Download Biology EOC #14: Relationships Interpret relationships

Ecological
Relationships
(Page #4)
Interpret
relationships,
including predation,
parasitism,
commensalism,
mutualism, and
competition among
organisms
Ecology:
the study of
1. Organisms
2. Environment
3. and their
Interactions
Biotic Factors—
• Living organisms
Abiotic Factors–
• Non-living
• Physical aspects (water, air, rocks, heat, light,
altitude etc).
Quick Write:
• Give an example of how abiotic factors
determine the biotic factors that exist in an
ecosystem? Explain.
Competition:
• Two species compete for the same resource.
• Food, nesting sites, living space, light, mineral
nutrients, water
Predation:
+ X
• The act of one organism killing another for
food (lions and zebras, spiders and flies, great
grandma and chickens).
Symbiosis
• A close, long-term
ecological relationship
between two or more
species.
• These relationships are
essential to the balance
of nature. They occur all
around us and in us.
• Come up with one
example
Parasitism:
+-
• One organism feeds on and usually lives on
or in another (Eventually harmful to host).
Mutualism:
++
• Beneficial to both species
• Ants protect the aphids and the aphids feed
the ants.
Commensalism
• Beneficial to one species
but does not harm or
benefit the other species.
• While grazing, cattle
dredge up the soil as
nearby egrets feed on the
newly exposed insects.
The cattle are unaffected
but the egrets get easier
access to a food resource.
+0
Bell-Ringer (Complete on Page 3)
• Juvenile fish swim around jellyfish for a safe
haven from potential predators. What type
of ecological relationship is this?
Fictional Ecological Relationships #5
• Fold paper into 3 sections.
• Create Three Mini-Posters--one for each type of
symbiosis (parasitism, mutualism, and
commensalism).
• For each poster, create two fictional organisms.
• Each poster will illustrate how these two
organisms live together.
• Include title, 4 colors, sketch, and brief
explanation of relationship.