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)
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 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