habitat and niche. individuals population growth species primary secondary succession interactions...

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.