rocky shore ecosystem II

Question 1

What defines the zonation of the rocky shore environment?

Answer 1

Dessication

wave action

tidal movement

Question 2

What are the four key biological interactions in the rocky shore environment?

Answer 2

1. competition
2. grazing
3. recruitement
4. Predation

Question 3

What controls the upper and lower limits of Chthamalus sp. and Semibalamus sp. and what experiment is the proof for it?

Answer 3

• light
• temperature
• dessiccation

Question 4

Name three concepts that might restrict the destirbution of Ulva lactuca to the lower midlittoral region of the shore and what experimental design can proof these factors?

Answer 4

• Grazing
• Dessication
• Encrusting sp.

Question 5

What effect does removing of predators as on the rocky shore community on the west coast of the USA?

Answer 5

Question 6

What effects do key stome predators have on the environment?

Answer 6

Keystone predators have a disproportionately large effects on their communities relative to their biomass

Question 7

Describe an experiment that shows the predator-grazer interactions on the rocky shore

Answer 7

Question 8

Describe the results of a barnacle survival experiment

Answer 8

Question 9

Draw a diversity-predation intensity curve

Answer 9

Question 10

What determins recovery at the USA west coast rocky shore?

Answer 10

Patch size and larval availability

Question 11

Several alternative stable states can result in ….

Answer 11

Localised distrubances