Download Community Ecology

Honors Biology
• I can evaluate the claims, evidence and reasoning that the
complex interactions in ecosystems maintain relatively consistent
numbers and types of organisms in stable conditions, but
changing conditions may result in a new ecosystem.
• Write down what you
observe about the picture
shown here.
• Compare your observations
with a neighbor.
• With your neighbor,
brainstorm 3 questions that
you have about the picture
that you wish to investigate.
Testable Questions
Observable Questions
Researchable Questions
Mutualism
Parasitism
Symbiosis
Commensalism
Community
Interactions
Competition
Competitive
exclusion
Predation
Herbivory
• Commensalism (+ / 0 )
• One species benefits, other is neither
harmed nor helped
• Ex: Cattle egrets and water buffalo
• Mutualism (+ / + )
• Both species benefit
• Ex: sea anemone and hermit crab
• Parasitism (+ / - )
• One species benefits, other is harmed
• Ex: heartworms in pets
• Predator-Prey (+ / -)
• One species kills and eats another
• Ex: fox and rabbit
• Herbivory (+ / -)
• Prey is a plant
• Ex: beetle and leaf
• Habitat
• Where an organism lives (“address”)
• Niche
• It’s role in its habitat (“profession”)
• Competitive exclusion
• If two species occupy the same niche,
one will out compete and eliminate the
other
• Two species can occupy the same
habitat but not the same niche
• Take out a piece of paper and number it 1-4
• For each of the video clips you are about to see, identify the
type of interaction between the organisms and state why it is
that type of interaction
• Video 1
• Video 2
• Video 3
• Video 4