Population Ecology
This happens to a population as it approaches carrying capacity
Growth slows and eventually stabilizes
Reason that our survivorship curves have moved from more of a type 2 to a type 1 curve.
Access to medical advances
Draw an age structure pyramid that would have a declining population
Pre-reproductive ages is narrower than reproductive
These are the 2 factors used to describe people moving into or out of a population
Immigration and Emigration
The formula to find doubling time is also called the rule of this number
70
The reasons bigger and closer islands have more biodiversity
More resources or niches to support different organisms
The type of survivorship curve is show by high survival throughout the lifespan, with individuals dying off at an old age
Type I
An age structure diagram separates a population by different age groups, but also by this other metric
Gender
The major cause of the exponential increase in world population
Industrialization
These countries are more likely to have a greater impact on the environment, thanks to factors like higher wealth, greater resource consumption, meat heavy diet, and industrial pollution
Developed
Mark-recapture assumes
Net immigration/emigration is zero
Marks do not harm or make it easier to capture
The resource in the ecosystem that is too low to allow further population growth is called this.
Limiting Resource
A developing country would be expressed as this type of shape on the age structure diagram
Pyramid
The following equation is used to calculate this:
(CBR + Imm) - (CDR + Em)/10
Population Growth
These factors often lead to decreasing birth rates in developing countries
Education of women; economic/job opportunities for women, increased access to healthcare
The type of species often overshoots its carrying capacity, then population rapidly declines to fall back under it
r-selected
Sea turtles lay hundreds of eggs at once, then leave the eggs to hatch and fend for themselves. This behavior matches best with this survivorship type.
Type III
Population graphs that show an S-shaped curve are this type of growth model.
Logistic
The theory of Malthus predicted that
This statistic is the Total Fertility Rate required to compensate for the amount of the population that dies each year. Globally, it is about 2.1.
Replacement Fertility Rate
50 butterflies were captured and marked. On the second day, 33 butterflies were captured; 12 of them were marked. The population estimate from this data is.
137 or 138.
Type of curve that K-selected species follow
Type I
An age structure diagram with in the shape of a column suggests that this is happening in the population.
The 3 factors are used to determine a country's impact on the environment
Population, Affluence, and Technology
What is the doubling time of a population that has a 5 percent growth rate
14