Ecosystem

Things to remember

• The transfer of energy and materials in the form of food from one trophic level to another trophic level by the repeated process of eating and being eaten is known as food chain.
• Primary source of energy for detritus food chain is dead organic matter called detritus.
• The producer consumer arrangement is known as trophic structure and the position that an organism occupies in a food chain is called trophic level.
• Food web is a network of food chains interconnected at various trophic levels.
• Autotrophs are those organisms that can make their own food.
• Those organisms which cannot prepare their own food and depends upon autotrophs for food are called heterotrophs.