Happens to variation in endangered species where the number of individuals is very low?

When the number of individuals in an endangered species is very low, genetic variation tends to decrease, leading to inbreeding depression. This reduction in genetic diversity can result in decreased adaptability to environmental changes, increased susceptibility to diseases, and lower reproductive success. Consequently, these factors can further threaten the survival of the species, potentially leading to extinction. Conservation efforts often focus on maintaining or increasing genetic variation to bolster the resilience of these populations.