Lecture 12

Question 1

3 Concepts of Competition

Answer 1

1. Competition can be direct or indirect, vary in intensity, and occur between similar or dissimilar species
2. Competing species are more likely to coexist when they use resources differently
3. The outcome of competition can be altered by the physical environment, disturbance, and predation

Question 2

1. Competition can be direct or indirect, vary in intensity, and occur between similar or dissimilar species

Answer 2

a. species may compete directly or indirectly
b. competition can vary in intensity
c. competition is often asymmetrical
d. competition can occur between closely or distantly related species

Question 3

Concept 14.2

Answer 3

• Competing species are more likely to coexist when they use resources in different ways.
• In the 1930s, G. F. Gause did competition experiments with Paramecium

Question 4

Character Displacement

Answer 4

• competition causes the phenotypes of competing species to evolve to become different over time, facilitating resource partitioning

Question 5

Concept 14.4

Answer 5

• The outcome of competition can be altered by the physical environment, disturbance, and predation

Question 6

Life Cycle of Nauplius

Answer 6

Pelagic (Planktonic)
1. Nauplius
2. Cyprid
Benthic
1. Juvenile
2. Adult