5.2 Biotic and abiotic factors

Abiotic factors

Non-living factors which affect the distribution of organisms in a habitat

List 4 biotic factors

-food availability

-new predators

-new pathogens

-competition

List 7 abiotic factors

-light intensity

-temperature

-humidity

-soil pH

-O2/CO2 conc

-wind

-salinity

Biotic factors

Living factors which affect the distribution of organisms in a habitat

What is used to measure light intensity?

Luxmeter

What is the unit for light intensity?

Lux/kilolux

What is used to measure air temperature?

Thermometer

What is the unit for air temperature?

Degrees celcius

What is used to measure air humidity?

Whirling hygrometer

Unit for air humidity

%

What is used to measure wind speed?

Anemometer

What is the unit for wind speed?

m/s

What is used to measure slope angle?

Clinometer

What is the unit for slope angle?

Degrees

What is used to measure aspect?

Compass

What is the unit for aspect?

Degrees

What is used to measure dissolved oxygen in water?

Oxygen probe

What is the unit for dissolved oxygen in water?

%mg/L or ppm

What is used to measure soil pH?

Universal indicator

What is used to measure soil temperature?

Temperature probe

What is used to measure soil temperature?

Penetrometer

Unit for soil temperature

psi