Population Dynamics Flashcards
This is a group of individuals of the same species that live in the same geographical location at the same time and interact with each other
population
What is the only terrestrial mammal found on the Hawaiian Islands?
the Hawaiian hoary bat
In natural populations organisms tend to be clumped around where the _______ they need are located
resources
This is interacting groups of populations of the same species that are dispersed among patchy habitats but have occasional migration and interaction
meta-populations
In what 2 ways are meta-populations examined?
a. populations within each individual patch
b. how populations from multiple patches interact with each other
What happens when a population has a fixed rate?
birth rates and survival rates are constant overtime
What is stable age distribution?
age structure does not change from one year to the next
This is the number of individuals in a population that are young, old and in between
age structure
What happens when a lot of individuals in a population are young?
population grows
What happens when a large number of the population is past reproductive age?
population declines
this becomes greater and greater with each generation of offspring
exponential growth
This country is an example of exponential growth
India
This occurs when the growth rate decreases as the population reaches carrying capacity
logistic-growth
This is the maximum number of individuals in a population that an environment can support
carrying capacity
How many people live in India?
1.28 billion
India is the second most populated country in the world, which is the largest?
China
In which year will India be the most populated country?
2028
What can rapidly affect death and birth rates?
extremes in temperatures and precipitation, floods, hurricanes, fires
These are factors that have large impacts on populations
density-dependent factors
Density- dependent factors impact what?
growth, death and birth rates
What is commonly seen in a density-dependent factor?
competition, crowding, disease and stress
What is easier to spread in a dense population?
disease
This occurs when Density-dependent factors cause the populations to increase when numbers are low, and decrease when high
population regulation
What can cause a populations growth rate to drop to 0?
disease or limited resources
Why does the number of individuals in a population change?
available resource, physical factors, and movement of organisms
