Mass extinctions are characterized by the loss of at least 75% of species within a geologically short period of time (i.e., less than 2 million years). [18] [51] The Holocene extinction is also known as the "sixth extinction", as it is possibly the sixth mass extinction event, after the Ordovician–Silurian extinction events, the Late Devonian extinction, the Permian–Triassic …

What’s causing the sixth mass extinction? Unlike previous extinction events caused by natural phenomena, the sixth mass extinction is driven by human activity, primarily (though not limited to) the unsustainable use of land, water and energy use, and climate change.Currently, 40% of all land has been converted for food production. Agriculture is also responsible for 90% of global ...

2023年12月24日 · A growing number of scientists believe a sixth mass extinction event of a magnitude equal to the prior five has been unfolding for the past 10,000 years as humans have made their mark around the ...

Accelerated modern human–induced species losses: Entering the sixth mass extinction. Science Advances 1: e1400253. Ceballos, G., Ehrlich, P. R., and P. H. Raven (2020). Vertebrates on the brink as indicators of biological annihilation and the sixth mass extinction. Proceedings of the National Academy of Sciences 117: 13596–13602.

2022年1月13日 · The history of life on Earth has been marked five times by events of mass biodiversity extinction caused by extreme natural phenomena. Today, many experts warn that a Sixth Mass Extinction crisis ...

2023年5月2日 · Scientists agree that the Earth is currently undergoing the sixth mass extinction in its 4.6-billion-year history. A new study says that there may be a time lag between when humans implement ...

2015年6月19日 · The loss of biodiversity is one of the most critical current environmental problems, threatening valuable ecosystem services and human well-being (1–7).A growing body of evidence indicates that current species extinction rates are higher than the pre-human background rate (8–15), with hundreds of anthropogenic vertebrate extinctions documented in …

2023年9月18日 · The passenger pigeon. The Tasmanian tiger. The Baiji, or Yangtze river dolphin. These rank among the best-known recent victims of what many scientists have declared the sixth mass extinction, as ...

2021年5月19日 · Katie says, 'The current rate of extinction is between 100 and 1,000 times higher than the pre-human background rate of extinction, which is jaw-dropping. We are definitely going through a sixth mass extinction.' Never before has a single species been responsible for such destruction on Earth.

2024年4月13日 · "Obviously that can't go on too much longer without making the sixth mass extinction an actuality." A 2022 WWF report found that monitored vertebrate populations of mammals, birds, amphibians ...