Understanding Ecological Succession and Its Impacts

 
ECOLOGICAL SUCCESSION
Obj: 11D
 
Describe how events and
processes that occur during
ecological succession can change
populations and species diversity
.
 
What is ecological succession?
 
orderly process of change in an
ecosystem brought about by the
progressive replacement of one
community by another until a
stable climax is established
 
What
differences
do you see
in these
pictures?
 
Tornados
Hurricanes
Forest fires
Volcanoes
Floods
 
What disasters could affect the plant
population?
 
 
 
Climax Community
 
The ideal end community in any
given ecosystem
 
https://ww
w.youtube.
com/watch
?v=iZA5yfr
zLV8&feat
ure=player
_embedde
d
 
Primary Succession
 
Occurs on bare rock or hardened lava
on which no soil organisms exist
Beings with arrival of lichens, a
pioneer species
 
Pioneer Species
 
Able to grow on barren rock
First organisms to grow during
primary succession
Ex: lichens, mosses
 
 
 
Secondary Succession
 
Occurs after an event in which the
ecosystem is damaged, but not
destroyed.
Because soil remains, secondary
succession is faster than primary
succession
On Hwy 31 going to Kilgore…
 
 
 
 
 
How long is the time?
 
 
 
https://www.youtube.com/watch?feature=pla
yer_embedded&v=4RsMyVavT2Q
 
Succession also in bodies of water
 
 
large deep
lakes
 
shallow ponds
 
 
grassland
 
How does succession affect
population size?
 
Forest fire or volcanic eruption will
decrease population and diversity
If the soil is intact, over time, the
populations will recover
Ex: insects deposit eggs in the soil &
these eggs can survive and hatch
after a fire
 
 
 
Animals that survived may move to other
regions which reduced competition for other
species
Can lead to entirely new ecosystems if new
herbivores move in where there were once
none.
Eventually carnivores will move in to eat new
herbivores.
 
How does succession affect
population diversity?
 
How do population and species
diversity change as succession
progresses?
 
Population size and species diversity
both increase during ecological
succession
Over time, more species are able to
survive and become established
 
Smaller producers are replaced by
larger ones, such as small trees and
shrubs
As insects increase, birds and other
animals that eat insects arrive
Eventually a climax community will
build again
 
 
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Ecological succession is the orderly process of change in an ecosystem, where one community replaces another until a stable climax is reached. This progression affects populations and species diversity. The process involves primary and secondary succession, with events like tornadoes, hurricanes, and forest fires impacting the plant population. The ideal end of succession is the climax community. Explore the differences in pictures and learn about pioneer species that initiate succession.


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

  2. What is ecological succession? orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established

  3. What differences do you see in these pictures?

  4. What disasters could affect the plant population? Tornados Hurricanes Forest fires Volcanoes Floods

  5. Climax Community The ideal end community in any given ecosystem https://ww w.youtube. com/watch ?v=iZA5yfr zLV8&feat ure=player _embedde d

  6. Primary Succession Occurs on bare rock or hardened lava on which no soil organisms exist Beings with arrival of lichens, a pioneer species

  7. Pioneer Species Able to grow on barren rock First organisms to grow during primary succession Ex: lichens, mosses

  8. One of our photographs from our travels in 2010

  9. Secondary Succession Occurs after an event in which the ecosystem is damaged, but not destroyed. Because soil remains, secondary succession is faster than primary succession

  10. On Hwy 31 going to Kilgore

  11. How long is the time?

  12. https://www.youtube.com/watch?feature=pla yer_embedded&v=4RsMyVavT2Q

  13. Succession also in bodies of water

  14. large deep lakes shallow ponds grassland

  15. How does succession affect population size? Forest fire or volcanic eruption will decrease population and diversity If the soil is intact, over time, the populations will recover Ex: insects deposit eggs in the soil & these eggs can survive and hatch after a fire

  16. How does succession affect population diversity? Animals that survived may move to other regions which reduced competition for other species Can lead to entirely new ecosystems if new herbivores move in where there were once none. Eventually carnivores will move in to eat new herbivores.

  17. How do population and species diversity change as succession progresses? Population size and species diversity both increase during ecological succession Over time, more species are able to survive and become established

  18. Smaller producers are replaced by larger ones, such as small trees and shrubs As insects increase, birds and other animals that eat insects arrive Eventually a climax community will build again

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