Piotr Wojtal

Late Middle Palaeolithic occupations in Ciemna Cave, southern Poland

Recent excavations in Ciemna Cave in the Prądnik valley near Ojców, southern Poland have brought to light new stratigraphic and techno-typological evidence concerning Late Middle Palaeolithic groups and their cultural affinities. In 2007, excavations began in the hitherto-unexplored main chamber of Ciemna Cave, with the goal of clarifying the results of previous work in other parts of the cave. During excavation the rocky floor of the cave was reached. About 1000 stone artifacts have been collected to date. Three cultural traditions have been documented: Mousterian, Taubachian, and Micoquian. Within the Micoquian tradition, three cultural levels were observed, which enriches the previous understanding of occupational phases at the site. These findings permit revision of the traditional terms “Prądnik industry” and “Prądnik technique.”

Central European Woolly Mammoth Population Dynamics: Insights from Late Pleistocene Mitochondrial Genomes

The population dynamics of the Pleistocene woolly mammoth (Mammuthus primigenius) has been the subject of intensive palaeogenetic research. Although a large number of mitochondrial genomes across Eurasia have been reconstructed, the available data remains geographically sparse and mostly focused on eastern Eurasia. Thus, population dynamics in other regions have not been extensively investigated. Here, we use a multi-method approach utilising proteomic, stable isotope and genetic techniques to identify and generate twenty woolly mammoth mitochondrial genomes, and associated dietary stable isotopic data, from highly fragmentary Late Pleistocene material from central Europe. We begin to address region-specific questions regarding central European woolly mammoth populations, highlighting parallels with a previous replacement event in eastern Eurasia ten thousand years earlier. A high number of shared derived mutations between woolly mammoth mitochondrial clades are identified, questioning previous phylogenetic analysis and thus emphasizing the need for nuclear DNA studies to explicate the increasingly complex genetic history of the woolly mammoth.

DIAGENETIC HISTORY OF WOOLLY MAMMOTH (MAMMUTHUS PRIMIGENIUS) SKELETAL REMAINS FROM THE ARCHAEOLOGICAL SITE CRACOW SPADZISTA STREET (B), SOUTHERN POLAND

ABSTRACT Skeletal remains of woolly mammoths have been studied using polarizing microscopy, SEM, XRD, and FTIR to characterize their diagenetic history. Formation of different secondary minerals in the bones is related to changing conditions of chemical diagenesis, both in the sediment and in the bone itself. Bone voids are commonly infilled with calcite and/or carbonate sediment, and dentinal tubules are coated or infilled with secondary apatite. The latter may have formed during the life of the organism. Some osteocyte lacunae were observed to be coated with Fe-Mn (hydroxy)oxides. The average hydroxylapatite Ca/P ratios are higher (1.78–2.10) than in stoichiometric hydroxylapatite. Hydroxylapatite crystallinity indices are generally low at 0.06–0.12, as expected for the young bones. Some of the bones are partly altered by microbial attack. Different postdepositional events affecting the bones (recrystallization of apatite, bacterial alterations, mineral and sediment infillings and cracking) were distinguished and their succession proposed.

Impact of climatic changes in the Late Pleistocene on migrations and extinction of mammals in Europe: four case studies

Climate changes that occurred during the Late Pleistocene have profound effects on the distribution of many plant and animal species and influenced the formation of contemporary faunas and floras of Europe. The course and mechanisms of responses of species to the past climate changes are now being intensively studied by the use of direct radiocarbon dating and genetic analyses of fossil remains. Here, we review the advances in understanding these processes by the example of four mammal species: woolly mammoth (Mammuthus primigenius), cave bear (Ursus spelaeus s. l.), saiga antelope (Saiga tatarica) and collared lemmings (Dicrostonyx ssp.). The cases discussed here as well as others show that the migrations, range shifts and local extinctions were the main responses to climate changes and that the dynamics of these climate driven processes were much more profound than it was previously thought. Each species reacted by its individual manner, which depended on its biology and adaptation abilities to the changing environment and climate conditions. The most severe changes in European ecosystems that affected the largest number of species took place around 33–31 ka BP, during the Last Glacial Maximum 22–19 ka BP and the Late Glacial warming 15–13 ka BP.