Unit 1: K and R Selected Species and Survivorship Curves Flashcards
K-selected size
Large
K-selected number of offspring
Few
K-selected parental care
Present
K-selected lifespan
Long
K-selected number of reproductive events
Few
K-selected competition
High ability
K-selected examples
Elephants, humans
K-selected impact on ecosystem
Can’t overtake and ecosystem
K-selected as an invasive species
Not invasive
R-selected number of offspirng
Many
R-selected size
Small
R-selected parental care
Absent
R-selected lifespan
Short
R-selected number of reproductive events
Many
R-selected competition
Low ability
R-selected examples
House mice, some insects
R-selected impact on an ecosystem
Can overtake and ecosystem
R-selected as an invasive species
Invasive
Type I survivorship curve
High survival until large groups die from old age. K-Selected.
Type II survivorship curve
Constant decline throughout lifespan. R-selected.
Type III survivorship curve
High death rate for young organisms, but organisms that make it to an older age survive.
