BIO 200 Lecture Notes - Lecture 17: Paramecium, Character Displacement, Cleaner Fish
2 Nov 2017
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Most of these interactions influence the evolution of a species. Barnacles are too small and insignificant to affect the whale. Produced because of microorganism in water produce toxic waste products. They got a population explosion and the toxic waste kills the organisms in the water. The dinoflagellates gets nothing from this and causes a negative effect. Mutualism: 2 organisms interact where both derive a fitness benefit (increased reproductive output) Types of mutualistic relationships: resource-resource relationship = resources are exchanged (usually nutrients) tropic e. g. mycorrhizae: plant roots and fungi: the plant roots give carbohydrates to fungi and the fungi gives soil minerals to plant. [80-90% of plants in the world] nitrogen-fixing in legumes (peas, beans, peanuts, alfalfa):root nodule with rhizobia. Facultative: the partners aren"t necessarily completely dependent on each other e. g. boran people of africa, and the honey guide. Greater honey guide leads people to bee colonies.
