Table 2 in Scientists' warning - The outstanding biodiversity of islands is in peril

Table 2 Factors contributing to the natural vulnerability of insular biota (based in Frankham et al., 2002).
Insular conditionConsequence on their vulnerabilityVery small distribution range (endemics are usually Single Island Endemics - SIEs)Higher extinction risk due to stochastic events (volcanism, landslides, etc.)Lower population size (unless density compensation)Naturally fragmented distribution rangeHigh genetic differentiation at a population level, meaning that extirpations imply genetic heritage loss (populations, and not species, as operational conservation units)Low population sizes (N)Low effective population size (Ne)Risk of stochastic demographic collapseFew populations/ Few individuals per populationGenetic drift controls speciation, implying a non-adaptive path that creates species not fitting in their environment, promoting inbreeding depression and finally population collapsePopulation origin through founder eventPopulation bottleneck resulting in lower and singular genetic diversity