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This Concept Map, created with IHMC CmapTools, has information related to: Puja Patel Deval Tolia, regulates relative abundance of species in communities that hold regardless of the ecosystem shown by Presrton:lognormal distributions of frequency distribution a bell shaped curve, Community includes species abundance, food webs: A summary of feeding interactions within a community ordered as primary producers--> primary consumer--> secondary consumer--> tertiarry consumers, intermediate hypothesis theory defined as areas of moderate disturbance will likely support a greater species diviersity, number of individauls per species which regulates relative abundance of species in communities that hold regardless of the ecosystem, species abundance defined as number of individauls per species, CH.17: Interactions and Communtiy Structure includes Indirect interactions, a greater species eveness has a greater species diversity measured using the shannon weiner diversity index, food webs: A summary of feeding interactions within a community includes keystone species, Species Diversity based on species richness, CH.16: Species Abundance and Diversity Includes Community, association of interacting species inhabiting some defined area including Communtiy Structure, species with relatively low biomass that have a great impact on community structure by reducing competitive exclusion and allowing species to coexist for example steelhead and california roach are keystone species, Indirect interactions seen in food webs: A summary of feeding interactions within a community, species evenvess defined as relative abundance of species, number of species and a greater species eveness has a greater species diversity, species with relatively low biomass that have a great impact on community structure by reducing competitive exclusion and allowing species to coexist for example Paine condcuted a stiudy in which starfish (the top predator) was removed form the food web, Paine condcuted a stiudy in which starfish (the top predator) was removed form the food web resulted in a decrease in speices diversity from 15 to 8, recognizing the starfish as a keystone species, Species Diversity includes intermediate hypothesis theory, steelhead and california roach are keystone species in which enclosing fish resulted in a decrease in predatory insects, leading to an increase in herbivorous chironomids, which increases feeding pressure on algal population