Biology Final Review - Limiting Factors to Growth

Density Dependant Limiting factors

• affects all population regardless of size and density, due to extreme weather

• occurs when the population density reaches a certain level

Examples of Density Dependant Limiting factors

• predadtion

• Competition

• Parasitism and disease

• stress from over crowding

• herbivory

Density independent limiting factors

• affects all population regardless of size and density, due to extreme weathers

• occurs when population density reaches a certain level

micro habitat

• no 2 species can occupy same niche

• small part of larger habitat were organisms live

• where organisms live, role they play

• organisms use same reasources

where organisms lives, what role they play in the ecosystem, food it eats, way it obtains food, where and how it produces

• competition

• symbiosis

• niche

• microhabitat

organisms use same resources

• dividing reasources

• competitive exclusive principle

• competitions

• pred and prey relationships

Competitive exclusion principle

• herbivores effect size and distribution

• no 2 species can occupy the same niche in the same habitat at the same time

• species alter their use of the niche to avoid competition by dividing resources among them

• organisms use same reasources

Species alter their use of the niche to avoid competition and dividing reasources among them

• keystone speicees

• dividing resources

• predator prey relationships

• competitive exclusion principle

maintain structure, stability and diversity in an ecosystem, if elimited, ecosystem breaks down

• competitive exclusion principle

• keystone species

• predator prey relationships

• dividing reasources

symbiosis

• 2 species evolve different from geographic isolation

• relationship between 2 species

• organisms use same reasources

• maintain structure and stability