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Rise and Fall of the Beringian Steppe Bison
A detailed genetic history of bison throughout the late Pleistocene and Holocene epochs is reconstructed using ancient DNA and Bayesian techniques to reconstruct a large diverse population living throughout Beringia until around 37,000 years before the present, when the population's genetic diversity began to decline dramatically.
Spatial Response of Mammals to Late Quaternary Environmental Fluctuations
Analyses of fossil mammal faunas from 2945 localities in the United States demonstrate that the geographic ranges of individual species shifted at different times, in different directions, and at
Species-specific responses of Late Quaternary megafauna to climate and humans
It is shown that climate has been a major driver of population change over the past 50,000 years, however, each species responds differently to the effects of climatic shifts, habitat redistribution and human encroachment.
Fossil History of the Terrestrial Carnivora
Carnivores, because of their position on the ecological pyramid, are considerably rarer than their prey. They are also often intelligent and solitary animals, so that their chances of dying in a
Bone microstructure of the divingHesperornisand the voltantIchthyornisfrom the Niobrara Chalk of western Kansas
Abstract We report on the bone microstructure of the Cretaceous birdsHesperornis regalisandIchthyornis victor. Thin sections of representative elements of both these ornithurine birds show a rapid,
Phylogeography of lions (Panthera leo ssp.) reveals three distinct taxa and a late Pleistocene reduction in genetic diversity
Potential evidence of a severe population bottleneck in the cave lion during the previous interstadial is found, adding to evidence from bison, mammoths, horses and brown bears that megafaunal populations underwent major genetic alterations throughout the last interstadials, potentially presaging the processes involved in the subsequent end‐Pleistocene mass extinctions.
Model tests of gliding with different hindwing configurations in the four-winged dromaeosaurid Microraptor gui
This model with laterally abducted hindwings represents a biologically and aerodynamically reasonable configuration for this four-winged gliding animal, M. gui’s feathered hindwings, which would have seriously hampered terrestrial locomotion.