Lesson 6.1 Defining BiomesLesson 6.1 Defining Biomes

Fossil evidence suggests that the frozen continent of Antarctica was once covered in temperate forest.Fossil evidence suggests that the frozen continent of Antarctica was once covered in temperate forest.

Earth’s Major BiomesEarth’s Major Biomes• Groups of terrestrial

ecosystems that share biotic and abiotic conditions

• 10 primary biomes:• tropical rain forest • dry forest savanna• desert • temperate rain forest• temperate forest• temperate grassland• chaparral• boreal forest• tundra

• Groups of terrestrial ecosystems that share biotic and abiotic conditions

• 10 primary biomes:• tropical rain forest • dry forest savanna• desert • temperate rain forest• temperate forest• temperate grassland• chaparral• boreal forest• tundra Did You Know? Taiga is another

name for boreal forest.

Lesson 6.1 Defining Biomes

Terrestrial BiomesTerrestrial Biomes

The Major BiomesThe Major Biomes• What abiotic and biotic factors characterize

biomes?• Have similar vegetation patterns• Correlated with temp. and rainfall

Lesson 6.1 Defining Biomes

How Do Organisms Use Energy?How Do Organisms Use Energy?

•Characteristic of living organisms:•Obtain and use energy

•Types of Organisms•Autotroph

• An organism - capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds

•Heterotroph• An organism that obtains energy from the food

it consumes

•Characteristic of living organisms:•Obtain and use energy

•Types of Organisms•Autotroph

• An organism - capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds

•Heterotroph• An organism that obtains energy from the food

it consumes

PhotosynthesisPhotosynthesis•Converts light energy to sugar•food for ecosystems

•Converts light energy to sugar•food for ecosystems

Cellular RespirationCellular Respiration

•All living things must respire•Plants and Animals!

•Breaks down food (usually glucose) to release energy

C6H12O6 + O2 CO2 + H2O

•All living things must respire•Plants and Animals!

•Breaks down food (usually glucose) to release energy

C6H12O6 + O2 CO2 + H2O

The Carbon CycleOne organism’s waste is another’s

sustenance

The Carbon CycleOne organism’s waste is another’s

sustenance

Biomes and Net Primary ProductionBiomes and Net Primary Production•Gross primary production: The rate at which primary

producers undergo photosynthesis•Net primary production: The amount of organic matter

(biomass) that remains after primary producers use some to carry out cellular respiration• Ecosystems vary in their net primary productivity, the rate

at which primary producers convert energy to biomass.•Warm, wet biomes generally have higher net primary

productivity than cold, dry biomes.

•Gross primary production: The rate at which primary producers undergo photosynthesis•Net primary production: The amount of organic matter

(biomass) that remains after primary producers use some to carry out cellular respiration• Ecosystems vary in their net primary productivity, the rate

at which primary producers convert energy to biomass.•Warm, wet biomes generally have higher net primary

productivity than cold, dry biomes.

Lesson 6.1 Defining Biomes

Climate and ClimatographsClimate and Climatographs• Climate: Average conditions,

including temperature and precipitation, over long periods of time in a given area

• Weather: Day-to-day conditions in Earth’s atmosphere

• Climatographs: Diagrams that summarize an area’s average monthly temperature and precipitation

• Most important factors

• Each biome has a set of characteristic organisms adapted to its particular climate conditions.

Lesson 6.1 Defining Biomes

ClimatographClimatograph

Which Biome?Which Biome?

Which Biome?Which Biome?

Which Biome?Which Biome?