Our study provides continental‐scale evidence of plant species extinction risk caused by future climate and land‐use change, and highlights the importance of integrating phylogenetic measures into conservation … More than 700 North American bee species are head toward extinction as habitat loss and pesticide use continue at a breakneck pace. This is an incomplete list of extinct animals of North America. This suggests a disproportionate future loss of phylogenetic diversity for the North American flora. Many … The late Pleistocene witnessed the extinction of 35 genera of North American mammals. Extinct giants, such as the American cheetah and ground sloth, lived in North America until they mysteriously died out about 10,000 years ago. Research from Curtin University has found that pre-historic climate change does not explain the extinction of megafauna in North America at the end of the last Ice Age. Some recent … Horses, camels and rhinos originatedin North America 30 to 50 million years ago. By Michael Balter Jan. 28, 2014, 5:45 PM Until about 11,000 years ago, mammoths, giant beavers, and other massive mammals roamed North America. The oldestknown primatefossils in North America are 55 million years old. Some weighed upwards of 2 tons, providing prehistorichumans with a source of food. Synthesis and applications . 9 survival of mammoth and horse in interior Alaska. Extinction of North American Cuvieronius (Mammalia: Proboscidea: Gomphotheriidae) driven by dietary resource competition with sympatric mammoths and mastodons - Volume 46 Issue 1 - Gregory James Smith, Larisa R. G. DeSantis Previous to the North American megafauna extinction giant mammals existed for millions of years. This list of North American extinctions is not intended to be comprehensive. North American Megafauna Extinction: Climate or Overhunting? This list covers only … ), although whether the absence of fossil occurrences for the remaining 19 genera from this time interval is the result of sampling error or temporally staggered … The last appearance dates of 16 of these genera securely fall between 12,000 and 10,000 radiocarbon years ago (≈13,800–11,400 calendar years B.P.