Components of an Ecosystem Notes •describe biotic and abiotic parts of an ecosystem in which organisms interact •diagram the levels of organization within an ecosystem including organism, population, community, and ecosystem An ecosystem is a group of living and non-living things that interact with each other. All of the living things, in an ecosystem are called biotic factors. Examples: plants, animals, fungi, bacteria, etc… All of the nonliving things are called abiotic factors. Examples: sunlight, soil, rocks, water, temperature, clouds, gases etc… Ecosystems can be large (prairie) or small (puddle). The Texas prairie Scientists examine levels of the ecosystem to help them understand it as a whole. The basic levels of organization are Organism population community ecosystem Levels of Organization in an Ecosystem Organism Population Community Ecosystem Organism: A living thing. Population: All of the organisms of the same type (species) that live in an area at the same time. Community: All of the organisms that live together in an area. Ecosystem: All of the organisms living in the same area and their nonliving environment.