Search results for "Peninsula"
showing 10 items of 293 documents
Climate change and population dynamics during the late Mesolithic and the Neolithic transition in Iberia
2009
This paper explores how Early Holocene climate changes in the Western Mediterranean would have affected Late Mesolithic settlement distribution and subsistence strategies in Iberian Peninsula, thereby giving rise to various adaptive scenarios. The current radiocarbon data set concerning the Neolithisation process has revealed the rapidity of the spread of farming in Iberia. Considering both the implications of the last hunter-gatherers’ adaptation strategies and the population dynamics of agro-pastoral communities, we address the migration patterns underlying the Mesolithic- Neolithic transition. In conclusion, we propose that the initial colonization process was the result of two successiv…
Bacterioplankton Community Composition Along Environmental Gradients in Lakes From Byers Peninsula (Maritime Antarctica) as Determined by Next-Genera…
2019
This study comprises the first attempt to describe the planktonic bacterial communities of lakes from Byers Peninsula, one of the most significant limnological districts in the Maritime Antarctica, leveraging next-generation sequencing (NGS) technologies. For the survey, we selected 7 lakes covering the environmental gradient from inland to coastal lakes, some of them sampled both in surface and deep waters. Analysis provided just over 85,000 high quality sequences that were clustered into 864 unique Zero-radius Operational Taxonomic Units (ZOTUs) (i.e., 100% sequence similarity). Yet, several taxonomic uncertainties remained in the analysis likely suggesting the occurrence of local bacteri…
Functional Metabolic Diversity of Bacterioplankton in Maritime Antarctic Lakes
2021
A summer survey was conducted on the bacterioplankton communities of seven lakes from Byers Peninsula (Maritime Antarctica), differing in trophic and morphological characteristics. Predictions of the metabolic capabilities of these communities were performed with FAPROTAX using 16S rRNA sequencing data. The versatility for metabolizing carbon sources was also assessed in three of the lakes using Biolog Ecoplates. Relevant differences among lakes and within lake depths were observed. A total of 23 metabolic activities associated to the main biogeochemical cycles were foreseen, namely, carbon (11), nitrogen (4), sulfur (5), iron (2), and hydrogen (1). The aerobic metabolisms dominated, althou…
The origin of Swedish and Norwegian populations of the Eurasian harvest mouse (Micromys minutus).
2012
The harvest mouse (Micromys minutus) occurs throughout most of continental Europe. There are also two isolated and recently discovered populations on the Scandinavian peninsula, in Sweden and Norway. Here, we investigate the origin of these populations through analyses of mitochondrial DNA. We found that the two populations on the Scandinavian peninsula have different mtDNA haplotypes. A comparison of our haplotypes to published sequences from most of Europe showed that all Swedish and Norwegian haplotypes are most closely related to the haplotypes in harvest mice from Denmark. Hence, the two populations seem to represent independent colonisations but originate from the same geographical ar…
About the finding of the invasive geomitrid Xerolenta obvia (Menke, 1828) (Mollusca, Stylommatophora) in Andorra.
2022
An invasive snail population of Xerolenta obvia was discovered at the end of 2021 in Sant Julià de Lòria (Principat d'Andorra). This location, the first occurrence of this species for this country, is intermediate between the few locations in the south of France and the only known location in Spain. For its taxonomical determination, morpho-anatomical studies of the shell and the reproductive system have been carried out, and it has been compared with other species of geomitrids that are more similar based on the shell, such as Cernuella neglecta or Helicella itala and even, for less expert people, with Xerosecta cespitum arigonis, also present in Andorra. X. obvia is an i…
Characterization of the land snail Ganula lanuginosa (Boissy, 1835) (Mollusca: Hygromiidae): new invader of the Iberian Peninsula.
2021
Recently, a well-established population of the hygromiid Ganula lanuginosa has been discovered in the Iberian Peninsula, specifically in Xàtiva (Province of Valencia, Spain), corresponding to the first record for the Iberian Peninsula and the Continental Europe. It is a land snail native to North Africa and also known from the European Mediterranean islands, namely the Balearic Islands (Spain), Sardinia (Italy) and Corsica (France). Morpho-anatomical studies of the shell and the reproductive system have been carried out, and these features have been compared with those of the most similar hygromiids, which has allowed us to correctly identify them. In addition, parasitological and ec…
Oenothera laciniata Hill (Onagraceae) en la Comunidad Valenciana
2012
Se da a conocer la presencia de la especie naturalizada Oenothera laciniata, como novedad para la flora de la Comunidad Valenciana (E de España); a la vez que constituye su segunda indicación reciente para la Península Ibérica. Se trata de una planta alóctona, nativa de la mitad oriental de Norteamérica, que debe ser considerada como potencial invasora de los ecosistemas mediterráneos. Se ofrecen datos morfológicos para facilitar la identificación de la especie y la futura detección de nuevas poblaciones. Además, se aporta una clave de identificación de las especies valencianas del género. Oenothera laciniata is reported for the first time in the Valencian Community (E of Spain), a report t…
The Gravettian occipital bone from the site of Malladetes (Barx, Valencia, Spain)
2002
Abstract The juvenile occipital bone from the site of Malladetes in Valencia (Spain) is described and compared with other European Pleistocene representatives of the genus Homo . This specimen derives from a Gravettian cultural context and has been AMS radiocarbon-dated to 25,120±240 years bp . As such, it provides evidence on early modern human anatomy from the Central Mediterranean region of the Iberian peninsula. The clear evidence for a late survival of Neandertals in southern Iberia, has led to considerable debate surrounding the biological and cultural interactions between these Pleistocene humans and their early modern human successors, and it is within this context that the Malladet…
Archaeology, chronology, and age-diet insights of two late fourth millennium cal BC pit graves from central southern Iberia (Córdoba, Spain)
2020
This study presents the isotopic ratios, radiocarbon datings, and anthropological analyses of five (N = 5) Early Copper Age individuals from two archaeological sites (Arruzafa and Iglesia Antigua de Alcolea) of the Middle Guadalquivir Valley near the city of Córdoba (Spain). Four had been buried in the same grave, possibly in a single event or in a very short time lapse. The collagen residue analyses of the individuals offer δC values ranging between −20.08 and −18.4 and δN values between 8.57 and 11.15. The findings indicate that the infant and the elderly had, respectively, the richest and poorest animal protein diets, the first likely as a result of nursing. The combined study of these f…
Elementos líticos apuntados en el yacimiento de Paleolítico Medio del Abrigo de la Quebrada (Chelva, Valencia): Caracterización tecno-tipológica y an…
2015
En este trabajo se analizan los objetos líticos apuntados recuperados en el Abrigo de la Quebrada. Para ello, el estudio parte del análisis tecnológico, tipológico y tipométrico de los soportes sobre los que se confeccionó este utillaje, además de una primera aproximación al estudio de las macrohuellas y fracturas detectadas. Los datos obtenidos se comparan con otros del ámbito regional, con el objetivo de aportar nueva información en torno a las capacidades cinegéticas de los grupos neandertales.