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Unit 5 Populations
| Question | Answer |
|---|---|
| Population Ecology | The study of the processes affecting the distribution and abundance of a group of organisms of the same species living in a given area at a given time. |
| Population Size | The numbers of individuals in a given area at a given time. |
| Population Distribution | Determining location and location patterns of a species. |
| Population Growth | Changes in the number of individuals in a given area. |
| Population Growth Rate | The speed at which population size is changing. |
| Nativity | The number or rate of births in a given area and time. |
| Mortality | The number or rate of deaths in a given area and time. |
| Immigration | The number or rate of organisms moving into a region. |
| Emigration | The number or rate of organisms moving out of a region. |
| Limiting Factors | Any factor that impacts nativity, mortality, immigration or emigration. |
| Carrying Capacity | The maximum size possible for a given population, in a given area, in a given time |
| Density Dependent Limiting Factor | A limiting factor whose effect on a population is impacted by the concentration of the population. |
| Density Independent Limiting Factor | A limiting factor whose effect on a population is not impacted by the population concentration. |
| Random Sampling | A sample that fairly represents a population because each member has an equal chance of inclusion. |
| Mark and Recapture | Capturing and marking organisms, then recapturing them and counting how many are marked (a sampling technique used to estimate the size of a population). |
| Age Pyramid | a graph showing the distribution of a population by sex, age, etc. |
| Survivorship Curve | Graph showing the number of survivors in different age groups for a particular species. |
| Exponential Growth Curve | j-shaped curve depicting what happens when a population is introduced to an area in which resources are limited. |
| Logistic Growth Curve | S-Shaped curve that depicts more realistically what happens when a population is introduced to an area in which resources are more typically finite or limited. |
| Allee Effect | Corelates the density of the population with the relative health of the individuals in that population. It is sometimes termed density stress. |
| Abiotic factor | nonliving (examples: wind, dirt, rocks) |
| Biotic factor | living (examples: fungi, plant, tiger) |
| Population density | number of organisms in a given area |
| Population Growth Formula | = Nativity + Immigration - Mortality - emigration |
| Population Growth Rate Formula | Population Growth / time |
| High mortality rate | high frequency of deaths in a specific population during a specified time |
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blozen88
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