Podcast
Questions and Answers
A population of deer experiences a significant increase in deaths due to a contagious viral disease. How would this factor be categorized?
A population of deer experiences a significant increase in deaths due to a contagious viral disease. How would this factor be categorized?
- Emigration factor
- Density-independent factor
- Dispersion factor
- Density-dependent factor (correct)
Following a volcanic eruption that devastates a local ecosystem, which of the following population characteristics is MOST directly affected initially?
Following a volcanic eruption that devastates a local ecosystem, which of the following population characteristics is MOST directly affected initially?
- Age structure
- Density
- Dispersion
- Size (correct)
A population of nesting birds maintains a relatively even distance between individual nests. What dispersion pattern is MOST likely observed in this population?
A population of nesting birds maintains a relatively even distance between individual nests. What dispersion pattern is MOST likely observed in this population?
- Uniform (correct)
- Aggregated
- Random
- Clumped
A group of bison migrates to a new grazing area due to limited resources in their previous habitat. How does this movement MOST directly influence their original population's characteristics?
A group of bison migrates to a new grazing area due to limited resources in their previous habitat. How does this movement MOST directly influence their original population's characteristics?
A scientist observes that the death rate of a plant population increases significantly as the population density increases. This is MOST likely due to increased what?
A scientist observes that the death rate of a plant population increases significantly as the population density increases. This is MOST likely due to increased what?
Flashcards
Density-dependent Factors
Density-dependent Factors
Factors where the effect on a population varies based on the population's density. Examples: Predation, famine, disease.
Density-independent Factors
Density-independent Factors
Factors that affect a population regardless of its density. Examples: Volcanoes, forest fires, floods, earthquakes.
Population Size
Population Size
The total number of individuals within a defined population.
Population Density
Population Density
Signup and view all the flashcards
Population Dispersion
Population Dispersion
Signup and view all the flashcards
Study Notes
- Population size is limited by births, deaths, immigration, and emigration.
- Population density is the number of individuals per unit area or volume.
- Sampling techniques are used to estimate population sizes due to the difficulty of counting every organism.
- Population dispersion describes how individuals are spaced within their habitat.
Density-Dependent Factors
- Predation influences population size based on density.
- Famine affects populations depending on their density.
- Diseases spread more easily in dense populations.
- Accumulation of wastes or toxins is density-dependent.
Density-Independent Factors
- Volcanoes impact populations regardless of density.
- Forest fires affect populations irrespective of density.
- Floods are independent of population density.
- Earthquakes influence populations regardless of density.
Dispersion Patterns
- Clumped dispersion is the most common pattern.
- Example: Fish travel in groups for safety.
- Random spacing occurs without attractions or repulsions.
- Example: Trees in a forest may be randomly spaced.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
