silence of 46 years in Cumbre Vieja volcano with earthquakes located beneath Cumbre Vieja volcano at depths ranging between 14 and 28 km with a maximum magnitude of 2.7. Five more seismic swarms were registered in 2020.</p><p><sup>3</sup>He/<sup>4</sup>He ratio has been monitored at Dos Aguas cold mineral spring in La Palma Island since 1991 to date as an important volcano monitoring tool able to provide early warning signal of future volcanic unrest episodes. Magmatic helium emission studies have demonstrated to be sensitive and excellent precursors of magmatic processes occurring at depth. The highest <sup>3</sup>He/<sup>4</sup>He ratio reported to date from the Canarian archipelago has been measured at Dos Aguas: 10.24 R<sub>A</sub> (being R<sub>A </sub>the ratio in atmospheric helium) (Padrón et al., 2015). This value is higher than any value found either in the lavas or terrestrial fluid in the Canary Islands, and indicates an important mantle contribution.<sup>  </sup>According to the temporal evolution of the magmatic component of helium at Dos Aguas, we suggest the occurrence of aseismic magma rising episodes beneath La Palma within the upper mantle towards an ephemeral magma reservoir in the period 2007-2017. However, in the period 2017-2020, magma rising have produced seismic swarms that were accompanied also by the highest <sup>3</sup>He/<sup>4</sup>He ratio measured at Dos Aguas (10.42 R<sub>A</sub>); both geochemical and geophysical signals confirm an upward magma migration towards a subcrustal magma reservoir beneath La Palma island.</p><p> </p><p>Padrón et al., (2015). Bull Volcanol 77:28. DOI 10.1007/s00445-015-0914-2</p>

scholarly journals The Amphipod Genus Pseudoniphargus (Crustacea) in the Canary Islands

1988 ◽  
Vol 58 (1) ◽  
pp. 47-78 ◽  
Author(s):  
Jan H. Stock
Keyword(s):  
Iberian Peninsula ◽  
Canary Islands ◽  
Systematic Sampling ◽  
Gran Canaria ◽  
El Hierro ◽  
La Palma ◽  
La Gomera

Pseudoniphargus was known from inland stygohabitats in the Iberian peninsula, the Azores, Madeira, N.W. Africa, and Bermuda, but not from the Canary Islands. Systematic sampling in six of the seven larger islands of the latter archipelago has revealed the presence of the genus in Tenerife (4 species), La Palma (2 species), La Gomera (1 species), and El Hierro (1 species). No Pseudoniphargus has been found in Lanzarote and Fuerteventura; Gran Canaria has not been sampled systematically.

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