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.