Extinction threatens more species than thought - Telegraph

"When we apply our new mathematical model to species extinction rates, it shows that things are worse than we thought," said Dr Melbourne.

"By accounting for random differences between individuals, extinction rates for endangered species can be orders of magnitude higher than conservation biologists have believed."

"Almost all previous studies don't include all of the factors we studied, so it is fair to say that most previous studies suffer from this inadequacy. One general message from our work is that population sizes might need to be much larger for species to be relatively safe from extinction."

Extinction threatens more species than thought - Telegraph