Individuals
Population
Growth
Species
Primary
Secondary
SuccessionInteractions
Density
Distribution
Habitat
NicheDensity
Where an animal lives All abiotic and biotic factors
INCLUDES: Food it eats
Abiotic factors
Behavior
Same habitat and similar Niche
Competitive exclusion- 2 species compete the one better suited will push the other out or to extinction.
Niche partitioning= 2 squirrel species naturally divided resources based on competitive advantage.
Evolutionary response= 2 species could have experienced divergent evolution resulting in different teeth size.
Both outcomes allow coexistence.
Competition: 2 organisms fight for the same limited resources.
Interspecific-competition between different species. Eg. lawn different weeds.
Intraspecific-competition between members of same species. Eg. Birds in breeding season, males tolerate birds of different species in territory.
One organism captures and feeds on another organism. Eg. Snakes.
3 Main types: Mutualism- interspecies interaction where
both organisms benefit from relationship. Commensalism- relationship between 2
organisms in which one receives an ecological benefit.
Parasitism- relationship where one species directly harms the other.
# of individuals
area
3 Types:
Clumped Uniform Random
Diagram of surviving members over time from measured births.
Immigration-into from another population Emigration-out of and into another pop. Exponential growth:
Limited resources most have this type. Period of slow growth Brief exponential Levels of when stable=Also called Carrying Capacity
Population Crash- sudden decline, rapidly.
Limiting factor- factor with greatest effect in keeping population size down.
2 Types: Density-dependent Density- independent
Density-Dependent
Competition Predation Parasitism or
Disease
Unusual Weather
Natural Disasters
Human Activities
Sequence of biotic changes that regenerate damaged communities or
in a previously uninhabited area
Primary- development of uninhabited area.
Reestablishment of damaged ecosystem with soil intact.
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