Feeding Relationships in a Community

Food Chain Food Web Energy Pyramids Cycles of Matter

Food Chains A food chain shows the transfer of energy through a community. Example: Grass  Grasshopper  Robin  Bacteria

Each food chain has at least one… Producer Consumer Decomposer

Producers Organisms in a community that make their own food through photosynthesis. Also known as photosynthetic organisms Examples: Green Plants Algae

Consumers Organisms in the community that eat other organisms. There are several types of consumers: Herbivores Carnivores Omnivores Scavengers Decomposers

Herbivores Consumers that eat only plants. Examples: Also called primary consumers Examples: Deer Rabbits Grasshoppers Squirrels

Carnivore Consumers whose diet consist mostly of other animals. Also called secondary consumers Examples: Coyote Owls Hawks

Omnivore Organism who eat both plants and animals. Examples: Raccoon Fox Humans

Scavengers Eats something that is already dead Example: vulture

Decomposers Organisms that get that get their food from breaking down dead matter. Decomposers return nutrients (raw materials) back to the soil. Examples: Fungus (mushrooms) Bacteria

Check for Understanding: Use the information in the table on the next slide and identify each animal as a carnivore, omnivore or an herbivore. Elephant: _________________________ Tiger: ____________________________ Lynx: ____________________________ Coyote: __________________________

Animal Length of Life in the wild Diet Range Elephant About 70 years Roots, leaves, and grasses Asia, Africa Tiger About 20 years Antelope and other animals Asia Lynx About 10 years Deer, rodents and other small animals Europe, Asia, North America Coyote 5 to 6 years Grasses, grains, and small animals North America

Check for Understanding: Use the information in the table on the next slide and identify each animal as a carnivore, omnivore or an herbivore. Elephant: Herbivore Tiger: Carnivore Lynx: Carnivore Coyote: Omnivore

Food Web Shows the many food relationships in a community.

Energy Pyramid This is a model that shows the amount of energy available at each feeding level in an ecosystem. The producers at the bottom of the pyramid have the most energy AND largest number of organisms. Animals gain only a small amount of energy from the food they eat.

Check for Understanding: Look at the food web. Suppose a disease caused the population of mice to decrease. What other organisms would be affected by this change? _____________________ How might their populations change? __________________________________________________

Check for Understanding: Look at the food web. Suppose a disease caused the population of mice to decrease. What other organisms would be affected by this change? Snake, Insects, Shrew How might their populations change?

Which section of the pyramid has the most energy Which section of the pyramid has the most energy? _____________ Which section of the pyramid has the least energy? _____________

Which section of the pyramid has the most energy Which section of the pyramid has the most energy? The bottom Which section of the pyramid has the least energy? The Top

Place the organism in the food chain on the energy pyramid.

Place the organism in the food chain on the energy pyramid. Owl Mouse Insects Plants

Cycling Matter Through an Ecosystem Water Cycle Nitrogen Cycle Carbon Cycle

Water Cycle Cycle where water evaporates Travels into the air and becomes part of a cloud (condensation) Falls down to earth as precipitation Then evaporates again. This repeats again and again in a never-ending cycle.

Nitrogen Cycle –Click this link to watch a video. https://www. youtube

Carbon Cycle Analyze the diagram on the next slide and answer the questions below. List one way that Carbon Dioxide (CO2) is released into the atmosphere._______________________ Which organism uses the Carbon Dioxide? _________ Fossil fuels contain Carbon, how are they formed? ___________________________________________

Carbon Cycle

Carbon Cycle Analyze the diagram on the next slide and answer the questions below. List one way that Carbon Dioxide (CO2) is released into the atmosphere. Plant & Animal Respiration & Factory Emissions. Which organism uses the Carbon Dioxide? Plants Fossil fuels contain Carbon, how are they formed? Decaying organisms and waste products.