54 1 Species Interaction Community group of different species living in the same area Ways to measure a community DIVERSITY Diversity incorporates Species Richness the number of different species in the community Abundance this is the relative abundance of species or how many individuals of a certain species are in the community if there was a community with 4 different species that were all equally represented it would be more diverse than a community with 4 different species where one species was more abundant than the rest 4 TYPES OF SPECIES INTERACTIONS Competition two species using the same resources Neither species benefits from interaction they both are negatively affected Can cause species to change how they use the resources to lessen the competition shifting use of environment to avoid competition Species can eventually evolve in order to avoid competition Predation Carnivores prey on other animals herbivores prey on plants Ex mosquitos drink blood so they prey on humans parasites prey on host Mutualism Where both species benefit from the interaction Commensalism Where one species benefits from interaction and the other isn t effected by it
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