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Background extinction rate, also known as the normal extinction rate, refers to the standard rate of extinction in Earth's geological and biological history, excluding major extinction events, including the current human-induced Holocene extinction. There have been five mass extinction events throughout Earth's history.
11 gru 2018 · Background extinction rate, or normal extinction rate, refers to the number of species that would be expected to go extinct over a period of time, based on non-anthropogenic (non-human) factors. The background extinction rate is often measured for a specific classification and over a particular period of time.
11 sty 2012 · Background extinction consists typically of two intergrading phases: habitat attenuation and habitat dissolution. These processes generate the relict populations that characterize many species undergoing background extinction.
The background extinction rate represents the natural, ongoing process of species loss that occurs over geological time scales. It is influenced by factors such as natural selection, environmental changes, competition, and predation.
3 paź 2024 · This then is the benchmark—the background rate against which one can compare modern rates. For example, given a sample of 10,000 living described species (roughly the number of modern bird species), one should see one extinction every 100 years.
9 gru 2011 · Background extinction is divided into two intergrading phases of a continuum: habitat attenuation is the process that precludes survival of progeny because of continued loss of suitable habitat/niche. Habitat dissolution is the final stage of background extinction.
Background extinctions are often driven by ecological factors such as habitat loss, climate change, and natural disasters, rather than human activity. Studying background extinction helps scientists understand patterns of biodiversity loss and recovery over geological time scales.
