However, further simulation studies demonstrated that substantial extinction can occur without erasing the signal of an underlying decreasing diversification rate provided the initial speciation rate is high enough [ 74].
They speculated that this mismatch is explained by the disproportionate focus of conservation action on Critically Endangered species, and indeed there is good evidence that conservation efforts have prevented the extinction of a substantial number of Critically Endangered species107,108.
Previously proposed genetic load and meiotic suppression drives spread without limit and may incur a substantial risk of extinction.
These centres of diversity coincide alarmingly with Africa's biodiversity Hotspots, where a highly endemic biota is under substantial threat of extinction [ 9].
There is also no empirical support for a substantial amount of extinction (i.e. birth-death model) or temporal change (rate variable model) during the diversification of CA Heroine cichlids.
Local extinction of species can occur with a substantial delay following habitat loss or degradation.
Also, many studies have focused on the extinction of dinosaurs alone, and have forgotten about the more substantial marine ecosystem collapse.
