Sentence examples for average extinction rate from inspiring English sources

First, they calculated the rate at which mammals, which are well represented in the fossil record, died off in the past 65 million years, finding an average extinction rate of less than two species per million years.

They found an average of extinction rate of less than five species per million years.

This predicted an average subpopulation extinction rate of 3.3 out of 9 per generation but did not lead to any qualitatively different predictions at the subpopulation or metapopulation level from those shown in figures 3 6.

To further test whether biodiversity decline was due to reduced speciation rate rather than elevated extinction rate, average Middle Devonian and average Late Devonian rates were statistically compared.

Because in a population there will always be deaths (extinctions at the species level), the birth rate (speciation rate) must keep up with the death rate (extinction rate) on average through time or else the population (clade) will die out (become extinct).

We used models assuming constant per lineage rates of speciation and extinction to estimate average net diversification rates (speciation rate minus extinction rate) for the LT flock and constituent clades (Table S2) [32].

The corresponding extinction rate is 55 extinctions per million species per year.

Any absolute estimate of extinction rate, such as extinctions per year, requires knowledge of how many species there are.

In species selection, whole species proliferate if they have attributes that lower the extinction rate.

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

The exponential extinction rate is given precisely in Section 4.