Pleistocene Extinctions - Sam Noble Museum During the Pleistocene, large mammals like mammoths and saber-toothed cats roamed North America By 11,000 years ago they were extinct Large mammal extinctions occurred on other continents, including South America and Australia, during the Pleistocene When did it happen?The extinctions in North America began about 12,900 years ago, at the start of a time interval
The functional roles of mammals in ecosystems - Oxford Academic The extensive influence mammals have on ecosystems results in important services that contribute to human well-being, such as pollination, insect pest control, and bioturbation of soils The rapid declines in abundance of many mammal populations and the associated increase in extinction risk raise conservation concerns for mammals
Biodiversity - Education | National Geographic Society Biodiversity refers to the variety of living species on Earth, including plants, animals, bacteria and fungi While Earth’s biodiversity is so rich that many species have yet to be discovered, many species are being threatened with extinction due to human activities, putting the Earth’s magnificent biodiversity at risk
Invasive and Exotic Marine Species | NOAA Fisheries Invasive fish, plants, and other species are transported to new environments via vectors and pathways Vectors are biological methods of transferring species such as an organism carrying a disease and transferring it directly to another—examples include mosquitoes, ticks, and even humans carrying the flu virus
The platypus: evolutionary history, biology, and an uncertain . . . The platypus (Ornithorhynchus anatinus) is one of the world’s most evolutionarily distinct mammals, one of five extant species of egg-laying mammals, and the only living species within the family Ornithorhynchidae Modern platypuses are endemic to
Extinction of threatened vertebrates will lead to . . . - Nature These simulations mimicked a gradient of extinction risk from a scenario where only the most endangered species went extinct to a more dramatic scenario where all threatened species (including the