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Population genetic structure of the tree-hole tick Ixodes arboricola (Acari: Ixodidae) at different spatial scales
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Predominance of a single phylogenetic species in colonization events among a sextet of decollate land snail, Rumina decollata (Mollusca: Pulmonata: Subulinidae), species
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Parentage analyses suggest female promiscuity and a disadvantage for athletic males in the colourpolymorphic lizard Podarcis melisellensis
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Dog mitochondrial genome sequencing to enhance dog mtDNA discrimination power in forensic casework
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Holocene palaeoecology and human environmental interactions at the coastal Black Sea Lake Durankulak, northeastern Bulgaria
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The environmental changes (vegetation history, human impact and land use, influence of the Black Sea) in the area of Lake Durankulak, northeastern Bulgaria, were reconstructed and synthesized for the last ca. 8000 years. The palaeoecological information derived from various proxies (pollen, plant macrofossils, molluscs, sediments) was compared on a regional scale with the evidence from the nearby coastal lakes ShablaeEzeretz and Bolata. The Early Holocene xerothermic steppe vegetation, dominated by Chenopodiaceae, Artemisia and Poaceae species, and accompanied by stands of trees in moister habitats, was transformed after 6000 cal. BP into a forest-steppe, comprising oak woods with Carpinus betulus, Ulmus, Tilia, Acer. This vegetation pattern has been periodically modified, depleted and replaced by arable land or xerothermic herbaceous communities enriched with anthropophytes and ruderals, particularly after the intensification of human activities since 3300 cal. BP. The archaeobotanical evidence from the region has provided valuable information about the occupation phases and subsistence strategy of the local people since the Late Neolithic (5300 cal. BC/7250 cal. BP). Periods with cultivation of cereals (Triticum, Hordeum) and/or stock-breeding activity were interrupted by abandonment of the settlements and the arable land due to unfavourable environmental changes. The periodical connection/isolation of Lake Durankulak with the Black Sea and the periods of marine influence were recorded by changes in the composition of the fossil molluscan fauna and the lithology of the sediments, and chronologically confirmed by radiocarbon dates. The development of the coastal lakes throughout the largest part of the Holocene has been also considerably influenced by the fluctuations of the Black Sea level.
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Plant use and local vegetation patterns during the second half of the Late Pleistocene in southwestern Germany
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In light of recent discoveries of early figurative art in Paleolithic sites of southwestern Germany, gaining an improved understanding of biological, cultural, and social development of these hunter-gatherer populations under past environmental conditions is essential. The analysis of botanical micro- and macrofossils from the Hohle Fels Cave contributes to the limited floral record from this region. These data suggest generally open vegetation, with the presence of wood near Hohle Fels, as indicated by pollen, phytoliths, and evidence from wood charcoal throughout the whole sequence of occupation. The Aurignacian horizons (early Upper Paleolithic, starting around 44,200 calibrated years before present (cal yr BP) correlate with prevailing shrub tundra. Few arboreal pollen in the transitional section from the Aurignacian to the Gravettian horizons (middle Upper Paleolithic, until ca. 32 cal yr BP) supports the model of an interglacial tundra with a mosaic of cold steppe elements and some patches of woody species. In the Gravettian, the macrobotanical and the palynological records indicate colder climatic conditions and a generally reduced presence of wood patches. Few seed remains, mostly of the Asteraceae and Poaceae families suggesting the use of these plants. The collection of bearberry (Arctostaphylos sp.) for specific purposes is indicated by large amounts of bark fragments.
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Tracking ancient ship routes through the analysis of caulking material from shipwrecks? The case study of two 14th century cogs from Doel (northern Belgium).
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A reconstruction of middle Holocene alluvial hardwood forests (Lower Scheldt River, northern Belgium) and their exploitation during the Mesolithic-Neolithic transition period (Swifterbant Culture, ca. 4500 – 4000 BC).
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The analysis of a large number of charcoal fragments from fire places from a wetland camp site of the Mesolithic-Neolithic transition period (Swifterbant culture) now permits a detailed reconstruction of a middle Holocene riverine forest along the Lower Scheldt River (northern Belgium) and its exploitation between ca. 4,500 and 4,000 BC. The identified taxa point towards an alluvial hardwood forest (Querco-Ulmetum minoris Issler 1924) on the sand dune on which the camp site was situated, surrounded by alder carr. The results are compared with palynological and macrobotanical analyses from the same site and from contemporary sites within the area; the complementarity of these different types of data is discussed. The combination of all these datasets results in a detailed reconstruction of the environment and of its exploitation by the Swifterbant culture. The results also show that the Swifterbant people not only depended on these sand ridges for dry settlement locations, but also for firewood collection, gathering of edible plants and most probably for the collection of leaf fodder to feed livestock during winter time.
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Late Quaternary (15 ka to present) development of a sandy landscape in the Mol area, Campine region, NE Belgium
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A new species of Groenlandaspis Heintz, 1932 (Placodermi, Arthrodira) from the Famennian (Late Devonian) of Belgium
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A new species of the phlyctaeniid arthrodire genus Groenlandaspis from the upper Famennian of Belgium is described. The remains of Groenlandaspis potyi sp. nov. consist of dissociated thoracic armor elements, but the specimen designed to be the holotype displays the median dorsal, anterior and posterior dorsolateral plates in connection. Though incomplete, the new species is characterized by an equilateral triangle-shaped median dorsal plate, a protruding posterodorsal apron of the posterior dorsolateral plate behind the overlap area for the median dorsal plate, and an overall lack of ornamentation. Groenlandaspis potyi sp. nov. constitutes the second occurrence of a Groenlandaspis species in continental Europe after the description of Groenlandaspis thorezi from upper Famennian quarries of Belgium. Another probable new species of Groenlandaspis is also described, though of unknown locality and horizon; it can however be deduced from the upper Famennian of Belgium without more precision. Together with some unpublished material of groenlandaspidids from the Famennian tetrapod-bearing locality of Strud, this material highlights the richness of the Groenlandaspididae diversity in Belgium. The discovery of Groenlandaspis potyi sp. nov. in Belgium reinforces the Famennian global distribution of this widespread genus during this period. Also, since those organisms have possibly been considered as non;marine indicators, this material is another argument pleading for close relationships between Euramerica and Gondwana around the Frasnian-Famennian boundary.
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