13: Competition Flashcards Preview

Ecology > 13: Competition > Flashcards

Flashcards in 13: Competition Deck (32)
Loading flashcards...
1

Focus is on more than one species

community

2

an association of interacting species living in a particular area

community

3

Competition

The struggle among organisms for vital resources (i.e. food, space, mate)

4

Types of Competition

Intraspecific competition & Interspecific competition

5

competition between organisms of different species

interspecific competition

6

competition between organisms of the same species

intraspecific competition

7

6 Types of Interactions that lead to Interspecific Competition

1. Consumption 2. Overgrowth 3. Preemption 4. Territorial 5. Encounter 6. Chemical

8

Consumption and Overgrowth interactions are considered what type of interspecific competition?

exploitative competition

9

Preemption, Territorial, Encounter, and Chemical interactions are considered what type of interspecific competition?

interference competition

10

Four possible outcomes of Interspecific Competition

1. Species 1 wins 2. Species 2 wins 3. Competition can go either way 4. Coexistence

11

Logistic Growth Equation

dN/dt=rN(K-N/K)

12

What equation is used for Intraspecific Competition?

Logisitic growth curve

13

Lokta-Volterra Models

dN1/dt=r1N1(K1-N1-a12N2/K1​)

dN2/dt=r2N2(K2-N2-a21N1/K2​)

14

What equation is used for Interspecific Competition?

Lotka-Volterra Models

15

a12N2 represents what?

the relative level of interspecific competition

16

K1-N1 represents what?

the relative level of intraspecific competition

17

alpha=?

the competition coefficient

18

What determines the outcome of competition?

differences in alpha and N

19

What would the value of a12 have to be if the effect of each individual of species 2 is less than the effect of each individual of species 1?

a12<1

20

What would the value of a12 have to be if the effect of each individual of species 2 is more than the effect of each individual of species 1?

a12>1

21

What must happen for Coexistence to be possible?

interspecific competition is weaker than intraspecific competition

22

Competition Exclusion Principal

two species cannot coexist if they are in the same location and have the same fundamental niche and require the exact same resources

23

Competitive Exclusion Principle: What causes the abundances of the different species to diverge over time?

differences in the competitive ability of the different species

24

Competitive Exclusion Principle: What is meant by "exclusion"?

one species becomes more common while the other bocomes less common (excluded)

25

Competitive Exclusion Principle: What determines the time it takes for one species to be excluded?

the differences in abilities

26

What is Competitive Exclusion the result of?

overlapping niches

27

How do seemingly similar species coexist?

Habitiat/resource partitioning (splitting up the resource "pie")

28

same resource used diffenetly be species in coexistence

Habitat Partitioning

29

use of different resources between species in coexistence

Resource Partitioning

30

Character Displacement

When competition causes shifts in a species morphology, physiology, or behavior