ENERGY ROLES IN AN ECOSYSTEM. All living things are classified based on shared characteristics , hereditary (genetic) information, development and their (evolutionary history). They are also classified based on how they get their food.
They are also classified based on how they get their food.
are organism that can make their own food and will have chloroplast to absorb energy from the sun to help make their food. Producers are also known as .
are organisms that cannot make their own food and have to get their food from their environment.
Animals, some protists, fungi and some bacteria
Decomposer – Fungus and Bacteria
A decomposer is an organism that breaks down organic matter. Some bacteria and fungi decomposers. What they leave behind is used by primary producers as fertilizers.
ANIMALS are consumers that are also characterized by what they eat and their type of teeth and beaks.
Carnivores are animals that eat meat. animals often have sharp canine teeth and powerful jaws. They also have incisors and molars.
Herbivores are animals that eat plants. Herbivores are also called primary consumers. Most animals are herbivores. Herbivores types of teeth are incisors for cutting and molars for chewing.
Omnivores are animals that eat both animals and plants. Some omonivores include people, many monkeys and marmosets, lion tamarins, chimpanzees, and most bears.
Omnivore have canine teeth that are not as prominent most of the time, incisors and molars.
A detritivore is an organism that feeds on detritus, dead and decomposing organisms. What they leave behind is used by decomposers. Dung bettles and crabs are detritivores.
detritus -- Accumulated organic debris from dead organisms, often an important source of nutrients in a food web
Detritivores: consume litter, debris, and dung
Scavengers: clean-up dead carcasses
Decomposers: microorganisms that complete final breakdown of organic matter
Energy is transferred in a system from one organism to another.
What’s wrong in this food chain?
Food Web – network of all the food chains in an ecosystemFeeding Relationships
The organisms involved in an ecosystem make up a food chain.
At the bottom of the food chain are the photosynthetic producers which range from single-celled bacteria to redwood trees.
Next come the primary consumers who are eaten by the secondary consumers who are eaten by… you get the idea.
All consumers and producers are eventually eaten by decomposers.
Each level of consumption is called a trophic level. Primary producers are therefore in the first trophic level.
Usually no more than 5 links in a food chain. Why?
There cannot be too many links in a single food chain because the animals at the end of the chain would not get enough food (and hence energy) to stay alive.
LAST LINK IN FOOD CHAINS ARE: Detritivores, scavengers, and decomposers
PYRAMID OF NUMBERS
Pyramid of Numbers
Some of the energy is lost as heat