1.Community Structure and Dynamics

2. Trophicstructure

Feeding () relationship between organisms.

>Biomass: Primary producers

3. Food web

Mention the organisms in each trophic level. Explain.

Primary Producers.

Primary Consumers.

Secondary Consumers.

Tertiary Consumers.

Quaternary Consumers .

4. Bottom-up and Top down regulation model

V= vegetationH= herbivore

VH

VH

VH

Explain each possible interaction with your own words. 5. Bottom up model

N = mineral nutrients.

P = predators

NVHP

Top down model

N = mineral nutrients.

P = predators

NVHP

Find out 2 similarities and 2 differences between the two models. 6. Ecological Succession

The sequence of community changes after a disturbance.

7. Primary Succession 8. Secondary Succession 9.

Mention two differences and two similarities between primary and secondary succession.

Describe the relationship between nitrogen in soil and mineral nitrogen (50 w).

10. Humans bottom up or top down control

Introduction (50w)

Bottom up support (50w)

Top down support (50w)

Conclusion (50w)