BIO 220 Week 2 Assignment: Ecosystems and Trophic Levels

In this
assignment, you will be creating a trophic pyramid, also known as an
"ecological pyramid," for a specific ecosystem. Your completed
trophic pyramid will be used to identify the trophic levels within the food
web, as well as their effects on the ecosystem. To complete this assignment go
to to retrieve the trophic pyramid worksheet. When
completing the worksheet follow the guidelines below:


  1. Select an ecosystem from an
    area of interest to you. When choosing an ecosystem, be specific. For help
    differentiating between biomes and ecosystems, review "Biomes and


  1. Utilize credible sources to
    select and research your chosen ecosystem, including the textbook and the
    Internet (specifically, you may find the World Biomes page located
    at helpful).


  1. When researching your selected
    ecosystem, give special attention to the plant and animals species that
    inhabit that ecosystem. This information will be used to design the
    ecological pyramid.


  1. Refer to the "Trophic
    Pyramid." You will complete this template by entering the names of
    the species that belong to the various trophic levels (Apex predator,
    tertiary consumers, secondary consumers, primary consumers, and primary


  1. Refer to the text for further
    information and an explanation of trophic levels.


Using your
completed trophic pyramid, answer the following questions in a separate Word
document of at least 250-500 words:


  1. Of the primary producers you
    selected, which one do you think has the biggest impact on the ecosystem
    you researched? Explain.


  1. What species did you select for
    the apex predator? Explain the importance the apex predator's impact on
    the other species in your tropic pyramid.


  1. How did the amount of energy
    gained compare to the amount of energy lost as heat at the 2nd–4th trophic


  1. Referring to your completed
    trophic pyramid template, select one species. If this species was removed
    from your trophic pyramid, what would be the impact on the other species
    of the ecosystem?


  1. Can efforts to save a species
    from extinction be successful if the focus of preservation is only on that
    species? Explain your answer


  1. Considering the amount of
    energy required in producing animal-based foods and goods, should humans
    change their habits so they consume products closer to the bottom of the
    trophic pyramid? Provide rationale for your response.


assignment requires a minimum of two peer reviewed references to be included.


this assignment according to the guidelines found in the GCU Style Guide,
located in the Student Success Center.


assignment uses a grading rubric. Instructors will be using the rubric to grade
the assignment; therefore, students should review the rubric prior to beginning
the assignment to become familiar with the assignment criteria and expectations
for successful completion of the assignment.


You are
not required to submit this assignment to Turnitin, unless otherwise directed
by your instructor. If so directed, refer to the Student Success Center for
directions. Only Word documents can be submitted to Turnitin.

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