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29 Cards in this Set
- Front
- Back
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1.
Define community. |
1.
A community is all of the populations of different species that live inn the same place at the same time |
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2.
Name the two kinds of community interactions |
2.
1.Community Interactions 2. Succession |
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3.
Name 3 kinds of Community Interactions |
3.
three community interactions are: Predator-prey competition and symbiosis |
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4.
Name 2 kinds of succession: |
4. 2 kinds of succession
Primary Secondary |
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5.
How do predators control the size of a population? |
5.
Over time, they wipe out ( eat) the prey. ex. Mtn. Lions eat deer |
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6.
What happens if there are no predators? |
6.
Then there is an overpopulation of prey. |
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7.
This can also work in reverse. How can prey also control the size of a population? |
7.
If there are few prey in an environment, what will the predators eat? so, there become fewer predators. ex. less deer mean mean not enough for mtn. lions to eat, so they die off in time. |
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8. Since N.J. has too many deer, what would happen to the Mtn .Lions population if they were reintroduced here?
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8. The mountain Lion (predator) would eat the deer (prey) and would keep reproducing until the prey ran out
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9.
Sometimes predators have more than just one food source What happens then? |
9..
It has little effect. The predator can use other sources and won't die off. |
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10.
An example of a case where predator/prey has no relationship is: |
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If cows became extinct, humans could still survive on chicken, fish, plants etc....so they won't die off. |
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11.
An example of predator -prey relationships is the graph on Island Royale |
11.
Look this up on Ms. Sipe's powerpoint or printout. It's a graph on wolves and moose. |
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12.
What is Competition? |
12.
Competition is the... interaction between two or more organisms or groups of organisms, that use a common limited resource. |
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Where can competition occur?
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may occur within or between populations
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14.
What is the Competetive Exclusion Principle? |
It says that no two species can occupy the same niche.
The species with the more rapid growth rate will out-compete the other. |
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15.
What is Demography? |
15.
the study of population ( dynamics)changes |
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16.
What does the term population dispersion refer to? |
16.
How the populations are spread out or arranged. |
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17.
What are the three types of population dispersion? |
17.
clumped uniform random |
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18.
Be able to draw these for quiz. clumped, uniform, random . |
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14.
What is the Competetive Exclusion Principle? |
It says that no two species can occupy the same niche.
The species with the more rapid growth rate will out-compete the other. |
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15.
What is Demography? |
15.
the study of population ( dynamics)changes |
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16.
What does the term population dispersion refer to? |
16.
How the populations are spread out or arranged. |
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17.
What are the three types of population dispersion? |
17.
clumped uniform random |
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18.
Be able to draw these for quiz. clumped, uniform, random . |
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Population Dynamics are influenced by these factors...
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Birth rate
Death rate Life expectancy |
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What affects population growth rates?
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it is increased by birth rate, immigration
it is decreased by death rate, emmmigration |
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What does the term Exponential growth mean?
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it occurs when there are ideal conditions and unlimited resources so that there is an increase in population size due to constant growth rate.
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What is meant by Logistic Growth?
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it is when population growth slows or stops following a period of exponential growth
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Why would there be Logistic Growth?
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birthrates might decrease or date rates might increase or both occur at ther same time
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What happens when a population reaches Carrying Capacity? ( K)
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at that point some will die or the birthrate will slow again
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