Download ECOLOGICAL SUCCESSION

• 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?
• Ecological Succession
– Primary
– Secondary
• 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)
• Big changes can now take place because the
presence of soil has opened up a new world.
• 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.
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 don’t 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 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
• CLIMAX COMMUNITY – a community
that does not undergo further
succession (stable and diverse)
• 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
don’t need to form soil
• Yellowstone Fire
Secondary Succession
Primary Succession
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.
Primary Succession:
1.
____________________
2.
Soil formation
3.
Grasses and small plants grow from seeds
brought in by __________________________
4.
_________________ because they don’t
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)
Secondary Succession:
•
•
Community has been cleared by a disturbance
that ___________________________________
–
_________________
–
Storms
–
_________________
Same series as primary succession, but it goes
_____________ because you don’t need to
form soil