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48 Cards in this Set
- Front
- Back
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Group of organisms that live in a specific area |
Population |
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Means that as a population gets larger, it also grows at a faster rate. |
Exponential Growth |
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The number of organisms that an environment can support indefinitely |
Carrying Capacity |
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Reproduces quickly, smaller body, can live in unstable environment, matures rapidly, shorter life spans |
Rapid life history |
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The study of population growth characteristics |
Demography |
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Reproduces slowly, large body, lives in unstable environment, matures slowly |
Slow life history |
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Number of births per 1000 people |
Birth rate |
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Number of deaths per 1000 people |
Death rate |
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The ability to reproduce offspring |
Fertility |
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Time needed for population to double in size |
Doubling time |
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Show proportions of a population at different age levels |
Age structure graph |
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Movement of humans out of an area |
Emigration |
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Movement of humans into an area |
Immigration |
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Variety of species in a specific area |
biodiversity |
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Disappearance of a species when the last of its members dies
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Extinction |
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Example of Extinction |
Passenger Pigeon |
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When a species numbers are so low that extinction is possible.
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Endangered Species |
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Example of Endangered species |
Black Rhino |
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When the population of a species is likely to become endangered
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Threatened Species |
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examples of threatened species |
African Elephant |
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Separation of wilderness areas from each other so they become unstable |
Habitat fragmentation |
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May have different abiotic factors on each edge and causes problems when new edges are created by man
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Edge effect |
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Damage to a habitat by pollution
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Habitat Degradation |
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example of Habitat degradation |
Acid precipitation |
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a layer in the earth's stratosphere at an altitude of about 6.2 miles (10 km) containing a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun
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Ozone layer |
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Not native to a particular area
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Invasive species |
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the state or period of being held, imprisoned, enslaved, or confined.
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Captivity |
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Study and implementation of methods to protect biodiversity, strategies include natural resource and species conservation
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Conservation biology |
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an area of habitat connecting wildlife populations separated by human activities or structures |
Habitat corridor |
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materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain.
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Natural Resources |
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Release of organisms into an area where they once lived
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Reintroduction programs |
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Made it illegal to harm any species on the endangered of threatened species list
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US Endangered Species Act of 1973 |
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What are the characteristics of exponential growth and growth with limiting factors? |
Exponential growth has no limiting factors- makes J curve Limiting factors curve looks like and S |
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Any factor limiting the size of a population whose effect is dependent on the number of individuals in the population |
Density dependent factors |
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Any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population
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Density independent factors |
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Example of density dependent factor |
disease |
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Example of density independent factor |
earthquake |
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How do predators affect population size |
Predator Prey relationships Example - snowshoe hare and lynx |
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location with low biodiversity |
Antarctica |
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Why is biodiversity important to culture and people |
-Completes food chains/webs -animals cannot live without other plants -brings stability |
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example of water pollution |
Chemical |
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Example of land pollution |
Pesticides of Fertilizers |
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what is a major threat to biodiversity? |
Habitat loss |
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What happens when habitats are lost? |
species Flee or die out |
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what does acid rain do to a habitat? |
unwanted growth of algae and other nuisance plants
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what has been done to preserve habitats |
national parks and nature preserves |
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what is used with DDT |
when breathed in, It can cause cancer and miscarriages |
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Describe three types of threats to biodiversity, with examples
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Invasive species - cane toadsHabitat degradation - acid precipitationHabitat fragmentation - a road splitting a forest in half |
