BIO 200LLB Lecture Notes - Lecture 19: Amphiprioninae, Butterflyfish, Rhizobia
12 Oct 2018
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Document Summary
Two entities interact but have no effect on each other. A relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter. A relationship between organisms of different species in which one organism is inhibited or destroyed while the other organism remains unaffected. 2 organisms interact where both derive a fitness benefit (increased reproductive output) Nitrogen-fixing in legumes (peas, beans peanuts, alfalfa) Bacteria get carbohydrates from a plant and plants get nitrogen. Services are exchanged for resources (usually nutrients. Nectar or pollen are traded for pollen dispersal. Squirrels get nuts and nuts are dispersed. Sea anemones protect anemone fish against predators and anemone fish protect anemone against butterflyfish. The partners aren"t necessarily dependent on each other. Ants protect aphids from ladybug, bettles and receive sugar water (sap) in return. One organism cannot survive without the other.
