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The Holocene extinction , or Anthropocene extinction , [ 3 ] [ 4 ] is the ongoing extinction event caused by humans during the Holocene epoch. These extinctions span numerous families of plants [ 5 ] [ 6 ] [ 7 ] and animals, including mammals , birds, reptiles, amphibians , fish, and invertebrates , and affecting not just terrestrial species but also large sectors of marine life.
The current rate of extinction of species is estimated at to 1, times higher than natural background extinction rates [ 9 ] [ 10 ] [ 11 ] [ 12 ] [ 13 ] and is increasing. The Holocene extinction follows the extinction of the majority of large megafaunal animals during the preceding Late Pleistocene.
Some of these extinctions were likely in part due to human hunting pressure. Although there is debate regarding how much human predation and habitat loss affected their decline, certain population declines have been directly correlated with the onset of human activity, such as the extinction events of New Zealand , Madagascar, and Hawaii. Aside from humans, climate change may have been a driving factor in the megafaunal extinctions, especially at the end of the Pleistocene.
Over the course of the Late Holocene, there were hundreds of extinctions of birds on islands across the Pacific, driven by human settlement of the previously uninhabited islands, with extinctions peaking around AD. In the twentieth century, human numbers quadrupled, and the size of the global economy increased twenty-five-fold. Overall, the Holocene extinction can be linked to the human impact on the environment.