AP Biology Ecology Topic 3 - Community Interactions
Instructions:
Topic Presentation:
Supplementary Resources:
Videos by Paul Anderson:
Questions to answer:
Things you should make sure you understand:
Instructions:
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Open the presentation.
Interact with it.
Answer the “Questions to answer”.
Make sure you understand the “Things you should make sure you understand”.
Feel free to view the “Supplementary Resources”.
Write down any questions that you have about the material.
Topic Presentation:
click here
Textbook Reading:
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Chapter 54 (whole chapter)
Listen and Look: Here is a list of key terms and concepts you will hear about and see during these podcasts and
chapter readings. Get to know them! Be able to connect them to one another using a concept map.
KEY TERMS
Niche
Mimicry
Symbiosis
Keystone species
Coevolution
Food chain
Species abundance
Fundamental niche
Batesian mimicry
Parasitism
Herbivory
Food web
Trophic levels
Realized niche
Mullerian mimicry
Commensalism
Predation
Aposematic coloration
Biomass
Primary succession
Secondary succession
Mutualism
Competitive exclusion
Resource partitioning
Species richness
Supplementary Resources:
Crashcourse Biology Videos::
Community Ecology: Feel the Love - Crash Course Ecology #4
Community Ecology II: Predators - Crash Course Ecology #5
Ecological Succession: Change is Good - Crash Course Ecology #6
Videos by Paul Anderson:
“Niche”
“Communities”
“Coevolution”
“Ecological Succession”
“Biodiversity”
Questions to answer in your ISN:
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Explain how competition contributes to competitive exclusion, resource partitioning, and
character displacement.
Explain how predation contributes to changes in coloration (aposematic and cryptic) and the
evolution of mimicry (Batesian and Mullerian). Using a Venn diagram, compare and contrast
Batesian and Mullerian mimicry. Give examples of organisms that employ these types of
mimicry.
Justify, using examples of mutualism and parasitism, the evolutionary benefit of these two types
of interspecific interactions and explain how your examples fit those definitions.
Why are ecologists unsettled on whether or not there are any truly commensal interactions
among organisms?
Things you should make sure you understand:
(feel free to ask questions about them in class)
● The details of all interactions discussed in this presentation and examples of each.
● How the interactions among members of a community can contribute to emergent properties in
the ecosystem.
● How to calculate biodiversity of a community in terms of the Shannon diversity index.
● The effects of community interactions on the trophic structure of a community.
● The effects of energetic and environmental factors on the trophic structure and the diversity of a
community.
● How disturbance and succession specifically function to structure a community.
● How island-biogeographical theory can be used to analyze the trophic structure and diversity of a
community.