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Transcript
Levels of Organization in the Ecosystem 7.EC.5A.1 Develop and use models to describe the characteristics of the levels of organization within ecosystems (including species, populations, communities, ecosystems, and biomes). Levels of Organization in the Ecosystem SIMPLEST Each level is defined by the type and number of biotic (organisms) and/or the abiotic (nonliving) factors present. COMPLEX Species • The individual living organism • Organisms of the same species can reproduce to make more of that species › Example – white tail deer Populations • All of the individuals of a given species in a specific area or region at a certain time. • Members of a population compete for food, water, space, and mates. › Example – all of the white tail deer in South Carolina Communities • All the different populations in a specific area or region at a certain time. • Communities involve many types of interactions among the populations. • Some of these interactions involve the obtaining and use of food, space, or other environmental resources. › Example – all of the living organisms (biotic factors) in the environment with the white tail deer, including pine trees, grass, squirrels, moss, mushrooms, and Carolina wrens. Ecosystems • One or more communities in an area and the abiotic factors, including water, sunlight, oxygen, temperature, and soil is an ecosystem. › Example – all of the living organisms (biotic factors) in the environment with the white tail deer, including pine trees, grass, squirrels, moss, mushrooms, and Carolina wrens as well as all of the abiotic (non-living) factors such as rivers, soil, air, and rocks Biomes • Individual ecosystems grouped together according to the climate, the predominant vegetation, and characterized by adaptations of organisms to that particular environment. › Example – the temperate (mild temps) deciduous (trees shed leaves annually) forest that the white tail deer lives in. • The place where an organism lives in order to obtain its food, water, shelter and other things needed for survival is called its habitat. • The particular role of an organism in its environment including type of food it eats, how it obtains its food and how it interacts with other organisms is called its niche. For example, the niche of a bee is to pollinate flowers as it gathers nectar for its food.