BIO 1306 Lecture Notes - Lecture 19: Competitive Exclusion Principle, Ecological Niche, Character Displacement
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A biological ____________ is an assemblage of populations of various species living close enough for potential interaction. For example, the carrier crab carries a sea urchin on its back for protection against predators. Concept 54. 1: community interactions are classified by whether they help, harm, or have no effect on the species involved. Ecologists call relationships between species in a community ____________ interactions. Examples are competition, predation, herbivory, symbiosis (parasitism, mutualism, and commensalism), and facilitation. Interspecific interactions can affect the survival and reproduction of each species, and the effects can be summarized as positive (+), negative ( ), or no effect (0) ____________ competition ( / interaction) occurs when species compete for a resource in short supply. Strong competition can lead to __________exclusion, local elimination of a competing species. The competitive exclusion principle states that two species competing for the same limiting resources cannot coexist in the same place.
