System Reliability and Fault Tolerance Reliable Communication Byzantine Fault Tolerance.
Tolerance, Habitat, and Niche - MRS. KREIDERjkreider.weebly.com/uploads/4/7/1/0/47104229/... · and...
Transcript of Tolerance, Habitat, and Niche - MRS. KREIDERjkreider.weebly.com/uploads/4/7/1/0/47104229/... · and...
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Tolerance, Habitat, and Niche
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Why does a frog live in a pond and not the desert?
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Why does a polar bear live in the arctic and not on a tropical beach?
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What determines where an organism lives?
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Tolerance
● Every species has its own range of tolerance.
● Tolerance is the ability to survive and reproduce under a range of environmental circumstances.
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Tolerance ● When an environmental condition, such as temperature,
extends in either direction beyond an organism’s optimum range, the organism experiences stress.
● The organism must expend more energy to maintain homeostasis, and so has less energy left for growth and reproduction.
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Tolerance ● Organisms have an upper and lower limit of tolerance
for every environmental factor.
● Beyond those limits, the organism cannot survive.
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Tolerance
What is the optimum pH range for this fish population?
10.0 9.0 8.0 7.0 6.0 5.0 4.0
pH Level
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Tolerance
At what pH range will the fish population become stressed?
10.0 9.0 8.0 7.0 6.0 5.0 4.0
pH Level
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Tolerance
What is this fish population’s pH tolerance limit?
10.0 9.0 8.0 7.0 6.0 5.0 4.0
pH Level
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Tolerance
How might acid rain affect this fish population?(acid = low pH)
10.0 9.0 8.0 7.0 6.0 5.0 4.0
pH Level
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Habitat ● A species’ tolerance for environmental conditions helps
determine its habitat.
● Habitat is the place where an organism lives.
● An organism’s habitat is it’s “address.”
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Habitat A monkey’s habitat is:
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Habitat A shark’s habitat is:
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Habitat A fungus’ habitat is:
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Habitat A polar bear’s habitat is:
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Niche
● An organism’s niche describes not only the environment where it lives, but HOW it interacts with its environment.
● 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.
● An organism’s niche is its “job” in a particular environment.
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Niche
● Physical conditions of an organism’s niche involve the abiotic factors required for survival. ✓ Ex. temperature, water, sunlight
Most amphibians, for example, lose and absorb water through their skin, so they must live in moist places.
If an area is too hot and dry, or too cold for too long, most amphibians cannot survive.
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Niche
● Biological conditions of an organism’s niche involve the biotic factors required for survival.✓ Ex. diet, mating season, competition
Birds on Christmas Island in the Indian Ocean, for example, all live in the same habitat but they prey on fish of different sizes and feed in different places.
Thus, each species occupies a distinct niche.
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Niche
Which organism’s niche is to make webs to catch insects to eat?
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Niche
Which organism’s niche is to build dams to flood an area to build a lodge?
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Niche
Which organism’s niche is to decompose a dead tree and return nutrients to the soil?
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Niche
Which organism’s niche is to navigate the ocean and eat plankton and krill?