.1 1 Factors that influence genetic diversity (genetic variability) Hybridization, evolution, genetic drift, selective breeding, mutations, small population (inbreeding) tructural diversity: range of physical shapes and sizes within a habitat or ecosystem. S Creates microhabitats, allows different plants and animals to flourish orest fires good for environment F Promote biodiversity (reduces buildup of organic debris, releases nutrients, healthy changes in vegetation) Forest fires bad for environment Positive feedback loop Infestation of pests 1.2