Sentences with phrase «viable population size»
But even at that extreme, there would be a viable population size.
http://www.realclimate.org/
Bradshaw and his colleagues recently surveyed studies of 212 vertebrates and found that the typical minimum viable population size required for a species to survive long - term is about 5,000 individuals.
Survival for such species will depend on whether or not viable population sizes will remain in areas where climate does not change unsuitably, and on the potential of surviving individuals to disperse from climatically unsuitable areas into regions with favorable climate.
Not exact matches
Yet in a second, eight - state survey of 36 ginseng populations, the maximum size was 406 individuals — that is, none were viable.
Eventually there will be no need for the chimeras and surrogate parents, once the captive population has reached a size that individuals can be removed for wild release without endangering the continuance of the flock we will have reached our goal of a viable captive population.
The Passenger Pigeon's genome may hold the answers to the true minimum population size necessary for a viable population.
The real question is what population size can maintain technology sufficient to provide good healthcare, that enables us to colonise other planets (if such a thing is really viable), mine the asteroids, and deflect a possible asteroid that is on a collision course.
The important question is: How many of additional species living lonely lives in their isolated patches (the 5 %) would become extinct eventually because their population sizes are too small to be viable?
Eventually there will be no need for the chimeras and surrogate parents, once the captive population has reached a size that individuals can be removed for wild release without endangering the continuance of the flock we will have reached our goal of a viable captive population.
The abrupt impact of climate change on causing extinctions of key concern, therefore, is its potential to deplete population sizes below viable thresholds within just the next few decades, whether or not the last individual of a species actually dies.