Population Growth
Survivorship Curves
Growth Curves
Affects?
Carrying Capacity
100
What is the term used for populations moving into an area?
What is immigration?
100
What does the x-axis on the graph represent?
The x-axis on the graph represents the time period.
100
During what phase of the growth curves is the population just beginning to colonize an area?
During the lag phase
100
In 1927, the human life expectancy was 39 years and child survival was 68%. By 1960, life expectancy jumped to 52 years and child survival to 82%. What advancement likely caused this?
Antibiotics
100
What term is used to describe the steady population that the environment can sustain in diagram B?
Carrying Capacity.
200
What is the term used for populations leaving an area?
What is emigration?
200
Which type of organism shows a steady decline at all life stages?
Type 2 which is rodents which has a steady decline on all life stages.
200
In which graph does the population growth appear to continue unchecked?
Graph A
200
Insects eating your tomato plants is an example of what factor?
density-independent
200
Which events drastically increased Earth’s Human Carrying Capacity?
Vaccines, indoor plumbing, and crop rotation
300
What two factors cause cause an increase in the population size?
What is Birth and Immigration?
300
Which type of organism loses most of their individuals at an early life stage?
Type 2 Which has Fish, insects, and amphibians.
300
How is this type of growth described?
This type of growth is described exponentially
300
Predation of deer by wolves is an example of a?
density-dependent factor
300
Is this true: Emergence of ecological diseases is typically associated with human-made changes that upset normal ecological relationships?
True
400
Name two factors that cause a decrease in population size.
What is death and emigration?
400
What survivor type are humans?
Humans are survivor type 1.
400
These types of growth curves are often referred to using the letter of the alphabet that they resemble. The logistic growth curve is sometimes referred to as an S- curve. What letter would you use to describe the exponential growth curve?
For Graph A I would describe it as a J.
For Graph B I would describe it as a M.
400
For a lady bug population at the beginning of summer, the food supply and habitat are almost limitless. If there are 1,000 lady bugs in a one-acre field, the per capita rate of increase is 25%, and no immigration or emigration occurs, how many individuals will be added in the next generation?
250
400
Food aid policies of rich nations can exacerbate famine and hunger problems in poor nations because:
the local farmers of the poor nation are forced out of business by the free or cheap food and the economy cannot stabilize properly.
500
A population with a large fraction of post-reproductive individuals is common in __________-developed countries; this population will most likely __________ in size.
What is more; decrease?
500
Which of the three groups/types have the highest number of individuals that reach reproductive age?
Type 1 which is humans.
500
In diagram B what causes the population growth to slow down?
The pressure from the environmental Resistance.
500
If a deer herd has a population of N = 1,000, and a per capita rate of increase of 10% (r = 0.1 per year), how much will the deer population grow in a year, if resources are unlimited?
100
500
Is this true: The government of China offers financial incentives to encourage citizens to have children?
False