| Definition | Term |
|---|
| the variable traditionally plotted on the horizontal, or 'x' axis of a scatter plot | |
| the actual niche of a species whose distribution is restricted by biotic interactions such as competition, predation, disease, and parasitism | |
| a group of individuals that are physically distinctive and engage in specialized behavior within a social unit, such as a colony | |
| chemical substance secreted by some animals for communication with other members of their species | |
| a group of spatially separated subpopulations connected by active exchange of individuals among subpopulations | |
| an area of population ecology concerned with the factors influencing the expansion, decline, or maintenance of populations, including rates of births, deaths, immigration, and emig | |
| sexual selection occuring when members of one sex choose mates from among the members of the opposite sex on the basis of some anatomical or behavioral trait, generally leading to | |
| sex that produces larger, more energetically costly gametes (eggs or ova) | |
| a group of individuals of the same age | |
| a distribution of individuals in a population in which individuals are uniformly spaced | |
| a graphical summary of patterns of survival in a population | |
| the environmental factors that influence the growth, survival, and reproduction of a species | |
| Study of the relationships between organisms and environment that are mediated by behavior | |
| a table of age-specific survival and death, or mortality, rates in a population | |
| a pattern of growth that produces a sigmoidal, or s-shaped, population growth curve | |
| a portion of a larger population, with which it sustains a connection through immigration and emigration | |
| number of offspring contributed by an individual relative to the number of offspring produced by other members of the population. | |
| population growth that produces a j-shaped pattern of population increase | |
| results from differences in reproductive rates among individuals as a result of differences in mating success due to intrasexual selection, intersexual selection, or a mixture of t | |
| lambda; ratio of the population size at 2 points in time | |
| variable traditionally plotted on the vertical or 'y' axis of a scatter plot | |
| active or passive downstream movement of stream organisms | |
| phenomena that takes place on a local scale | |
| a branch of biology concerned with the study of social relations | |
| a distribution in which individuals within a population have an equal chance of living anywhere within an area | |
| the conditions under which helping kin should be favored by natural selection | |
| highly specialized sociality generally including individuals of more than one generation living together, cooperative care of young, and division of individuals into sterile, or no | |
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