Presentation on theme: "Energy Flow 3-2 Biology Flora. Producers Producers/autotrophs – organism that can capture energy from sunlight or chemicals and use it to produce its."— Presentation transcript:
Energy Flow 3-2 Biology Flora
Producers Producers/autotrophs – organism that can capture energy from sunlight or chemicals and use it to produce its own food – Ex: plants – Photosynthesizing bacteria Photosynthesis – process by which autotrophs use light energy to power reactions that convert carbon dioxide and water into carbohydrates Chemosynthesis – using chemical energy to produce carbohydrates
Consumers Consumer/Heterotrophs – organisms that rely on other organisms for their source of energy – Types of consumers: Herbivore – eat plants Carnivore – eat meat Omnivore – eats plants and meat Detritivores – feed on plant and animal remains Decomposers – break down organic matter
Feeding Relationships Sun/Inorganic Compounds Autotrophs Heterotrophs Food Chains – series of steps in which organisms transfer energy by eating and being eaten – Ex: grass grasshopper bird coyote bear Arrow goes where the food flows Ex: figure 3-7 – page 69
Cont. Feeding Relationships Each step of the food chain is known as a trophic level Producers make up the first trophic level Consumers make up the 2 nd, 3 rd, and higher trophic levels Each consumer depends on the trophic level below it for energy. Food Web – network of interactions formed by feeding relationships among organisms in an ecosystem. Links all the food chains together.
Ecological Pyramids Ecological Pyramid – diagram that shows the relative amounts of energy or matter contained in each trophic level of a food chain or web.
Ecological Pyramids – 3 types Energy Pyramid – Shows the relative amount of energy available at each trophic level – 10 % energy carry-over between each trophic level Biomass Pyramid – shows the total amount of living organic matter within a trophic level Pyramid of Numbers – Shows the number of individual organisms at each trophic level