Describe the changes you saw. What plants were first to arrive
on the scene? Will the area look like it originally did? How long
will it take to change?
Slide 3
Ecological Succession Primary Secondary
Slide 4
HINT: Tiny, mostly microscopic, and they secrete enzymes to
break down rock These are Pioneer Species first organisms to
colonize an area Bacteria, fungus, and lichens (algae and
fungus)
Slide 5
Big changes can now take place because the presence of soil has
opened up a new world.
Slide 6
Different species or organisms living in the same habitat
utilize the same limited resources (food, space, water, light,
oxygen, and minerals). The organism better adapted for the
environment will take over the area.
Slide 7
1.Barren rock 2.Soil formation 3.Grasses and small plants grow
from seeds brought in by animals or wind 4.Lichens die because they
dont receive enough light. 5.Grass community survives for many
generations, makes soil deeper and more fertile.
Slide 8
6.Non-woody plants (shrubs) with deep roots crowd out grasses
7.Grasses and shrubs are not stable because they are not diverse
8.Pine trees with shallow roots invade and crowd out shrubs 9.Broad
leaf trees take root and replace pine trees
Slide 9
CLIMAX COMMUNITY a community that does not undergo further
succession (stable and diverse)
Slide 10
Slide 11
Community has been cleared by a disturbance that does not
destroy the soil Fires Storms Human Activity Same series as primary
succession, but it goes quicker because you dont need to form
soil
Slide 12
Yellowstone Fire
Slide 13
Slide 14
Ecological Succession Notes 1. Ecological succession -
_____________ __________________________________ Primary Succession
Secondary Succession 2. Pioneer species - _________________
__________________________________ Examples include:
___________________ 3. Bacteria, fungus, & lichens break down
rocks to make ______. 4. Succession occurs because of ____________.
5. The organism _________ adapted for the environment will take
over the area.
Slide 15
Primary Succession Primary Succession: 1.____________________
2.Soil formation 3.Grasses and small plants grow from seeds brought
in by __________________________ 4._________________ because they
dont receive enough light. 5.Grass community survives for many
generations, makes soil deeper and more fertile. 6.Non-woody plants
(shrubs) with deep roots crowd out grasses 7.Grasses and shrubs are
_________________ because they are not diverse 8.Pine trees with
shallow roots invade and ____________________________________
9.Broad leaf trees _________________ and replace pine trees
10._____________________________ a community that does not undergo
further succession (stable and diverse)
Slide 16
Secondary Succession Secondary Succession: Community has been
cleared by a disturbance that ___________________________________
_________________ Storms _________________ Same series as primary
succession, but it goes _____________ because you dont need to form
soil