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Chapter 53
biol 130 exam 2
| Term | Definition |
|---|---|
| Population | It's just of individuals of a species that interact with one another within a given area at a particular time |
| Popularity density | The number of individuals per unit area or volume |
| Population dynamics | Patterns and processes of change in populations |
| Immigration | movement of individuals into an existing population |
| Emigration | movement of individuals out of an existing population |
| metapopulation | Group of geographically isolated populations linked together by dispersal |
| Graphic range | The entire range of a species my consist of one or multiple metapopulations |
| endemic species | occur in one particular location and nowhere else on earth |
| dispersion | distribution pattern at a place |
| random | lacking pattern or order |
| uniform | caused by territoriality or allelopathy |
| clumped | caused by clonality, animal feeding together, or herding |
| demography | the study of population processes |
| demographic events | births, deaths, immigration, emigration |
| quadrants | Individuals counted present a measured area |
| transect | Linear line drawn across the populations range |
| mark-recapture method | Come on in releasing some individuals, then later capturing another sample of individuals |
| population growth | Change in population size overtime |
| carrying capacity | K, the number of individuals of a species that can be supported in an environment indefinitely |
| environmental resistance | Reduction in population growth by preemtion |
| logistic growth | Pattern that forms and S-shaped curve |
| density-dependent | effect increases in proportion to population density |
| density-independent | impact does not depend of population density |
| life table | Keeps track of democratic events |
| cohort | life table tracks individuals born at the same time |
| survivorship | Numbers that are still alive at least dates |
| mortality | Each age class that dies before reaching next each class |
| fecundity | Need number offspring produced per surviving adult |
| static life table | Population sampled at a single point in town, when cohort cannot be tracked through time |
| Survivorship curve | plot of proportions of individuals surviving through each life stage |
| convex curve | late loss, high survivorship throughout life, majority reach maturity |
| diagonal curve | constant loss, independent of age |
| concave curve | Early loss, low mortality after maturity |
| life history | Lifetime pattern of growth, reproduction, and survival |
| life history strategy | How is species allocates resources to grow, produced, and survive |
| semeparity | Reproduces only ones |
| iteroparity | Reproduces more than once |
| trade-offs | Energy devoted to one life history trade can reduce the amount available for others |
| r-strategies | Life history strategies that allow for high intrinsic rate of increase |
| k-strategies | Life history searches allowed them to persist at or near the carrying capacity |
Created by:
acatherine04
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