Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
Powiadomienia systemowe
  • Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
EN
Climate changes that occurred during the Late Pleistocene had 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 past climate changes are now being intensely 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 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 was previously thought. Each species reacted in its individual manner, which depended on its biology and adaptation abilities to changing environmental and climatic 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.
EN
Interdisciplinary excavation undertaken in the Deszczowa Cave and the Upper Rock Shelter between 1989 and 1997 have yielded Palaeolithic artefacts and abundant vertebrate fauna. Sediment sequence consists of 11 layers marked from the bottom to the top I-XI. Layer IV probably represents the warmest period due to important amount of organic carbon, phosphates and iron compounds. Generally, the lower part of the section (layers I-VI) could be correlated with the Early Vistulian and/or Interplenivistulian. Loess layer VIII originated during cold and dry period and it probably corresponds to the Upper Pleniglacial. The fossil fauna of snails and vertebrates belong to ca. 130 species. In the almost whole profile (except of layers X and XI), the most abundant are steppe-tundra species (65-76%) accompanied by forest faunas (especialy in layers VI and XI, 22% and 29%, respectively), and species connected with water or moist environments (10-23%). Three Middle Palaeolithic cultural horizons have been distinguished in layers IV-VI, Aurignacian assemblage in layer VIIa, Epigravettian one in layer VIIIa, and Late Palaeolithic or Early Mesolithic at the surface of the layer X.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.