ECOLOGICAL SUCCESSION

SUCCESSION

11D: Describe how events and processes that occur during ecological succession can change populations and species diversity.

(I can describe the process of succession and explain how events can change populations and species diversity)

EXPLAIN WHAT IS HAPPENING IN THIS PICTURE. BE AS DESCRIPTIVE AS POSSIBLE.

SKETCH HOW WILL THIS LANDSCAPE IF LEFT ALONE WILL *CHANGE* OVER 50 YEARS?

1 yr 5 yrs 30 yrs 50 yrs

CLASS DISCUSSION

Which do you predict will take longer to turn into an environment that can sustain large life?

Why would that one be the one that will take longer?

http://www.youtube.com/watch?v=AWwe0udewD8

SUCCESSION

1. Any change in a plant communities over time is called a(n)_________________

2. A slow and gradual change (succession) in an area that once was nothing but rock is_________

3. A relatively quick gradual change (succession) in an area after a natural disaster has destroyed an area is ___________

4. The final stable state of a succession is called the _______________

5. The first organism in a succession is called that _____________

6. A common pioneer organism in primary succession is the _____________

WHICH ONE SHOWS PRIMARY SUCCESSION

AND WHY?Not

water!!... It’s

hardened volcano

lava

WHICH ONE SHOWS SECONDARY

SUCCESSION AND WHY?

Put these organisms in order that you think would move in and establish an area

1st

2nd

3rd

4th

5th

6th

7th

8th

9th

grass

trees

ants

lizard

wormsfoxes

crickets

mice

EXIT QUESTIONS 1 & 2

EXIT QUESTION 3

The diagram above illustrates a. primary succession

b. secondary succession c. an ecological pyramid d. overproduction

EXIT QUESTION 4THE DIAGRAM BELOW SHOWS VARIOUS ECOLOGICAL COMMUNITIES THAT OCCUPIED AN AREA OVER A PERIOD OF 300 YEARS.

Which statement best describes the diagram?a. Community A is the most stable community.b. C developed into community A after a period of 75 years.c. Community C replaced community B after a period of about 50 years.d. Community D modified the environment, making it more suitable for community E.

EXIT QUESTION 5The final stage of ecological succession is characterized by the presence of the climax community, the oak-hickory forest. Figure 3 depicts the gradual change from pine to hardwoods.

1.According to the information in Figure 3, a 150-year-old climax community would contain oak and hickory trees with a density of approximately:

A. 3,000 trees per unit area. B. 5,000 trees per unit area. C. 15,000 trees per unit area. D. 20,000 trees per unit area