Download Cornell Notes Template - Ms. Doran`s Biology Class

Name: __________________________
Topic: ________4.2____________
Essential Question:
Questions/Main Ideas:
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1.
Notes:
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1. A niche is the range of physical and biological conditions in which
a species lives and the way the species obtains what it needs to
survive and reproduce
a. Aka it’s role in the ecosystem
b. Niche-Involves:
i. Resources available-any necessity of life
En 2: Give an example of a resource:
ii. Physical factors-how it interacts with abiotic factors
En 3: Give an example of an abiotic factor an organism interacts with:
iii. biological aspects-how it interacts with biotic
factors
En 4: Give an example of a biotic factor an organism interacts with:
tolerance-the ability to survive and reproduce under a range of
environmental circumstances
a. When an environmental condition extends beyond an
organisms optimum range, it experiences stress
b. This means more energy is used for homeostasis, and less
for growth/reproduction
c. The species’ tolerance determines where its habitat is
Questions/Main Ideas:
2.
3.
Notes:
2. By causing species to divide resources, competition helps determine
the number and kind of species in a community and the niche each
species occupies
a. intraspecific competition-competition among members of the
same species
b. interspecific competition-competition among members of
different species
 Non native species can become invasive species if introduced
into a new environment
o May have no natural predators
o grow out of control
o Monopolize resources
 Competitive exclusion principle-no two species can occupy
exactly the same niche in exactly the same habitat at exactly the
same time
o The species that is better at competing for resources will
survive
 Organisms may divide resources instead of competing for them,
each forming their own niche
En 5: How did the North American warblers divide their resource?
3a. Predators
 affect the size of prey populations
 determine where the prey can live and feed
3b. Herbivores
 affect the size and distribution of plant populations
 determine the places certain plants can survive and grow
-Keystone species-species whose population dramatically affects the
structure of a community
En 6: Explain how otters are a keystone species
4.
4. There are 3 main classes of symbiotic (where organisms live
together) relationships:
a. Mutualism: relationship where both species benefit
b. Parasitism: relationship where one organism lives inside or on
another and harms it
c. Commensalism: relationship where one organism benefits,
and the other is neither helped nor harmed
En 7: give an example for each of the 3 symbiotic relationships:
Species 1
Species 2:
Type of relationship:
Mutualism
Parasitism:
Commensalism:
Summary
In your own words and in complete sentences, write a 3 – 4 sentence summary paragraph. Your summary should cover the main concepts of the notes, be accurate,
and have adequate details.