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NUTRIENT FLOW (OR) NUTRIENT CYCLING (OR) BIOGEOCHEMICAL CYCLE IN THE ECOSYSTEM.

Nutrients 

Elements, which are essential for the survival of both plants and animals are called nutrients. 




1. Macronutrients: The elements needed in large amounts are called macro nutrients.

    Examples - Oxygen, nitrogen, carbon, calcium, magnesium and phosphorus.

2. Micronutrients: The elements, needed in  small amounts are called micronutrients. 

    Examples - Boron, cobalt, strontium, zinc,  copper.

NUTRIENT CYCLES :

Cyclic flow of nutrients between the biotic and abiotic components is known as nutrient cycle or bio-geochemical cycles.

Nutrients enter into the producers and move through food chain and ultimately reach the consumer.The bound nutrients of the consumers, after death, are decomposed and converted into inorganic substances, which are readily used up by the plants (producers) and again the cycle starts.

The major nutrients like C, H, O and N are cycled again and again between biotic and abiotic component of the ecosystem.

Hydrological Cycle :

Movement of water in a cyclic manner is known as hydrological cycle 
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