Podcast Beta
Questions and Answers
Which of the following describes the component parts of an exponential growth model and how they interact?
Which type of factors provide feedback into a population model?
What are the factors that limit logistic growth?
What do r- and K-strategists refer to in population ecology?
Signup and view all the answers
What factor contributes to population regulation through accumulation?
Signup and view all the answers
Which of the following represents the maximum population size a given environment can sustain?
Signup and view all the answers
What pattern of mortality rates over an organism's life is seen in survivorship curve?
Signup and view all the answers
What does r (intrinsic growth rate) determine in the exponential growth model?
Signup and view all the answers
In which situation is the population decreasing, with death rates higher than birth rates?
Signup and view all the answers
What represents the per capita rate of increase in the population according to the exponential growth model?
Signup and view all the answers
Which example represents a trade-off between survival and paternal care?
Signup and view all the answers
What influences population growth and is considered a chance event or external factor?
Signup and view all the answers
What represents population growth following an exponential pattern, eventually reaching carrying capacity?
Signup and view all the answers
When is a stable population achieved?
Signup and view all the answers
What spacing patterns occur in birds such as black-browed albatross due to competition for nesting sites?
Signup and view all the answers
What represent single breeding vs. multiple breeding and their impact on the environment?
Signup and view all the answers
What does the logistic population growth model incorporate that the exponential population growth model does not?
Signup and view all the answers
In what type of conditions does exponential population growth occur?
Signup and view all the answers
What is the impact of population size on the rate of increase in exponential growth?
Signup and view all the answers
What are examples of density-dependent limitations on population size?
Signup and view all the answers
What types of limitations affect population size regardless of population density?
Signup and view all the answers
When does logistic growth begin to slow down?
Signup and view all the answers
What type of competition can result in resources becoming less available per capita as population density increases?
Signup and view all the answers
Which factors become more prevalent and effective as population density increases?
Signup and view all the answers
What does the J-shaped curve depict in relation to exponential growth?
Signup and view all the answers
What is the mathematical expression for the population growth rate?
Signup and view all the answers
What does the logistic growth model incorporate to limit growth?
Signup and view all the answers
What type of growth is depicted by a sigmoidal curve?
Signup and view all the answers
Study Notes
- Population growth rate is calculated as the difference between the number of births and deaths per individual during a specified time interval (birth rate - death rate)
- Population growth rate can be expressed mathematically as the change in population size (N) over time (ΔN Δt) and the per capita rate of increase (r)
- Exponential population growth refers to idealized conditions where population increase is at its maximum rate (rmax)
- Exponential growth is depicted by a J-shaped curve, with the rate of increase being constant but the population accumulating more new individuals per unit time when it is large than when it is small
- Logistic population growth is a more realistic population model that limits growth by incorporating carrying capacity (K), which is the maximum population size the environment can support
- Logistic growth is described by a sigmoidal curve, which begins slowing as the population nears its carrying capacity
- Factors that affect population size in relation to population density (density-dependent limitations) include competition, disease, predation, and territoriality
- Factors that limit population size regardless of population density (density-independent limitations) include climate, disease, volcanic eruptions, and human activities
- Competition can occur between species (interspecific competition) or within species (intraspecific competition), and can result in resources becoming less available per capita as population density increases
- Disease and predation can also affect population size, with disease becoming more prevalent and predation becoming more effective as population density increases.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers the concepts of population growth models, including exponential and logistic growth, as well as the factors that limit population growth. It also explores the feedback provided by density-dependent and density-independent factors.
