lecture 23

Question 1

competition

Answer 1

use or defense of a limiting resource by an individual that decreases resource availability to others

Question 2

interspecific competition

Answer 2

between species

Question 3

intraspecific competition

Answer 3

within a species

Question 4

resources

Answer 4

factors used by an organism and affects pop growth rates

Question 5

can 2 species that use resources exactly the same way coexist?

Answer 5

no because a species will extinct because of resource competition

Question 6

gause principal is also called

Answer 6

competitive exclusion principal

Question 7

competitive exclusion principal

Answer 7

two species cannot coexist in definitely on the same limiting resources, one species will die out

Question 8

joseph grinnel idea of niche

Answer 8

the sum of the HABITAT requirement needed for a species survival and reproduction

Question 9

charles elton idea of niche

Answer 9

the ROLE a species plays in a community

Question 10

evelyn hutchinion idea of niche

Answer 10

combined these ideas

Question 11

multidimensional hypervolume

Answer 11

allows a species to practice its way of life

Question 12

dimension

Answer 12

environmental conditions/resources

Question 13

fundamental niche

Answer 13

in the ABSENCE of biotic interactions like other species, this is where its capable of growing

Question 14

realized niche

Answer 14

in the PRESCENCE of biotic interaction where it tends to grow with the other species present

Question 15

two competitions can coexist but at

Answer 15

lower population densities

Question 16

what are two ways species can minimize competition

Answer 16

partitioning resources and having a stronger competitor vs weaker competitor and predator-mediated coexistence

Question 17

resource partitioning can cause

Answer 17

intraspecific competition to be greater than interspecific competition

Question 18

two competitors will coexist when

Answer 18

the intraspecific competition is greater than the interspecific competition

Question 19

rarity advantage

Answer 19

under these conditions a species gains a growth advantage, one species is at a low density and its competition is at a high density

Question 20

the two outcomes of competition

Answer 20

1. one competitor drives the other to extinction 2. both species coexist but at lower population densities, negative interaction

Question 21

outcomes of other interspecific interactions

Answer 21

per capita growth rate of at least one species is modified and the avg pop density of at least one species differs

Question 22

intraspecific competition causing evolution

Answer 22

goldilocks principal

Question 23

goldilocks principal

Answer 23

individuals with optimal beak size will leave the most offspring, k will increase as birds that convert seeds into offspring come to pre dominate the pop

Question 24

interspecific competition causing evolution

Answer 24

finches and insects presence, when bees are absent, finches are smaller and spend more time drinking nectar than when bees are absent

Question 25

consumer resource interactions

Answer 25

leads to evolutionary arms race as prey continually evolve better defenses and predators continually evolve better offenses (red queen hypothesis)