Transcript Environmental Succession

Environmental Succession
The sequential change to an
ecosystem
Pioneer Species
 Organisms that move into a environment
that has no life
 Change the environment
 Allow for other organisms to move in
 Example Lichens on rock
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Early successional species
 Move into the changed environment
 Are better able to compete than the pioneer
species
 Grow close to the ground
 Add nutrients to the soil.
 Grasses and bean plants
Midsuccessional Species
 High grasses or shrubs
 Must have deep soil
 Provide shade for late sucessional species
Late Successioal Species
 Relatively stable environments
 Dominated by Slow growing trees
 Have high levels of diversity.
 Oldest are called Terminal forests/Old
growth forests
Primary Succession
 Life process begins for the first time
– Volcano forming an island
Secondary succession
 The elimination of all life in an area by
catastrophe.
– Life comes back….
K strategists (kin) Family
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Polygamy
Monogamy
-Live longer-prepare off spring for survival
-Not every one copulates-very selective
Sexual selection-Females look for a trait
Learned traits
Polygamy-many partners
Or Monogamy-one partner
R strategists (Rapid) No family-lots of kids…..
Nonselective sex
Survival is luck
More primitive
Instinctive
Polygamy non selective
Shorter lives exc-
R strategists
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(Rapid) No family-lots of kids…..
Nonselective sex
Survival is luck
More primitive
Instinctive
Polygamy non selective
Shorter lives exc-