Sentence examples for natural extinction from inspiring English sources

Hence, the background natural extinction rate is roughly one in a million per year.

Deforestation is also impacting the rate of natural extinction, which is approximately 1 species per year.

We are losing up to 50,000 species annually, a rate nearly 1000 times the natural background level of natural extinction.

The study, led by Stanford, Princeton and the University of California-Berkeley, stated the number of vertebrate species that have gone extinct in the last century normally take 800 to 10,000 years to disappear under natural extinction rates.

In 2004, the International Union for Conservation of Nature (IUCN) reported stating that currently birds, mammals, and amphibians extinction rates were at maximum 48 times greater than natural extinction rates possibly 1,024 times higher.

This experiment included 64 plots planted and maintained at 1, 2, 4, 8 and 32 species between 1995 and 2000, followed by two years when natural extinction and colonization was permitted.

We are bringing about species loss on the scale of some of the natural extinctions of palaeohistory.

The test evaluated participants' knowledge regarding the following concepts: natural selection, extinction processes, homologous structures, co-evolution, analogous structures, convergent evolution, intermediate forms, adaptive radiation, speciation, evolutionary rates, fossil record, biogeography, environmental change, genetic variability, and reproductive success.

The test included 21 items with one correct answer and four distracters and covered the content areas; natural selection, extinction processes, homologous structures, coevolution, analogous structures, convergent evolution, intermediate forms, adaptive radiation, speciation, evolutionary rates, fossil record, biogeography, environmental change, genetic variability, and reproductive success.

We examined phylogenetic patterns of natural colonization, extinction and biomass production in experimentally assembled communities.

Should human disturbance not be providing a window into natural background extinction dynamics within the tropics, we need to carefully examine what the disproportionate loss of tropical species will mean to conservation of phylogenetic diversity.