Population Distribution
3
Complete the formula: _____________/_____________= population density
population size; area
An age structure diagram can tell you if a population is growing, ______________, or _________________.
declining; staying the same (stable)
How many types are shown on a survivorship curve graph?
3
Uniform
Random
Clumped
Calculate the population density if there are 264 penguins living in an area measuring 22ft2.
12 penguins/ft2
Identify the shape of an age structure diagram that shows a growing population.
a triangle/pyramid shape; large at the bottom than the top
Give an example of an organism that has a Type 1 curve.
Humans
What is another word used to describe population distribution?
population dipersion
Calculate the population density where in a field measuring 55km2, you have counted 167,924 sunflowers.
approximately 3,055 sunflowers/km2
What information is displayed on an age structure diagram? (Provide 2 answers)
the amount of males and females in a population
the amount of each age group in a population
Give an example of an organism that is a Type 2.
Birds
Identify the most common type of population distribution, and provide one example.
Clumped; examples may vary.
Miss Yargo measures the classroom and finds it to be 10m in length and 8m in width. The classroom has 20 students. Calculate the population density.
0.25 students/m2
Using the diagram provided, what percentage of the stable population are 20-24 years old?
approximately 8%
Which type of survivorship curve would you expect to see for a population that is unlikely to live beyond a few years old?
Type 3
During the months of autumn, leaves of trees fall and disperse. What type of distribution would you expect for the seeds of these deciduous trees?
Random
A scientist measures a portion of the Amazon rainforest. He calculates 22m for the width and 10m in length. He then counts 16,934 birds in the rainforest. Calculate the population density.
approximately 76 birds/m2
Using the diagram provided, what percentage of the rapidly growing population are 0-4 years old and female?
approximately 9%
Describe the survivorship of organisms in a Type 2 curve.
The number of organisms living to an older age decreases with time, but not as quickly as organisms in Type 3 curves.