BIOL 370 Study Guide - Quiz Guide: Keystone Species, Northern Flicker, Jack Pine
2 Apr 2019
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Document Summary
Rare species typically have less genetic diversity. Heterozygous individuals have greater fitness: 2 different alleles 1) gives greater flexibility in dealing with life"s challenges, 2) harmful alleles masked by functioning allele from other parent. Large populations and gene flow among populations help to maintain genetic diversity. Cheetah population bottleneck homogeneity & low genetic diversity of current cheetahs: ecosystem (biological communities + chemical & physical environment) Diversity across a landscape, including biological communities and physical features, natural or human-generated. Successional stages are a form of ecosystem diversity. Ecological succession is one form of ecosystem diversity = change in communities. & physical environment over time, after a disturbance event. Endangered kirkland"s warblers require young jack pine forest, but cavity- nesting birds require mid-late successional forest stages = potential management conflict. Human management: fire suppression, forest management, can alter successional dynamics. Keystone species and guilds are a priority for ecosystem/community conservation.
