Effects On Life
The causes of the bottleneck phenomenon—i.e., a sharp decrease in a species' population, immediately followed by a period of great genetic divergence (differentiation) among survivors—is attributed to volcanic winters by some researchers. According to anthropologist Stanley Ambrose, such events diminish populations to "levels low enough for evolutionary changes, which occur much faster in small populations, to produce rapid population differentiation". With the Toba bottleneck, many species show massive effects of narrowing of the gene pool, and it is believed Toba nearly exterminated humankind.
Read more about this topic: Volcanic Winter
Famous quotes containing the words effects and/or life:
“Like the effects of industrial pollution ... the AIDS crisis is evidence of a world in which nothing important is regional, local, limited; in which everything that can circulate does, and every problem is, or is destined to become, worldwide.”
—Susan Sontag (b. 1933)
“In everyone there sleeps
A sense of life lived according to love.
To some it means the difference they could make
By loving others, but across most it sweeps
As all they might have done had they been loved.
That nothing cures.”
—Philip Larkin (1922–1986)