Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
Individuals occupying a given area at a given time are considered to constitute a population if they also belong to the same ____
|
Species
|
|
Average number of individuals of the same species per unit of the total surface area at a given time is _____
|
Population crude density
|
|
The most popular type of population distributions is ____
|
Clumped
|
|
Uniform distribution of human habitats is likely the result of ____ whereas habitats of other animals are likely due to _____
|
community planning, competition
|
|
What determines population size?
|
deaths
births immigration emigration |
|
Explain zero population growth
|
When deaths, births, emigration, and immigration cancel each other out
|
|
G = rm N results in a _____ curve when graphed
|
J-Shape
|
|
A population of tigers is most likely to have what type of survivorship curve?
|
Type - 1
|
|
in G = rmN, if r = 0 , what will happen to the growth rate
|
It will become negative
|
|
____ limits populations
|
Carrying capacity
|
|
The maximum number of individuals of a species that a given environment can sustain indefinitely is known as _____
|
Carrying capacity
|
|
When does a J-shape curve become and S-shape curve?
|
When the species reaches its carrying capacity
|
|
Feedback mechanisms that operate whenever populations change in size are known as ______
|
Density Dependent factors
|
|
A flood is a density- ______ factor
|
Independent
|
|
Temperature is a density-____ factor
|
Independent
|
|
Organisms that demonstrate a type-1 survivorship curve have a ___ - r, and ______ offspring.
|
low-r
large offspring |
|
What does r represent in G = rm N?
|
Rate of natural increase (net reproduction per individual per year)
(high r for indiv. that reproduce often) |
|
A Type ___ survivorship curve has a high mortality early in life
|
III
|
|
A Type ___ survivorship curve has a constant rate of mortality at all ages
|
II
|
|
A Type ____ survivorship curve has a low rate of mortality early in life
|
I
|