Species Strategies
What is a K-selected species?
This survivalship curve shows a low mortality in early and middle & a sharp drop in old age.
What is Type I?
This is the term for the number of individuals a region can support without degrading the environment.
What is carrying capacity?
In this type of growth model, the population grows rapidly without constraints.
What is exponential growth?
This shape of age structure diagram suggests a rapidly growing population.
What is a pyramid shape?
This reproductive strategy is characterized by high numbers of offspring and little to no parental care
What is R-selected Species?
Fish and insects usually exhibit this survivorship curve.
What is Type III?
Aproximate global human population.
What is around 8 billion?
"S-shaped" curve shows population leveling off at carrying capacity.
What is logistic growth?
A column-shaped age diagram indicates this type of population growth.
What is stable growth?
A species that can live and thrive in an area with a wide range of environmental conditions.
What is a generalist species?
This survivorship curve shows a constant death rate across all age groups.
What is Type II?
TFR stands for.
What is Total Fertility Rate?
When a population exceeds the carrying capacity temporarily, it’s called this.
What is overshoot?
If the base of the diagram is narrower than the top, this is likely happening.
What is population decline?
What is a K-selected species?
Explain why amphibians are generally classified under a Type III survivorship curve.
What is high mortality in early life stages due to minimal parental care?
Factor that typically leads to a decrease in TFR.
What is increased education for women, or access to family planning?
The number of individuals added to a population divided by the original population size.
What is growth rate?
In an age structure diagram, a bulge in the reproductive age group suggests this.
What is a population surge?
Two traits of a specialist species and one disadvantage.
What are narrow niches and specific food requirements & disadvantages?
Which type of reproductive strategist is more likely to exhibit a Type III curve, and why?
What is r-selected, because they produce many offspring with low survival rates?
Rate must be around 2.1 for a population to replace itself.
What is the replacement-level fertility?
Name one density-dependent and one density-independent factor that affects population size.
What are disease, competition & natural disasters, and temperature extremes?
Developing country may have a wide base in its age structure diagram.
What is high birth rates due to limited family planning and healthcare?