Term
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Definition
| Concerned with changes in population size and the factors that regulate populations over time |
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Term
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Definition
| Number of individuals of a species per unit area or volume of habitat |
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Term
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Definition
| Distribution of individuals in different age groups |
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Term
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Definition
| Track survivorship, the chance of an individual in a given population surviving to various ages |
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Term
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Definition
| Plot of the number of individuals still alive at each age in the maximum life span |
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Term
| Type I survivorship curve |
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Definition
humans and other large mammals -
Usually produce few offspring but give them good care, increasing likelihood that they will survive to maturity |
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Term
| Type II survivorship curve |
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Definition
| Intermediate, with survivorship constant over the life span. Individuals are no more vulnerable at one stage of the life cycle than another. Invertebrates, lizards and rodents. |
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Term
| Type III survivorship curve |
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Definition
| low survivorship for the very young, followed by a period when survivorship is high for those few individuals who live to a certain age. Species with this type of survivorship curve usually produce very large numbers of offspring but provide little or no care for them. Ex: fISH |
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Term
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Definition
| The set of traits that affect an organism's schedule of reproduction and survival. (Age at first reproduction, frequency of reproduction, number of offspring and amount of parental care given) |
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Term
| Opportunistic Life History |
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Definition
| One that enables the plant or animal to take immediate advantage of favorable conditions. Type III survivorship curve. |
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Term
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Definition
| Pattern of developing and reaching sexual maturity slowly and producing few, well-cared-for offspring. Type 1 survivorship curve. |
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Term
| Exponential population growth |
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Definition
| Expansion of a population in an ideal, unlimited environment. |
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Term
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Definition
| Environmental factors that restrict population growth. |
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Term
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Definition
| Maximum population size that a particular environment can sustain |
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Term
| Logistic population growth |
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Definition
| Growth rate decreases as the population size approaches carrying capacity |
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Term
| Intraspecific competition |
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Definition
| Competition between individuals of the same species for the same limited resources |
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Term
| Density Independent facor |
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Definition
| Population limiting factor whose intensity is unrelated to population density |
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Term
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Definition
| One that is in danger of extinction |
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Term
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Definition
| Those that are likely to become endangered in the foreseeable future. |
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Term
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Definition
| Non-native species that has spread far beyond the original point of introduction and causes environmental or economic damage by colonizing and dominating suitable habitats. |
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Term
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Definition
| Intentional release of a natural enemy to attack a pest population |
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Term
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Definition
| Estimate of the amount of land and water required to provide the raw materials an individual or a nation consumes. Includes food, fuel, fresh water, housing and waste disposal. |
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