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31 Cards in this Set
- Front
- Back
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Exponential Growth
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Unlimited Growth
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Compare and contrast exponential and linear population growth
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Comparison: They both show growth.
Contrast: Exponential growth shows unlimited growth. Linear growth is adding a fixed amount each time period. |
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Compare short and long life history patterns
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A short (rapid) life history pattern:
(1) is common among organisms from changeable environments. (2) These organisms are usually small, mature fast, reproduce early, and have a short live span. (mosquito) Long life patterns: (1) Common among organisms that live in stable environments. (2) These organisms typically reproduce and mature slowly, and are long lives. (3) They are large species environments. (humans, elephants, bears) |
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Describe how density-dependent and density independent factors regulate population growth
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There are two kinds of limiting factors that affect growth:
(A) Density-dependent factors: (1) These factors have a greater effect as the population grows. (2) Ex: disease, competition, predators, and foods. (B) Density-independent factors: (1) These factors affect populations regardless of their size. (2) Example: floods, fires, volcano eruptions, drought, pesticides. |
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How can food supply affect the carry capacity of a habitat?
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Carrying capacity is the number of organisms of one species that an area can support.
If a populations grows exponentially and overshoots carrying capacity then it will be faced with limiting factors. As a result the population will fluctuate around its carrying capacity. Example: The species may have to leave iss area and go out and find food elsewhere. |
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What clues can an age structure graph provide about the future of a country's population growth?
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Age structure is the proportions of the population that are in different age levels. Age structure diagrams show how a population is distributed. It divides the population into the pre-productive
Allie.... Isn't there probably more to this answer? |
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What is the relationship between limiting factors and carrying capacity?
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Limiting factors are things that prevent a population from growing any larger. The carrying capacity for an area is the number of individuals who can be supported in a given area.
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How do birthrate and death rate affect the growth of a population?
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Birthrate and death rate can affect the growth of a population by throwing off all of the numbers that scientist have made.
So there is a formula to determine PGR (Population Growth Rate) (B+I) + (D+E) =PGR as that rate is not always accurate due to the difficulty of tracking immigration and emigration numbers we use B-D= PGR |
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Define Biodiversity
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Biodiversity is the variety of species in a specific area.
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What is the importance of biodiversity?
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A. Importance to nature:
(1) Living things are interdependent. (2) If the symbiotic relationships among organisms are broken due to the loss of one species, then the remaining species will also be affected. B. Biodiversity brings stability (1) Ecosystems are stable if thier biodiversity is maintained. C. Importance to People |
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What clues can an age structure graph provide about the future of a country's population growth?
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Age structure is the proportions of the population that are in different age levels. Age structure diagrams show how a population is distributed. It divides the population into the pre-productive
Allie.... Isn't there probably more to this answer? |
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What is the relationship between limiting factors and carrying capacity?
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Limiting factors are things that prevent a population from growing any larger. The carrying capacity for an area is the number of individuals who can be supported in a given area.
|
|
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How do birthrate and death rate affect the growth of a population?
|
Birthrate and death rate can affect the growth of a population by throwing off all of the numbers that scientist have made.
So there is a formula to determine PGR (Population Growth Rate) (B+I) + (D+E) =PGR as that rate is not always accurate due to the difficulty of tracking immigration and emigration numbers we use B-D= PGR |
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Define Biodiversity
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Biodiversity is the variety of species in a specific area.
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What is the importance of biodiversity?
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A. Importance to nature:
(1) Living things are interdependent. (2) If the symbiotic relationships among organisms are broken due to the loss of one species, then the remaining species will also be affected. B. Biodiversity brings stability (1) Ecosystems are stable if thier biodiversity is maintained. C. Importance to People (1) Humans depend on other organisms for their needs. (example: oxygen, food, clothing, etc.) (2) Active compounds found in drugs / medicine are usually derived from other living things. (example: pnicillin, quinine, cyclosporine) (3) Preserving biodiversity ensures there will be a supply of living things, some of which may provide future drugs. |
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Exponential Growth
|
Unlimited Growth
|
|
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Compare and contrast exponential and linear population growth
|
Comparison: They both show growth.
Contrast: Exponential growth shows unlimited growth. Linear growth is adding a fixed amount each time period. |
|
|
Compare short and long life history patterns
|
A short (rapid) life history pattern:
(1) is common among organisms from changeable environments. (2) These organisms are usually small, mature fast, reproduce early, and have a short live span. (mosquito) Long life patterns: (1) Common among organisms that live in stable environments. (2) These organisms typically reproduce and mature slowly, and are long lives. (3) They are large species environments. (humans, elephants, bears) |
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Describe how density-dependent and density independent factors regulate population growth
|
There are two kinds of limiting factors that affect growth:
(A) Density-dependent factors: (1) These factors have a greater effect as the population grows. (2) Ex: disease, competition, predators, and foods. (B) Density-independent factors: (1) These factors affect populations regardless of their size. (2) Example: floods, fires, volcano eruptions, drought, pesticides. |
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|
How can food supply affect the carry capacity of a habitat?
|
Carrying capacity is the number of organisms of one species that an area can support.
If a populations grows exponentially and overshoots carrying capacity then it will be faced with limiting factors. As a result the population will fluctuate around its carrying capacity. Example: The species may have to leave iss area and go out and find food elsewhere. |
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What are the two reasons for a species to become threatened or endangered?
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(1) Hunters
(2) Loss of Habitat Allie....is there more? |
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What is habitat fragmentation?
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Habitat Fragmentation is the sepation of wilderness areas from other areas.
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Explain how land that gets broken up can contribute to loss of species.
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1. Increased extinction of local species.
2. Disruption of ecological processes. 3. New opportunities for invasions by other species. 4. Increased risk of fire. 5. Changes in local climate. |
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What is the edge effect?
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The edge effect: the areas where one habitat or ecosystem meets another.
When an edge changes, animals from one area might migrate into another, thereby bringing species from different ecosystems in contact with one another. |
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How can change in an ecosystem's edges affect organisms?
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1. They are sharing their environment with other animals.
2. Habitat can be degraded by pollution (water, land, air) Eventually habitats are ruined. |
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How can exotic species affect populations of native species?
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1. These species are introduced on purpose or by accident to a new area.
2. When this happens, they can grow exponentially and can cause serious harm to native species in the area. |
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How does the U.S. Endangered Species Act help to protect or preserve endangered species?
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(1) It made it illegal to harm any species on the endangered or threatened list, and made it illegal for federal agencies to fund any project that would harm organisms on their lists.
(2) Worldwide, the Convention on International Trade in Endangered Species (CITES) has established lists of species for which international trade is prohibited or controlled. (endorsed by more than 102 countries) |
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What is one problem with the reintroduction programs that use captive-born animals?
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The animals are ill equiped to survive in the wild.
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How can habitat degredation cause changes in an area's biodiversity?
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Habitat Degredation is the damage to a habitat by pollution.
When air, water, land pollution, acid precipitation, and UV waves damage a habitat the native species can be seriously harmed both plant and animal. |
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Explain why water is not subject to loss, but subject to degredation?
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Loss of water would be bad, but animals might at least migrate. Water degredation however has a direct effect on its inhabitants. When water gets polluted, all of the fish could die.
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What is the difference in the fields of conservation biology and ecology?
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I. Do. Not. Know.
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