Biotic and Abiotic Biotic and Abiotic FactorsFactorsSC.912.L.17.7SC.912.L.17.7

What is an ecosystem?What is an ecosystem?

The biosphere is the The biosphere is the part of the Earth that part of the Earth that contains all the living contains all the living things on the planet. things on the planet.

Each ecosystem that Each ecosystem that we study is a part of we study is a part of the biosphere. the biosphere.

A system is a group A system is a group of things that interact of things that interact with one another. with one another.

What are biotic factors?What are biotic factors?

The organisms that The organisms that make up the living part make up the living part of an ecosystem are of an ecosystem are called biotic factors. called biotic factors.

An organism depends An organism depends on other biotic factors on other biotic factors for food, shelter, for food, shelter, protection, and protection, and reproduction. reproduction.

What are abiotic factors?What are abiotic factors?

Nonliving things that we find in an Nonliving things that we find in an ecosystem are called abiotic factors. ecosystem are called abiotic factors.

Abiotic factors have an effect on the type Abiotic factors have an effect on the type and number of organisms living in an and number of organisms living in an ecosystem. ecosystem.

Some abiotic factors include soil, water, Some abiotic factors include soil, water, temperature, and sunlight.temperature, and sunlight.

Ecosystems

do not necessarily have clear do not necessarily have clear boundaries due to biotic and abiotic boundaries due to biotic and abiotic

changeschanges can change daily as things move from can change daily as things move from

one ecosystem to anotherone ecosystem to another

Biotic:Biotic: migration, seed dispersal migration, seed dispersalAbioticAbiotic: flood, erosion, drought: flood, erosion, drought

Aquatic EcosystemsAquatic Ecosystems

Abioitc: Abioitc: Temperature, pH, Salinity, sunlight Temperature, pH, Salinity, sunlight

Biotic: Fish, insects, submerged plants,phytoplanktonBiotic: Fish, insects, submerged plants,phytoplankton

Terrestrial EcosystemsTerrestrial Ecosystems

Biotic: all plants and animals!!Biotic: all plants and animals!! Abiotic: temperature, pH of soil, sunlight Abiotic: temperature, pH of soil, sunlight

availability, precipitation, humidity availability, precipitation, humidity (availability of water)(availability of water)