Chapters 8 and 9 Flashcards
Which of the following is a feature of population
size, distribution and density
what is not: number of species
The California newt is found only in California. this is an example of a_______ species
endemic
a group of local subpopulations is called a
metapopulation
The area inhabited by all individuals of a particular species is known as the population’s
geographic range
A population’s density is calculated as the
number of individuals per unit area
what represents a measure of ecological density
number of frogs per meter
The demographic age pyramid of a rapidly growing population is
wide at the base, narrow at the top
The movement of individuals in space is called
dispersal
If more individuals move out of a forest than into it every year, the _____ rate of the forest is high
emigration
Why is pacific salmon movement into freshwater streams considered migration if the salmon die at the head of the stream and never return to the ocean
because their offspring return to the ocean, the entire population participates in the migratory event via different life stages
How might a species range be extended
through climate change
What was propagated and promoted for use by the Soil Conservation Service but is now listed as a federal Noxious Weed
kudzu
When the conditions are favorable for a population at low density, such as when a species colonizes a new environment, population growth is typically
exponential
A systematic compilation of mortality and survival data for a population is called a
life table
Age-specific mortality is defined as the
proportion of deaths that occur during a time interval within the age group of a population
