Current threats to extinction 1. Extinction in Hawaii. Historical consequences of remnant status and extinctions. Numerous native species have been driven to extinction, some of which can be documented on the basis of collections over last hundred years. Demographic and genetic consequences.
Small populations persist for shorter periods than larger populations.
Linkage between speciation and extinction High speciation rates often associated with high extinction rates. Pattern consistent with Vrba's resource-use hypothesis, which readily become subdivided because of their specialization. Pattern of events after extinction 1. Deposits almost free of fossils. Species very rare or totally absent during this time.