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Producers and Consumers Autotrophs (self- feeders): •Make their own organic matter from inorganic nutrients. Heterotrophs (other- feeders): •Organisms that cannot make organic molecules from inorganic ones.

Producers and Consumers

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Producers and Consumers. Autotrophs (self-feeders): Make their own organic matter from inorganic nutrients. Heterotrophs (other-feeders): Organisms that cannot make organic molecules from inorganic ones. Energy Flow and Chemical Cycling in the Biosphere. Sunlight energy enters ecosystem. - PowerPoint PPT Presentation

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Page 1: Producers and Consumers

Producers and Consumers

Autotrophs (self-feeders):•Make their own organic matter from inorganic nutrients.

Heterotrophs (other-feeders):•Organisms that cannot make organic molecules from inorganic ones.

Page 2: Producers and Consumers

Energy Flow and Chemical Cycling in the Biosphere

Sunlight energyenters ecosystem

Photosynthesis

Cellular respiration

drives cellular work

Heat energy exits ecosystem

ATP

C6H12O6

(Glucose)+O2

(Oxygen)

CO2

(Carbon dioxide)

+H2O

(water)

Page 3: Producers and Consumers

Photosynthesis:•Is used by plants, some protists, and some bacteria•Transforms light energy into chemical energy •Uses carbon dioxide and water as starting materials

Photosynthesis

Carbon dioxide

6 O26 CO2 6 H2O C6H12O6

Water GlucosePhoto-synthesis Oxygen gas

Light energy

Page 4: Producers and Consumers

Photosynthesis– Organisms that use photosynthesis are:• Photosynthetic autotrophs• The producers for most ecosystems

Plants(mostly on land)

Photosynthetic Protists(aquatic)

PHOTOSYNTHETIC AUTOTROPHSPhotosynthetic Bacteria

(aquatic)

Micrograph of cyanobacteriaKelp, a large algaForest plants

LM

Page 5: Producers and Consumers

found b/w lower and

upper epidermis

Photosynthesis

Page 6: Producers and Consumers

LightH2O

O2

Chloroplast

Lightreactions

NADPH

ATP

Calvincycle

CO2

NADP+

ADPP

Sugar(C6H12O6)

Photosynthesis

Page 7: Producers and Consumers

*photon

*Photons are absorbed by

pigment molecules

Photosynthesis

Page 8: Producers and Consumers

Why Green?

Light

Chloroplast

Reflectedlight

Absorbedlight Transmitted

light

Page 9: Producers and Consumers

Light-harvesting complexes of the thylakoid membrane

Page 10: Producers and Consumers

Electron Flow

Page 11: Producers and Consumers

Organization of light reaction machinery

Page 12: Producers and Consumers

Chemiosmosis: A Comparison

Page 13: Producers and Consumers

Calvin cycle (Carbon Fixation)

Page 14: Producers and Consumers

Photosynthesis

Page 15: Producers and Consumers

Alternative Pathways

Sugar

C4 Pathway(example: sugarcane)

C4 plant CAM plantSugar

Calvincycle

Calvincycle

Day

Celltype 1

Four-carboncompound

Night

Four-carboncompound

Celltype 2

CAM Pathway(example: pineapple)

ALTERNATIVE PHOTOSYNTHETIC PATHWAYS

CO2 CO2

CO2 CO2


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