APES Topics 3.2/3.3

Flashcards covering K-selected and r-selected species, biotic potential, invasive species, and survivorship curves.

K-Selected Species

Species with few offspring, heavy parental care, reproduce many times, and have a long lifespan.

r-Selected Species

Species with many offspring, little to no care, may reproduce only once, and have a shorter lifespan.

Characteristics of K-Selected Species

Expend energy for offspring, low competition for resources, live in stable environments, more vulnerable to disruptions, larger in size.

Characteristics of r-Selected Species

Minimal energy for offspring, more competition for resources, live in unstable environments, more likely to be invasive, smaller in size.

Biotic Potential

The maximum reproductive rate of a population in ideal conditions.

K-Selected Species and Invasive Species

A species that is more likely to be affected by an invasive species.

r-Selected Species and Invasive Species

A species that is more likely to be an invasive species.

Survivorship Curve

A line that shows survival rates of a cohort (group of same-aged individuals) in a population from birth to death.

Type I Survivorship Curve (K-selected)

High survivorship in early life due to high parental care, high survivorship in mid-life, rapid decrease in survivorship at old age.

Type II Survivorship Curve

Steadily decreasing survivorship throughout life.

Type III Survivorship Curve (r-selected)

High mortality early in life due to little to no parental care; few make it to midlife; even fewer make it to adulthood.