Ecology Vocabulary ECOLOGY Levels of Organization Organism The study of living things and how they interact with their environment. Biosphere Ecosystem Community Population Organism One member of a species Population Group of organisms that belong to the same species in an area Community Group of different populations in an area Ecosystem Living and non-living things that interact in an area Biosphere Part of Earth that has life (above, on, below surface) Habitat Where an organism lives and gets its needs (example: food, air, shelter, etc.) Biome Group of ecosystems with same climate, same dominate plants/animals Large geographical area that has a distinct climate and certain species of plants and animals. Identified by the dominant plant life. There are terrestrial (land) and aquatic (water) ecosystems.