Population Dynamics
Population density
What is the number of organisms per unit area
Density-Dependent
What is Depends on population density per unit area?
what is a problem with random sampling
it can be inaccurate depending on what squares are landed on
which is when creatures enter
Immigration with an I
which is when creatures leave
emmigration with an E
Emmigration
What is the number of individuals moving away from a population?
Factors that affect carrying capacity (there are 4)
Agriculture
Domestication of animals
Medicine
Improvements to shelter
about how far on campus did we random sample
about half not quite the gyms
what is it when a population can not grow anymore
carrying capacity
a disease or natural disaster that causes a reduction of poulation
what is a limiting factor
Exponential growth
What is occurs when the growth rate is proportional to the population size?
Zero Population Growth
What is, when birth + immigration = death + emigration?
estimated count divided by actual count and multiply by 100
percent error
an example of a dependent limiting factor
disease predation competition
what is the difference between R and K strategies
R:rate as many kids as possible
K:Take care of the kids
A population stops increasing when...
What is the number of births < number of deaths, or when emigration > immigration?
Age Structure
What is the number of males and females in each of three age groups:
pre-reproductive stage
reproductive stage
post-reproductive stage
describe how to random sample
Using a satellite image, make a rough estimate (educated guess) as to how many trees are on campus. Do not count individual trees now, there is no wrong answer here. We will use this to compare to later.
Create and articulate a plan for accurately sampling the area (30 points)
Explain your step-by-step plan to collect and analyze the data
Think of ways to make your estimate more accurate
an example of an independent limiting factor
natural disasters human stuff invasive species
fit these three into groups based of reproduction methods
bunnies, flies, lions, and snakes
R:Snakes and Flies
K:lions
Bunnies are some kind of middle ground provide a reasonable argument
K-strategy
What is produce a few offspring that are more likely to survive due to parental care?
There are 300 bears in 1500 square miles, find the number of bears per unit area
0.2 bears per square mile?
how to calculate population of a thing via random sampling
average number of sampled trees multiplied by the total number of squares
what is the equation for population growth %
Growth Rate% = ( (BR-DR)+(IM-EM) ) / 100
one of the three population dispersions
uniform
random
clumped