BIOL 102 Lecture 26: Chapter 54
20 Nov 2016
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Document Summary
Community interactions are classified by whether they help, harm, or have no efect on species involved. Interspecific interactions= relationships between species in a community: ex. Competition, predation, herbivory, symbiosis, and facilitation: can affect the survival and reproduction of each species and effects can be summarized as positive, negative, or no effect. Interspecific competition= (-/- interaction) occurs where species compete for a resource in short supply. Predation= (+/- interaction) refers to an interaction in which one species, the predator, kills and eats the other, the prey. Some feeding adaptations of predators are claws, teeth, fangs, stingers, and poison. Herbivory= (+/- interaction) refers to an interaction in which an herbivore eats parts of a plant or alga. Has led to evolution of plant mechanical and chemical defenses and adaptations by herbivores. Symbiosis= a relationship where 2+ species live in direct and intimate contact w one another.
