Food+Webs+assignment

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Liberty University *

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103

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Biology

Date

Apr 3, 2024

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pdf

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Uploaded by DeanThunderLlama32

Name _________________________ Date___________________________ Food Webs assignment: How do organisms get the energy they need to live in their environment? In this activity, you will explore feeding relationships in an aquatic ecosystem and build your own food web. Part 1: Observations and Data You will use the table below and the images of each that are in the lesson to complete your data table and food web. Organism Type Energy Source Phytoplankton Producer Use sunlight to perform photosynthesis Garibaldi fish Omnivore Anemone, worms, and kelp Kelp Producer Use sunlight to perform photosynthesis Snail Herbivore Kelp Sea urchin Omnivore Kelp, plankton, and snails California Sea Otter Carnivore Abalone, sea urchins, snails, clams, and crabs Orca Carnivore Seal, sea otter, fish Anchovy Carnivore Zooplankton and recently hatched fish Zooplankton Herbivore Phytoplankton Western Gull Carnivore Small fish, snail, starfish Harbor seal Carnivore Fish, clam, squid, crustaceans Sea anemone Carnivore Phytoplankton, Zooplankton, shrimp, small fish Bacteria Decomposers Break down organic matter and release nutrients Complete the table below for your marine food web. (20 pts) Which organisms in the marine ecosystem are producers, consumers (herbivores, carnivores, omnivores), and decomposers? Trophic level Organisms Producers Primary Consumers Secondary Consumers Tertiary Consumers Decomposers

Part 2: Complete an aquatic food web using the organisms living in a kelp forest described above and pictured in the Food Web assignment . (50 pts) Part 3: Analysis and Conclusion 1. Explain how an organism can be in more than one trophic level in an ecosystem. Do any organisms in your food web appear in more than one trophic level? Identify any organisms. (5 pts) 2. Write out two food chains from the food web you created. (10 pts) 3. How can the introduction of a moray eel affect a kelp forest food web? (5 pts)

4. Invasive species are non-native species that invade an ecosystem and have no natural predators and negatively impact the native habitat. Asian kelp is an invasive species that is affecting the iconic giant kelp beds off California. How might the invasive species, Asian kelp, be affecting the native species in your food web? (10 pts)

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