Production

Decomposition

1. It is the process of formation of organic food material by the process of photosynthesis.

1. It is the process by which complex organic compounds are broken into simpler inorganic substances.

2. It is done by green plants.

2. It is done by bacteria and fungi.

3. Sunlight is needed

3. Sunlight is not needed.

Upright Pyramid

Inverted Pyramid

1. When the number of biomass of organsisms at the producer level is the highest as compared to the others in the ecosystem. The biomass in the subsequent trophic levels decreases. Then the pyramid formed is called an upright pyramid. 

1. When the number or biomass at the producer level is the lowest and there is subsequent increase in the biomass in the higher trophic levels then the pyramid formed is an inverted pyramid

2. Pyramid of energy is always upright. 

2. Pyramid of biomass and number can be inverted.

Food Chain

Food Web

1. A linear that depicts the food or energy relationship among organisms.

1. It is the network of various food chains which are interconnected with each other like a web.

2. It is not branched

2. It has many interlinks and braches.

Litter

Detritus

1. It refers to all kinds of waste matter above the ground.

1. Dead plant remains like leaves, bark, flowers and dead remains of animals including faecal matter is called detritus.

2. It contains both bio-deradable as well as non-biodradable matter.

2. It contains bio-degradable matter.

Primary Productivity

Secondary Productivity

1. The amount of biomass or organic matter produced per unit area over a time-period by plants during photosynthesis is called primary productivity.

1. The rate of formation of new organic matter by consumers is called secondary productivity.