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A group of organisms that belong to the same species and live in a particular place at the same time. |
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| Measures how crowded a population is... |
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| The spatial distribution of individuals within the population. |
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| The number of births occuring in a period of time. |
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| The number of deaths in a period of time; Mortality Rate |
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| How long on average an individual is expected to live. |
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| The distribution of individual among different ages in a population |
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Show the probability that members of a population will survive to a certain age. |
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| The amount by which a population's size changes in a given time. |
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| The movement of individuals into a population. |
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| The movement of individuals out of the population. |
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| The observation that populations can grow in an exponential growth pattern. |
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| Any factor that retains the growth of a population. |
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| An exponential model that accounts for the influence of limiting factors. |
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Definition
The number of individuals the environment can support over a long period of time. |
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| Density-Independent Factors |
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Definition
Factors like weather, floods, and fires that reduce the population by the same proportion, regardless of the population's size. |
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| Density-Dependent Factors |
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Definition
Resource limitations, such as food shortages or nesting sites, and are triggered by increasing population density. |
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| Hunter-Gatherer Lifestyle |
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Definition
Obtaining food by hunting animals and gathering roots, berries, nuts, shellfish, and fruits. |
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Definition
Change in lifestyle when humans learned how to practice agriculte, and grow and harvest their own food. |
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| All modern industrialized countries in the world ( about 20%) |
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| Poorer countries with fast growing populations (80%) |
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| Model that shows the how population changes happen. |
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