Chapter 3 The Biosphere Section 3 – 2 Energy Flow
Energy Flow Energy flows through Ecosystems Energy In: ConsumersConvert to Heat Producers Convert to Carbohydrates
Producers - Photoautotrophs Key Concept: • Sunlight is the main source of energy for most life on earth.
Producers - Chemoautotrophs Key Concept: • Some organisms rely on energy stored in inorganic chemical compounds
Autotrophs An Autotroph Is Any Organism That Can Produce Its Own Food Supply!
Autotrophs = Producer AKA Also Known As PRODUCER captures energy and transforms it into organic, stored energy for the use of living organisms.
Photoautotroph Producer That Captures Energy from the sun by: • Photosynthesis • Adds Oxygen to the atmosphere • Removes Carbon Dioxide from the Atmosphere
Photoautotroph • On Land • Plants • In The Sea • Algae • Tidal Flats & Salt Marshes • Cyanobacteria
Chemoautotroph • Capture energy from the bonds of inorganic molecules • Hydrogen Sulfide • The Process Is Called: Chemosynthesis
Autotrophs Know the difference between Photosynthesis & Chemosynthesis
Consumers THAT’S YOU
Consumers You are a HETEROTROPH
Consumers Heterotrophs eat other organisms to obtain energy. • Herbivores • Eat Only Plants • Carnivores • Eat Only Other Animals
Consumers Heterotrophs eat other organisms to obtain energy. • Omnivores(That’s You) • Eat Plants & Animals • Detritivores • Feed On Dead Plant & Animal Remains • Decomposers • Fungi & Bacteria
Feeding Relationships Key Concept: Energy flows through an ecosystem in one direction from producers to various levels of consumers
Feeding Relationships • Food Chain • Simple Energy path through an ecosystem • Pg. 69 • Food Web • More realistic path through an ecosystem
Trophic Levels Each Level In A Food Chain or Food Web is a Trophic Level. • Producers • Always The First Trophic Level • How Energy Enters The System • Herbivores • Second Trophic Level
Trophic Levels Each Level In A Food Chain or Food Web is a Trophic Level. • Carnivores/Omnivores • Make Up The Remaining Trophic Levels Each level depends on the one below it for energy.
Ecological Pyramids Graphic Representations Of The Relative Amounts of Energy or Matter At Each Trophic Level Energy Pyramid Biomass Pyramid Pyramid of Numbers