FOR201H1 Lecture Notes - Lecture 5: Clidemia Hirta, Ecological Succession, Seed Dormancy
Document Summary
Convergent evolution of tropical pioneers neotropics: variety of species of cecropia. Africa: musanga cecropiodes (looks like cecropia but it is restricted to africa) Se asia: macaranga spp. (not as many lobes but similar giant leaves) if they"re dominant- probably secondary forest. Survivorship number surviving vs time most pioneer species disperse seeds that won"t survive late-successional species have higher survivorship log scale- linear relationship. Seeds- the basic tradeo pioneer: many + small late-successional: few + big seeds- pioneers clidemia hirta (melastomataceae) same family as miconia invasive species produces a lot of seeds most invasive species are pioneer. Seeds- late-successional spp. brazil-nut slow growing trees shade tolerant. Many parrots are pre-dispersal seed predators agouti (important seed predator of brazil nuts- but also caches) trees rely on these animals to not have good memory to disperse. Seed germination types most tropical species are late-successional tree species recalcitrant: late-successional.
