AP Bio: Ecology
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Created by:
thinknlarge on January 11, 2010
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26 terms
Terms | Definitions |
|---|---|
 Density independent | A birthrate or death rate that doesn't change w/ population density is called what? |
| density dependent | A death rate or birthrate that rises as population density rises is said to be what? |
| competition, territoriality, health, predation, toxic wastes, and intrinsic factors | What are the density dependent factors? |
| negative feedback | What is the process by which the product of the process shuts down its own production? |
| metapopulation | What occurs when a group of populations is linked by immigration and emigration? |
| demographic transition | The movement from the first to the second state is called the what? |
| age structure | What is the relative number of individuals at each stage? |
| ecological capacity | What is the term for the actual respirce base of each country? |
| arable land, pasture, forest, ocean, built-up land, and fossil energy land | What are the six types of ecologically productive areas which calculate the ecological footprint? |
| nonequilibrium model | What describes communities as constantly changing after being buffeted by disturbances? |
| high level of disturbance | What is the result of a high intensity and high frequency of disturbance? |
| intermediate disturbance hypothesis | What suggests that moderate levels of disturbance can create conditions that foster greater species diversity than low or high levels of disturbance? |
| ecological succession | What is the proccess in which a disturbed area may be colonized by a variety of species, which are gradually replaced by other species, which are in turn replaced by other species? |
| primary succession | When a species begins in a virtually lifeless area where soil hasn't yet formed, it is called what? |
| secondary succession | What occurs when an existing community has been cleared by some disturbance that leaves the soil intact? |
| tropical | What kinds of habitats support the most species? |
| evolutionary history and climate | The habitat that supports the most species is that way because of what two factors? |
| solar energy input and water availability | What are the two main climatic factors correlated with biodiversity? |
| evapotranspiration | The climatic factors of biodiversity can be considered together by measuring a community's rate of what? |
| evatranspiration | What is the evaporation of water from soil plus the transpiration of water from plants? |
| species area curve | What is the name of the pattern that the larger the geographic area of a community, the greater the number of species? |
| Island equilibrum model | What model has something to do with islands? |
| Production efficiency | What is the fraction of energy stored in food that isn't used for respiration? |
| Trophic efficiency | What is the percentage of production transferred from one trophic level to the next? |
| turnover time | What is the standing crop biomass divided by production? |
| green world hypothesis | According to which hypothesis, terrestrial herbivores consume relative little plant biomass because they are held in check by a variety of factors, including predators, parasites, and disease? |
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