K-selected vs. R-selected species
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24 Terms
Few offspring
k-selected
heavy parental care to protect them
k-selected
humans, kangaroos, whales, & birds (most mammals)
k-selected
usually reproduce multiple times
k-selected
bigger size (tendency)
k-selected
long lifespan
k-selected
long time to sexual maturity = low biotic potential = slow population growth rate
k-selected
more likely to be disrupted by environmental change or invasives
k-selected
many offspring
r-selected
little to no parental care
r-selected
may reproduce only once
r-selected
insects, plants, fish, green crabs, rats, mice
r-selected
short lifespan
r-selected
quick to sexual maturity = high biotic potential = high population growth rate
r-selected
more likely to be invasive
r-selected
better suited for rapidly changing environmental conditions
r-selected
small size
r-selected
survivorship curve
line that shows survival rate of a cohort (group of same aged individuals) in a population from birth to death
Type I
k-selected
rapid decrease in survivorship late in life as old age sets in
k-selected
Type III
r-selected (mostly)
few make it to the middle of their life, even fewer make it to adulthood, slow decline in survivorship in old age
r-selected
Type II
in between
steadily decreasing survivorship throughout life
in between
Note 
Flashcards (20)