APES Survivorship Curves

An r-selected species characteristically has

• a type I survivorship curve
• few offspring
• a population near carrying capacity
• a fast population growth rate

Tracks organisms that tend to live long lives (low death rate and high survivorship rate); toward the end of their life expectancies, however, there is a dramatic increase in the death rate.

• Type I

• Type II

• Type III

• Type IV

Describes organisms with a high death rate (or low survivorship rate) immediately following birth. Examples include bacteria, fishes, and invertebrates.

• Type I

• Type II

• Type III

• Type IV

These organisms typically live in unstable, unpredictable environments & are able to reproduce rapidly (exponentially). They do not take care of their young & are subject to predation.

• k-strategist

• r-strategist

• m-strategist

• s-strategist

These organisms occupy stable environments, are larger in size and have longer life expectancies. They produce, during their life spans, fewer offspring, but place a greater investment in each.

• k-strategist

• r-strategist

• m-strategist

• s-strategist

Tags

NGSS.HS-LS2-6

To measure population density, you must divide the number of individuals living in a defined space by the

• area of the space
• birth and death rates
• carrying capacity
• height of the space

A species described as r-strategist would definitely NOT have which of the following characteristics?

• clumped population pattern
• much parenting
• many offspring
• random population pattern

Refer to the diagram of the survivorship curve.
Which curve best describes an organism that invests a lot of energy in parenting?

• A
• B
• C
• this is not a survivorship curve

Tags

NGSS.MS-LS4-4

Which kind of dispersion is shown in #1?

• clumped
• random
• uniform
• segregated

Which kind of dispersion is shown in #3?

• clumped
• random
• uniform
• segregated