population characteristics
If the Population Growth rate is negative what does that indicate
What is
The population is declining
what is carrying capacity
What is
Maximum number of individuals an environment can support long-term
Define Demographic Transiiton
What is
The change from high birth and death rates to low birth and death rates
What is exponential growth
What is
When we see a drastic increase in growth
Emigration vs Immigration
Emigration = exit
Immigration = Coming in
Dispersion
What is
The pattern of spacing of a population within an area.
What is each individual square called
What is
Quadrat
What is Demography
What is
The scientific study of human populations size, density, distribution, movement, and birth and death rates
2What type of curve does a logistic graph make
S curve
Natality
What is
Birth rate of population in a given year
What is Population Density formula
What is
Number of organisms ÷ Area occupied
Why do biologist use random sampling
What is
Random sampling saves time, it is unbiased, and is likely to mirror the overall population
What is age structure and what are the 3 age groups
What is
The distribution of males and females across three age groups: pre-reproductive, reproductive, and post-reproductive
What is r strategy give an example
What is
When an organism has many off spring quickly, little to none parental care,
Ex: Fish, insects
Density dependent factor AND Density independent factor
What is
Any factor in the environment that depends on the number of members in a population per unit area
Any factor in the environment that does not depend on the number of of members in a population per unit area
What is The Case Study of Isle Royale
What is
Wolves entered Isle Royale after they crossed Lake Superior when it was frozen. They started reproducing and eating the moose population. There is a decline in moose population and an increase in wolf population.
what is random sampling
what is
A technique where individuals or elements are selected from a population purely by chance, ensuring each has an equal probability of being chosen. Biologists use this in field studies by placing quadrats to collect representative data for a given area.
4 technological advances affecting human population
What is
1. Agriculture
2. Domestication of animals
3. Medicine
4. Shelter improvements
What is k-strategy
Few offspring, Extensive parental care,
Ex: Mammals, birds
Zero population Growth (ZPG)
what is
When birth + immigration = death + Emigration resulting in a stable population size
How could you fix the Case Study of Isle Royale
What is
Human intervention, hunting, spreading a disease, adding a predator for the wolves
What is percent error formula
What is
experimental subtracted by actual number then divided by the actual number then multiplied by 100
formula for Population growth Rate %
what is
(Births - deaths) + (Immigration - emigration)
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If there is 400 bears in 1200 square miles what is the population density
what is
0.3 bears per square mile
Give the 4 density dependent factors and the 4 density independent factors
What is
Predation, Competition Disease, Parasites
Weather events, Fire, human landscape altercation, Pollution