Harper and several other researchers have attempted to prove the former existence of a king vulture relative in Florida at this late date, suggesting that the population was in the process of extinction and finally disappeared during a cold spell.
Making discreet mention of the unfolding Holocaust, the New York Times reviewer called the book "a distinguished piece of writing [and] to all intents and purposes, a memorial to that world, for generations injured and humiliated and now in the process of extinction".
However, increasingly complete datasets of this kind are now available to make the comparisons needed in order to extract the process of extinction from the pattern.
The process of extinction of these lineages can be described in terms of the fraction of the lineages that survive past the given time interval from the breakpoint.
These results showed that l-NAME produced a task-dependent impairment of fear extinction, and implied that nitric oxide signaling was involved in memory process of certain extinction tasks.
For both species, there is evidence of long-distance dispersal (LDD) [ 18, 20], reinforcing the key role of dispersal as an important biogeographic mechanism in the process of population extinction and posterior recolonization [ 18].
Some scientists fear that the situation is already so serious and so many self-reinforcing feedback loops are already in play that we are in the process of causing our own extinction.
The Nile perch, a species introduced into Victoria's waters in the 1960's, has destroyed nearly every other form of life in the lake, and is apparently in the process of devouring itself into extinction.
λ - μ s - 2 exp λ - μ ∑ i = 3 s x i × 1 - μ λ s ∏ i = 2 s exp λ - μ x i - μ λ - 2 The function reduces to a pure-birth process (PB) in the absence of extinction (μ = 0).
