Understanding Ecosystems and Ecological Relationships

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Ecology is the branch of biology that deals with the study of interactions among organisms and between organisms and their environment.

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An ecosystem is a functional and self-sustaining unit of nature in which living organisms interact with the non-living components of the environment.

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Producers, consumers, and decomposers are the biotic components of an ecosystem.

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Sunlight, air, water, soil, and minerals are abiotic components of an ecosystem.

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Soil is non-living, so it is part of the abiotic components of an ecosystem. It supports plant roots and provides water and minerals, but it is not a living component itself.

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Sunlight is the primary source of energy on Earth. Green plants use it for photosynthesis, which begins the flow of energy through the ecosystem.

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Producers make organic food from inorganic substances. They form the first trophic level and supply energy to all other organisms in food chains.

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Consumers cannot make their own food, so they depend directly or indirectly on producers for energy and nutrition.