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Extinctions in northern Eurasia were staggered over tens of thousands of years between 50,000 and 10,000 years ago, [2] while extinctions in the Americas were virtually simultaneous, spanning only 3000 years at most. [4][8] Overall, during the Late Pleistocene about 65% of all megafaunal species worldwide became extinct, [9] rising to 72% in ...
The reason that a number of groups went extinct in North America but lived on in South America (while no examples of the opposite pattern are known) appears to be that the dense rainforest of the Amazon basin and the high peaks of the Andes provided environments that afforded a degree of protection from human predation. [168] [n 25] [n 26]
Local extinction, also extirpation, is the termination of a species (or other taxon) in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinctions. [1][2] Local extinctions mark a change in the ecology of an area. It has sometimes been followed by a replacement of the species ...
Bird extinction is the complete elimination of all species members under the taxonomic class, Aves. Out of all known bird species, (approximately 11,154), 159 (1.4%) have become extinct, with 226 (2%) being critically endangered. [1] There is a general consensus among ornithologists that if anthropogenic activities continue as current trends ...
The Cretaceous–Paleogene (K–Pg) extinction event, [ a ] also known as the Cretaceous–Tertiary(K–T)extinction, [ b ] was the mass extinction of three-quarters of the plant and animal species on Earth [ 2 ][ 3 ] approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.
Tennessee, Cumberland, Ohio, and Wabash River systems [190] Extinct in 1936 due to loss of habitat through impoundment or channelization. [8] Sampson's pearly mussel. Epioblasma sampsonii. Kentucky, Illinois, and Indiana [191] Extinct in the 1930s or 1940s due to habitat destruction and fragmentation.
The Triassic–Jurassic (Tr-J) extinction event (TJME), often called the end-Triassic extinction, was a Mesozoic extinction event that marks the boundary between the Triassic and Jurassic periods, 201.4 million years ago, [a] and is one of the top five major extinction events of the Phanerozoic eon, [2] profoundly affecting life on land and in ...
Ecological extinction stands out because it is the interaction ecology of a species that is important for conservation work. They state that "unless the species interacts significantly with other species in the community (e.g. it is an important predator, competitor, symbiont, mutualist, or prey) its loss may result in little to no adjustment ...