Exam 1 Flashcards
What is the central assumption of the exponential growth model?
That resources are unlimited
This diagram represents the life histories of three typical organisms (Type I, II, and III). Type I organisms generally have
Large, long-lived offspring
Your summer job is to map nesting birds in a swamp. Here is the map of bird nests:
What is the name of this type of pattern?
Uniform
During logistic population growth, at what percentage of the carrying capacity do we see maximum population growth ?
50%
What term best describes the scientific study pictured below
Field experiment
Which best describes the hypothesis being tested above?
Mice, their predators, and mouse replicas on the beach and inland
The difference between the exponential growth model and the logistic growth model is the addition of which variable?
Carrying Capacity
Algal growth in freshwater systems is usually enhanced by
excess phosphorus
An example of an organism with a Type 3 survivorship curve is
Oysters
In Yellowstone Park, wolves were reintroduced and reduced the elk population. This allowed for an increase in production and plant growth. This is an example of
top-down control of the food pyramid
What do we mean by population density?
Number of individuals of one species per unit area or volume
What happened to the pheasant population introduced to Protection Island in the 20th century?
It grew nearly exponentially and was hunted to extinction by the US military.
You have inherited an empty fish farm and are building up stocks of Tilapia for the domestic market. Assume that food, space and all other resources are unlimited. Given these assumptions, what form of population growth do you anticipate?
Exponential
What mechanism would cause a clumped distribution of plants on the landscape (check all answers that apply)
Growth next to an important resource
Poor seed dispersal
Under what circumstances might you expect to see something like exponential growth in a population?
Following a significant drop in population
In a newly invaded habitat
