1. Sunlight: The sun is the ultimate source of energy for most marine ecosystems.
2. Phytoplankton: These microscopic algae are the primary producers in the ocean. They use sunlight through photosynthesis to create their own food (energy).
3. Zooplankton: Small animals that feed on phytoplankton. They are primary consumers.
4. Small Fish: Fish that eat zooplankton. They are secondary consumers.
5. Larger Fish: Larger fish that eat smaller fish. They are tertiary consumers.
6. Top Predators: The highest level of consumers in the food web, such as sharks, whales, or tuna. They may eat smaller fish, seals, or other top predators.
Key points to remember:
* Energy is lost at each level: About 10% of the energy from one trophic level is passed on to the next. The rest is used for metabolism or lost as heat.
* Decomposers: Bacteria and fungi play a crucial role in breaking down dead organisms and waste, returning nutrients to the ecosystem.
* Food Webs are complex: Real-world food webs are more intricate than this simple sequence. Many organisms occupy multiple trophic levels, and there are many interconnected food chains.
