Lec 19- Resource competition

Question 1

How does competition influence population dynamics?

Question 2

Trophic interactions - examples

Answer 2

the feeding of another organism

ex. pollination, parasitism, herbivory

Question 3

reproductive interactions

Answer 3

relationships that are about reproduction

Question 4

habitat-related interactions

Answer 4

relationships that are about species creating habitat

Question 5

the two kinds of competition and their definitions

Answer 5

-intraspecific comp: between individuals of the same species

-interspecific competition: between individuals of different species

Question 6

resource limitation leads to two things?

Answer 6

interference competition: direct aggressive interaction between individuals. Exhibited by both animals and plants, but most common in animals

Exploitative competition: competition to secure resources first. Exhibited by both animals and plants but is most common in plants.

Question 7

competitive exclusion principle/ Gaus’s Law

Answer 7

two species with the same niche cannot co-exist indefinitely, stable coexistence rarely occurs. More likely than not, species will occupy different realized niches

Question 8

when does competitive exclusion NOT occur?

Answer 8

When disease and predation are the main limiting factors.

in extreme or highly variable environments. (like deserts, lakes)

Question 9

Character Displacement

Answer 9

Changes in the characteristics of a species’ population as a consequence of natural selection for reduced competition in regions where species can co-occur.