Bell Ringer: Define and give examples of the following: Autotroph Heterotroph Herbivore Omnivore Carnivore Decomposer
Feeding Relationships • There are 3 main types of feeding relationships 1. Producer - Consumer 2. Predator - Prey 3. Parasite - Host
Feeding Relationships Producer- all autotrophs (plants),they trap energy from the sun • Bottom of the food chain
Feeding Relationships Consumer- all heterotrophs: they ingest food containing the sun’s energy • Herbivores • Carnivores • Omnivores • Decomposers
Feeding Relationships CONSUMERS • Primary consumers • Eat plants • Herbivores • Secondary, tertiary … consumers • Prey animals • Carnivores or Omnivores
Feeding Relationships Consumer-Carnivores-eat meat • Predators • Hunt prey animals for food.
Feeding Relationships Consumer- Carnivores- eat meat • Scavengers • Feed on carrion, dead animals
Feeding Relationships Consumer- Omnivores -eat both plants and animals
Feeding Relationships Consumer- Decomposers • Breakdown the complex compounds of dead and decaying plants and animals into simpler molecules that can be absorbed
Label Your Organism:Producer, Herbivore, Carnivore, Omnivore, Decomposer, or Scavenger
Nitrosomonas is a genus of bacteria and a decomposer in the coral reef. Where would it go in our food web?
Bellringer • Draw a food chain with at least 5 organisms • Must include: • 1 producer • 4 consumers (one must be a decomposer)
Energy Flow Food chain- simple model that shows how energy moves through an ecosystem in ONE direction The ARROW shows where the ENERGY goes!
Trophic Levels • Each link in a food chain is known as a trophic level. • Trophic levels represent a feeding step in the transfer of energy in an ecosystem.
Energy Flow Food web- shows all possible feeding relationships in a community at each trophic level • Represents a network of interconnected food chains • Remember: ARROW = ENERGY
Trophic Levels • Only 10% of the energy is able to be stored in the organisms tissues and transferredto the next trophic level. • The rest of the energy was used by the organism for life processes or given off as heat.
Food chain Food web (just 1 path of energy) (all possible energy paths)
Ecological Pyramids 3 Types: • Biomass Pyramid • Amount of living tissue in an ecosystem • Energy Pyramid • Flow of energy in an ecosystem • Pyramid of Numbers • Number of organisms in each trophic level These 3 types may be combined!
Biomass Biomass- the amount of organic matter comprising a group of organisms in a habitat. • As you move up a food chain, both available energy AND biomassdecrease. • WHY???
Biomass Pyramid Note: Kilogram (Kg) is a unit of mass.
Energy Pyramid E N E R G Y 0.1% Tertiary consumers- top carnivores Heat Heat Heat 1% Secondary consumers-small carnivores 10% Primary consumers- Herbivores 100% Producers- Autotrophs
Energy Pyramid Note: Joules (J) & Kilocalories (C) are units of energy