Fig. 2: The extinction risk of a neutral community.(a) Extinction probability as a function of abundance across three time intervals (10, 20 and 100 years) for a neutral community ofJ = 5000. Coloured lines show the thresholds for critically endangered (CR), endangered (EN) and vulnerable (VU) populations.(b) The zero-sum ecological drift of J = 5000 individuals from S =40 species between 1970 and 2020, superimposed with coloured thresholds of extinction threat categories.(c) The percentage of each species per threat category between 1970 and 2020, and (d) the associated Red List Index(where values of 1 indicate all species are Least Concern, LC, and 0 indicates that all species are extinct, EX).