Energy Flow in an Ecosystem

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A food chain is a definite sequence of interactions between producers, consumers, and decomposers in an ecosystem. It shows the linear flow of energy and nutrients from one organism to another, typica…

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A food web is an intricate network of interconnected food chains in an ecosystem. While a food chain shows a linear sequence, a food web shows that one organism can be prey for many other organisms, f…

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A trophic level is each step in the food chain where an organism obtains its food. Examples: 1st level - Producers (green plants), 2nd level - Primary consumers (grasshopper, deer), 3rd level - Second…

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Primary consumers are herbivores that feed directly on autotrophs (producers). They occupy the second trophic level. Examples: Grasshopper, squirrel, elephant, deer, rabbit. They are directly dependen…

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Secondary consumers are carnivores that feed on herbivores (e.g., frog, owl, fox). Apex consumers are top carnivores that feed on both herbivores and other carnivores, with no natural predators (e.g.,…

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The pyramid of energy shows energy transfer at each trophic level, with maximum energy at the producer level decreasing towards apex consumers. It has a pyramid shape because energy is lost as heat at…

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Energy flow is 'one way' because the sun provides energy to producers, which passes through consumers and is finally dissipated by decomposers as heat. This energy never returns to the sun. Energy can…

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A biogeochemical cycle is the cyclical flow of nutrients within an ecosystem. Nutrients necessary for organism growth are continuously transferred from abiotic to biotic factors and back, operating th…