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30 Cards in this Set
- Front
- Back
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Biotic Potential |
the capacity of a population of organisms to increase in numbers under optimum environmental conditions. |
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Logistic Growth |
The equation for the logistic model is . Here, t is time, N stands for the amount at time t, N0 is the initial amount (at time 0), K is the maximum amount that can be sustained, and r is the rate of growth when N is very small compared to K. |
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K-selected species |
K-selected species possess relatively stable populations and tend to produce relatively low numbers of offspring; however, individual offspring tend to be quite large in comparison with r-selected species. |
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Stress-related diseases |
Diseases caused by stress |
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Minimum Viable Pop. Size |
The minimum possible population size that a species needs to continue without extinction |
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Type 2 Survivorship Curve |
Species thats probability of dath is unrelated to age |
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J-shaped Curve |
the trend of a country's trade balance following a devaluation or depreciation under a certain set of assumptions. |
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Type 3 Survivorship curve |
Mortality peaks early in life |
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carrying capacity |
the maximum, equilibrium number of organisms of a particular species that can be supported indefinitely in a given environment.Abbreviation: K. |
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density dependent |
a situation in which population growth is facilitated by increased population density. |
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r-BIDE |
4 factors affecting growth rate: Birth, Immigration, Deaths, Emigration |
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Island Biogeography |
examines the factors that affect the species richness of isolated natural communities. |
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Metapopulation |
a group of populations that are separated by space but consist of the same species. |
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Age structure |
distribution of various age groups in a population |
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S-shaped curve |
A slowing rate of growth |
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Corridor |
a narrow tract of land forming a passageway, as one connecting two major cities or one belonging to an inland country and affording an outlet to the sea: |
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Population growth |
the increasein the number of individuals in a population. |
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Density indepenent |
Drought, fire, or other habitat destruction that affects an ecosystem |
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Abiotic |
of or characterized by the absence of life or living organisms |
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Founder effect |
the accumulation of random genetic changes in an isolated population as a result of its proliferation from only a few parent colonizers. |
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community |
an assemblage of interacting populations occupying a given area. |
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Population growth models |
An increase in the number of people that reside in a country, state, county, or city. |
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Die-off |
a sudden, natural perishing of large numbers of a species, population, or community. |
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inbreeding depression |
The loss of vigor and general health that sometimes characterizes organisms that are the product of inbreeding. |
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exponential growth |
the increase in a quantity according to the law. |
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r-selected species |
those that place an emphasis on a high growth rate, and, typically exploit less-crowded ecological niches, and produce many offspring, each of which has a relatively low probability of surviving to adulthood |
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biotic |
pertaining to life. |
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demographic bottleneck |
A few members of a species survive a catastrophic event such as a natural disaster |
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Type 1 survivorship curve |
Full physiological life span if organism survives childhood |
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Intrinsic growth rate |
The rate at which a population increases in size if there are no density-dependent forces regulating the population is known as the intrinsic rate of increase. |
