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ECOSYSTEMS Explore

ECOSYSTEMS Explore. Feeding Relationships And Energy and Matter in Ecosystems. TEK 8.11A. The student knows that interdependence occurs among living systems and the environment and that humans affect these systems. The student is expected to:

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ECOSYSTEMS Explore

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  1. ECOSYSTEMS Explore Feeding Relationships And Energy and Matter in Ecosystems

  2. TEK 8.11A • The student knows that interdependence occurs among living systems and the environment and that humans affect these systems. The student is expected to: • (A) Describe producer/consumer, predator/prey, and parasite/host relationships as they occur in food webs within marine, freshwater, and terrestrial ecosystems.

  3. What is a food web? • Click here to find out! • Interconnected food chains are shown as a food web.

  4. Producer vs. Consumer • What are some examples of producers in a marine environment? Freshwater? Terrestrial? • What are some examples of consumers in a marine environment? Freshwater? Terrestrial?

  5. Marine food web example

  6. Freshwater food web example

  7. Terrestrial food web example

  8. Energy pyramid • An energy pyramid is a model showing energy flow in a community. The different levels represent different groups of organisms. • The levels are called trophic levels.

  9. Energy pyramid • An energy pyramid’s shape shows how the amount of useful energy that enters each level decreases as it is used by the organisms in that level. • 90% of energy is lost at each step. (In other words, only 10% of the energy is passed up to the next level.) • Click here to see a music video about food chains and energy!

  10. Click here for a study jam! • Producers use energy from the sun to make their own food through photosynthesis • Primary consumers eat producers, so they are herbivores (plant eaters). • Secondary consumers eat the primary consumers, so they are carnivores (meat eaters). • Tertiary consumers eat the secondary consumers. • Omnivores eat both plants and animals. • Decomposers feed on the remains or wastes of other organisms (ex: fungi, bacteria). • Scavengers eat the remains of other organisms left behind by other animals (ex: crabs, hyenas, vultures).

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