Bio 115 Ecology and Evolution

Community Ecology:

Competition.

Georgy Framtsevich Gause (1910-1986)

Corolla length of the flowers visited by bumble bees (Bombus sp.)

Bees with the same proboscis length occur at different altitudes.

THE END.

Q2. Why is interference competition dependent on resource abundance?

Q2. How many species are there in an (ecological niche)? Why?

Q1. What form of competition is most intense?

Q2. Two species can share a habitat if:a: b:

Q3. What relationships are mutualistic?

Q5. Why are the piggy-back ants present on the leaf fragments?

Q5. (a) SD and SE are measures of _______

Q5. (b) Express the SE in function of the variance:

SE = Variance

Q1. What did Thomas Park demonstrate using work with Tribolium (flour beetle) species?

Q2. What did A.C. Crombie’s work (using Oryzaephilus and Tribolium) suggest about survival in the environment?

Q3. Single trees of the tropical rainforest are heavily infested by a large number of leaf-eating insects. List three reasons.

Q4. Why can the Lappet-faced, Ruppell’s, and Egyptian vultures feed on the same carcass?

Q5. How do you summarize: 22, 21, 23, 25, 22, 33, 24, 20, 22, 21, 25, and 25?

Q1. What two phenomena are illustrated by the observations on the slide?

Q2. What does the following graph tell you about the ants and rodents of the southern desert?

Q3. Based on the results of the table what is the symbiosis between ants and rodents in the sonoran desert?

Q4. If the Lodge pole ground squirrel aggressively removes the Alpine ground squirrel from the lodge pole forest then

for the Alpine ground squirrel:fundamental niche realized niche,

for the Lodge pole squirrel:fundamental niche realized niche

(Fill in: < or > or =)

Q5. What is the relationship between Milkweed and Monarch butterfly?

Milkweed Monarch

A 0 0

B 0 +C + +D - -E - +

Positive, negative, or no effect on population size of symbiosis.

Q3. What is the function of the yellow dots at the base of the Passion flower leaves?