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32 Cards in this Set
- Front
- Back
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Population growth equation |
Population growth = (births + immigration) - (deaths + emigration) |
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Open population |
Organisms are able to feel come and go. Affected by mortality, natality, immigration, and emigration |
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Closed population |
Only affected by mortality and natality |
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Exponential growth |
Population has grown very quickly over a short period of time |
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2 types of limiting factors |
-Density dependent -Density independent |
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Density dependent |
Depends on the size of a population. Ex. -Amount of food available -Number of predators and prey |
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Density independent |
Do not depend on the size of the population.
Ex. -Floods -Fires -Earthquakes |
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Maximum numbers of offsprings that a species can produce, if resources are unlimited are determined by 4 factors |
-Birth potential -capacity for survival -procreation -length of reproductive life |
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Birth potential |
Maximum number of offsprings per birth |
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Capacity for survival |
Number of offsprings that reach reproductive age |
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Procreation |
Number of times a year a species reproduces |
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Length of reproductive life |
Age of sexual maturity And the number of years it can reproduce |
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Law of minimum |
The nutrients in least supply is the one that limits growth |
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Law of tolerance |
An organism can survive within a certain rage of an abiotic factor Above or below this will limit the population |
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Population histogram |
A graph used to show the number of individuals in different age groups in a population Also called population pyramidCan be used to predict future changes Also called population pyramid Can be used to predict future changes |
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3 main histogram shapes |
-wide base -narrow base -narrow base, narrow top and wide middle |
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Histogram with wide base |
Represents a population that is increasing quickly |
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Histogram with a narrow base |
Represents a population that is either growing very slowly or one that is fairly stable |
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Histogram with a narrow base, narrow top, and wide middle |
Represnets a population that is decreasing in size |
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Carrying capacity |
The number of a population that can be supported indefinitely by the resources of a specific ecosystem |
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Carrying capacity of an ecosystem depends on 3 factors |
-amount of resource available in the ecosystem -size of the population -amount of resources each individual is consuming |
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Sustainability |
When resources are being used at a level that will allow them to continue indefinitely |
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Ecological footprint |
Meassures how an individual uses resources within an enviorment |
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Carbon cycle |
2 main chemical reactions: -photosynthesis -cellular respiration Both chemical reactions are processes that are the same frontward and backward |
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Photosynthesis |
Plants taking carbon dioxide from the atmosphere and water to make food and oxygen |
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Photosynthesis chemical equation |
CO2 + H2O + energy = glucose + O2 |
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Where does photosynthesis take place in a cell? |
Chloroplast |
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Cellular respiration |
All living things taking oxygen from the atmosphere Then releasing carbon dioxide into the atmosphere |
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Cellular respiration chemical reaction |
O2 + glucose = CO2 + H20 + energy |
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Where does chemical respiration takes place in the cell? |
Mitochondria |
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Processes which add carbon dioxide |
-Cellular respiration -decomposition -combustion/burning -erosion and weathering -diffusion -deforestaion |
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Processes which remove carbon dioxide |
-Photosynthesis -diffusion -sedimentation and compaction |
