3.1 Energy Flow in Ecosystem Mrs. Trimble Mrs. Perryman

Photosynthesis Life depends on the sun Requires: Carbon dioxide and water Produces: glucose, oxygen and releases some water

Cellular Respiration The process of cells breaking down food to yield energy Requires: Glucose and oxygen Produces: Energy,Carbon dioxide and water.

They need each other

Feeding Relationships Producers (Autotrophs)- Plants Consumers (Heterotrophs)- organisms that get their food by consuming other organisms

Types of Consumers Herbivore- eats plants Carnivore- eats animals Omnivore- eats both plants and animals Decomposer- breaks down dead organisms in an ecosystem, returning them to nature

Energy Transfer Food Chain- sequence in which energy is transferred from one organism to the next

Energy Transfer Food Web- shows many feeding relationships

Biomass Pyramid Trophic Level- each step in the energy trophic level Producers Primary Consumers/ Herbivore Secondary Consumer/ Consumers

Energy Loss within an ecosystem 90% of the energy at each level is due to normal daily activity. Only 10% of the biomass is passed onto the next level. 10,000 g/m2 1,000g/m2 100 g/m2

Now Let’s Practice!