LESSON 3: Food Chain and Food Web

Autotrophs

These are organisms that produce their own food using light or chemical energy.

Photoautotrophs

Use sunlight for photosynthesis.

Chemoautotrophs

Use chemical reactions (usually involving sulfur or nitrogen

compounds) to make food.

Examples: Some bacteria like Nitrosomonas and Sulfolobus

heterotrophs

These organisms depend on other organisms for food.

herbivores

Eats plants Example for cow and

carnivores

Eats other animals, example lion and eagle

omnivores

Eat both plants and animals, example humans, and bears

decomposers

breakdown, dead organisms, example, fungi, and bacteria

food chain

Flow of energy in an ecosystem is a one-way process the sequence of organisms to which the energy flows is called

food chain

In ____ Each organism obtains energy from the one at the level below

producers

Plants are called_____ because they create their own food through photosynthesis

Consumers

Animals are _____ because they cannot create their own food, they must eat plants of other animals to get the energy that they

grazing food chain, detritus food chain

What are the types of food chain?

grazing food chain

This consumers utilizing plants as their food, constitute grazing food chain

grazing food chain

This food chain begins from green plants and the primary consumer is herbivore

Grazing food chain

Most of the ecosystem in nature follows this type of food chain, example grass, grasshopper, birds, falcon

detritus food chain

This type of food chain starts from that organic matter of the king animals implant buddies to the microorganisms, and detritus Feeding organism and to other predators

detritus food chain

This food chain depends, mainly on the influx of organic matter produced in another system

detritus food chain

this organism of the food chain includes algae, bacteria, fungi, protozoa, insects, Nematodes

food web

Is a network of food chains, which are interconnected at various tropic levels, so as the form a number of feeding connections amongst different organisms of a biotic community

consumer resource system

Food web is also known as

node

Represents an individual species or a group of related species or different stages of single places

link

Connect to notes, arrows, represent links, and always go from pray to predator

basal species

The lowest traffic levels called?

top predators

The highest traffic level are called

unidirectional and non cyclic

Movements of nutrients is cyclic, but of energy is

topological webs, flow webs, interaction webs

What are the types of food web representation?

Topological webs

This food web simply indicate a Feeding relationship

flow webs

Bioenergetic webs or include information on the strength of the feeding interaction

interaction web

The arrows show how one group influences another