BIO-8 Lecture Notes - Lecture 6: Obligate Parasite, Shiny Cowbird, Florida Today
Document Summary
Dispersal: transport of organisms, typically between place of birth and place of reproduction. Geographic distribution is approximately small parts of n. Eastern north america suitable place for gypsy moths. Initial dispersal limitation: north atlantic serves as barrier to dispersal (limited dispersal ability) Occurs in very cool waters with thick fur. Pelt of these organisms used for fur making. Early 1900s thought to be extinct; around 1910 they found a colony of seat otters. Hasn"t had time to get there yet (limited time for dispersal); proximate cause. Humans served as biotic factors (predators) ; ultimate/historical cause. Females lay their eggs in other birds nests and other birds will raise these birds as its own young (obligate brood parasitism); never make their own nest. Originally just in trinidad and tribago, eventually moved to. Antillean islands, then hispaniola, and cuba were colonized (less than 100 years); remarkable colonization. Lesser antilles had no grassland, volcanic islands.
