Eyewitness: Encyclopedia of Science

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Transcription: The part of the earth and its atmosphere that can support living organisms is called the biosphere. This consists of the air and land as well as lakes, rivers, and oceans. Organisms usually live alongside other members of the same species to form a population. Lots of different populations share the same habitat. Together they all form a community. The members of a community constantly react with one another and their environment creating a balanced living system system called an ecosystem, such as an ocean or a rainforest. The study of all these interactions is called ecology.