BIO 200LLB Lecture Notes - Lecture 17: Amphiprioninae, Borana Oromo People, Coccinellidae

• School: University at Buffalo
• Department: Biological Sciences
• Course: BIO 200LLB
• Professor: Herreid, C F

Document Summary

This is negative selection- elimination of unfit genotypes. Relations between species (influence the evolution of species) Species a b (+), species b species a (+) 2 organisms interact where both derive a fitness benefit (increased reproductive output) Nitrogen- fixing in legumes (peas, beans, peanuts, alfalfa) Bacteria get carbohydrates from plant and plants get nitrogen. Service -- resource relationship = services are exchanged for resources (usually nutrients) E. g pollination - nectar or pollen are traded for pollen dispersal. Seed dispersal-- squirrels get nuts and nuts are dispersed. Service -- service relationship= services are exchanged. Sea anemones protect against predators and anemonefish protect anemone against the butterfly fish. Facultative= the partners are not necessarily completely dependent on each other. E. g boran people of africa and the honey guide. E. g. protection from predators- ants protect aphids from lady bug beetles and receive sugar water (sap) in return. Species a b (-), species b species a (-) Scramble competition= same resource at different times.