30 Questions
Which of the following best describes species distribution?
The spatial arrangement of species that have dispersed
What is the fundamental question of ecologists regarding species distribution?
Why do species occur in a certain area?
What is dispersal in ecology?
The movement of individuals away from an area of origin
What can be a limitation to dispersal?
Physical barriers
What helps to explain patterns of species distribution?
Molecular evidence
Where are kangaroos primarily found?
Australia
Which type of interaction is described as a general term for any +/- interaction where one species benefits by feeding on another species?
Exploitation
What type of coloration deters predators through warning or bright coloration?
Aposematic coloration
What type of interaction involves one species killing and eating another species?
Predation
Which type of interaction involves one species benefiting while the other is not harmed?
Commensalism
What type of interaction occurs when both species benefit from the interaction?
Mutualism
What is the term for the number of species present in a community?
Species richness
Which type of community is more resistant to invasive species?
Communities with high species diversity
What is the role of dominant species in a community?
They are the most abundant or have the highest biomass
Which species have a pivotal role or niche in a community?
Keystone species
What is the term for species that dramatically alter their environment?
Ecosystem engineers
Which type of control occurs when a lower trophic level affects the community structure of higher trophic levels by means of resource restriction?
Bottom-up control
What does the top-down model postulate about community organization?
Predation controls community organization because predators control herbivores
Which of the following is a characteristic of Type I survivorship curve?
Flat at the start and during mid-life, then drops steeply among older age groups
What is the ecological niche of an organism?
The specific set of biotic and abiotic resources that an organism uses in its environment
What is the carrying capacity of a population?
The maximum population size that a particular environment can sustain
What is competitive exclusion?
When two species in a community compete for a limited resource and one species has a competitive edge, leading to the exclusion of the other species
What are interspecific interactions?
Interactions between individuals of two different species
How is a life table constructed?
By calculating the proportion of a cohort that survives from one age group to the next
Which of the following is NOT an abiotic factor that affects dispersal?
Predation
Which of the following is an example of a fundamental niche?
A species that can survive in a wide range of abiotic conditions
Which of the following is NOT a biotic factor that affects dispersal?
Temperature
What are the two most important abiotic factors that limit species distribution?
Temperature and moisture
What is the density of a population?
The number of individuals per unit area or volume
What is the mark-recapture method used for?
Estimating the size of a population
Test your knowledge on cohort studies and survivorship curves with this quiz! Learn about how cohorts are used to construct life tables and track individuals from birth to death. Explore the calculation of survivorship proportions and the creation of survivorship curves from life table data.
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