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What is the study of the factors influencing population size, growth rate, growth forms, and distribution called?
Population ecology
Which of the following best defines a population?
A community consists of a population of a single species.
False
Match the following terms with their definitions:
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What parameters can affect the size of a population?
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What is the birth rate of a population referred to as?
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Emigration refers to one-way movement of organisms into an area.
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What is a closed population?
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If natality and immigration exceed mortality and emigration, what will happen to the population?
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What are the two types of limiting factors in population growth?
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Study Notes
Population Ecology
- The study of factors that influence the size, growth rate, growth forms, and distribution of individuals in a population.
- It examines how populations change over time and space.
Levels of Organization
- Individual: One organism of a particular species
- Population: A group of individuals of a particular species
- Community: Multiple populations of different species in the same area
- Ecosystem: Community of living organisms and the non-living factors around them
- Biome: A group of similar ecosystems
- Biosphere: All the ecosystems on Earth
Characteristics of Populations
- Density: Number of individuals per unit area
- Sex ratios: Ratio of the number of male to females in the population
- Pattern of distribution: Refers to how individuals are distributed over the area they occupy.
Population Parameters
- Natality: Birth rate of a population. Increases population size.
- Mortality: Death rate of a population. Decreases population size.
- Immigration: One-way movement of organisms into an area. Increases population size.
- Emigration: One-way movement of organisms out of an area. Decreases population size.
- Migration: Two-way movement of organisms, often in response to seasonal changes. Doesn't necessarily influence population size.
Population Growth
- Growth: Natality and immigration exceed mortality and emigration.
- Decline: Mortality and emigration exceed natality and immigration.
- Stable: Natality and immigration are roughly equal to mortality and emigration.
Closed Population
- A population in which immigration and emigration do not occur.
Limiting Factors
- Factors that regulate the growth of a population.
- Density-dependent factors: Factors that have a greater impact as population density increases (e.g. competition for resources, disease).
- Density-independent factors: Factors that affect the population regardless of density (e.g. natural disasters, climate change).
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Description
This quiz explores the key concepts of population ecology, including the factors that influence population dynamics such as size and growth rate. It covers levels of organization, characteristics of populations, and important population parameters like natality and mortality. Test your understanding of how populations interact with their environment and change over time.
