Search results for "Peninsula"
showing 10 items of 293 documents
Regional climate model simulations for Europe at 6 and 0.2 k BP: sensitivity to changes in anthropogenic deforestation
2014
International audience; This study aims to evaluate the direct effects of anthropogenic deforestation on simulated climate at two contrasting periods in the Holocene, ∼ 6 and ∼ 0.2 k BP in Eu-rope. We apply the Rossby Centre regional climate model RCA3, a regional climate model with 50 km spatial resolution, for both time periods, considering three alternative descriptions of the past vegetation: (i) potential natural vegetation (V) simulated by the dynamic vegetation model LPJ-GUESS, (ii) potential vegetation with anthro-pogenic land use (deforestation) from the HYDE3.1 (History Database of the Global Environment) scenario (V + H3.1), and (iii) potential vegetation with anthropogenic land …
Taxonomic and nomenclatural novelties concerning the Valencian flora (eastern Spain), III
2014
Como parte de la Actualización taxonómica y nomenclatural de la flora vascular de la Comunidad Valenciana, se proponen cuatro combinaciones nuevas y una nueva subespecie, en los géneros Centaurea, Galium, Knautia, Lepidium y Satureja. As a part of the taxonomical and nomenclatural update of the vascular flora of the Valencian Community, four new nomenclatural combinations and one new subspecies name are proposed in the genera Centaurea, Galium, Knautia, Lepidium and Satureja.
Remote sensing of cyanobacterial blooms in a hypertrophic lagoon (Albufera of València, Eastern Iberian Peninsula) using multitemporal Sentinel-2 ima…
2018
Eutrophy in Albufera of Valencia (Eastern Iberian Peninsula) is a quite old problem since after the intense eutrophication processes throughout the 1960s. The system shifted to a turbid stable state consolidated by the virtual disappearance of macrophytes by the early 1970s. The lagoon has been studied extensively since the 1980s, but efforts to revert the system to a clear state have not yielded the expected results because cultural eutrophication due to the growth of population in its area of influence and the effects of climate change, decreasing rainfall and increasing evaporation. This has driven to an increase in water retention times in the lagoon in recent years, resulting in a phyt…
Migraciones y colonización de un territorio bajo disputa territorial en la Península de Yucatán, México / / / \ \ \ Migration and colonization of a t…
2020
Resumen: Desde la década de 1950 se llevó a cabo en México una política colonizadora con la idea de aprovechar los “espacios vacíos” ocupados por la selva, en zonas delicadas como son las fronterizas, y destinarlos a actividades productivas como lo son las agropecuarias. La apropiación que realizaron los pobladores del espacio y el uso del suelo son procesos socioeconómicos complementarios y complejos, ya que interactúan situaciones de orden natural y actividades antropogénicas; en consecuencia, su análisis debe considerar, entre otros elementos, a la población y la colonización que realizaron del área. El objetivo de este artículo es exponer cuáles fueron las motivaciones y circunstancias …
Permian-Triassic Rifting Stage
2019
International audience; The Permian-Triassic rifting represents the first of the two Mesozoic rifting stages recorded in the Iberian Peninsula. Its first phases of development started during the Early Permian, and were linked to the beginning of the break-up of Pangea, the large, unique and rheologically unstable supercontinent that mainly resulted from the collision of Gondwana and Laurussia. This chapter analyzes this first rifting stage in Iberia in two separate phases, an initial or tectonic phase, and a later mature phase. This analysis focuses on the main Permian-Triassic basins of the Iberian Peninsula: the Pyrenean, Iberian, Catalan, Ebro and Betic basins, as well as the basins loca…
Nouvelles données sur le genre Bragasellus (Crustacea: Isopoda: Asellidae
1996
From now on, the genus Bragasellus Henry & Magniez, 1968 includes 2 oculated and 17 stygobiotic species. As a natural and monophyletic taxonomic unit, we consider it a good genus. Its original area corresponds to the north-west quarter of the Iberian Peninsula. Secondarily, this area has extended eastward, using mainly the alluvial channels of hydrographic systems (Ríos Douro + Ebro and tributaries), finally reaching the underground waters of several Mediterranean rivers. This active expansion is exclusively due to the migration of two stygobiotic sibling species: B. lagari Henry & Magniez, 1973 towards the high basin of the Río Tajo, then downstream to the basins of the Ríos Jucar and Turi…
Where are you from, stranger? The enigmatic biogeography of North African pond turtles (Emys orbicularis)
2014
Abstract The European pond turtle (Emys orbicularis) is a Nearctic element in the African fauna and thought to have invaded North Africa from the Iberian Peninsula. All North African populations are currently identified with the subspecies E. o. occidentalis. However, a nearly range-wide sampling in North Africa used for analyses of mitochondrial and microsatellite DNA provides evidence that only Moroccan populations belong to this taxon, while eastern Algerian and Tunisian pond turtles represent an undescribed distinct subspecies. These two taxa are most closely related to E. o. galloitalica with a native distribution along the Mediterranean coast of northern Spain through southern France …
Molecular phylogeny of the genus Chondrina (Gastropoda, Panpulmonata, Chondrinidae) in the Iberian Peninsula
2022
[EN] Chondrina Reichenbach, 1828 is a highly diverse genus of terrestrial molluscs currently including 44 species with about 28 subspecific taxa. It is distributed through North Africa, central and southern Europe, from Portugal in the West to the Caucasus and Asia Minor in the East. Approximately 70% of the species are endemic to the Iberian Peninsula constituting its main center of speciation with 34 species. This genus includes many micro endemic taxa, some of them not yet described, confined to limestone habitats (being strictly rock-dwelling species). They are distributed on rocky outcrops up to 2000 m.a.s.l. It is a genus of conical-fusiform snails that differ mainly in shell characte…
Ancient mitochondrial DNA analyses of Iberian sturgeons
2009
Summary Today’s European sturgeons are relics of erstwhile widely distributed populations, diminished mainly by overfishing and habitat changes over the centuries. While extinct European populations in the Baltic and North seas have been identified as Acipenser oxyrhinchus or A. sturio, a clear species determination on the Iberian Peninsula is still lacking. Plans to conserve existing populations and to re-introduce extinct wild populations in European rivers will benefit from information of historic population/genotype composition. In this study, we used techniques involving ancient DNA as well as morphological comparisons based on bony scutes to identify twelve samples from five archaeolo…
Revisional Notes on Trictenotoma Gray, 1832 (Coleoptera: Trictenotomidae) in Indochina Bioregion, with Description of a New Species
2020
A review and species key to TrictenotomaGray, 1832 (Trictenotomidae Blanchard, 1845) from the Indochina bioregion, mainland Southeast Asia, is presented for the first time. Adults of Trictenotoma childreniGray, 1832, T. davidi Deyrolle, 1875 and T. mouhoti Deyrolle, 1875 are redescribed. Trictenotoma pollockisp. nov. from southern Vietnam is described and illustrated. A lectotype is designated for T. mouhoti Deyrolle, 1875.