Lecture 3 material cycles

Material Cycles

in Ecosystem Lecture no. 3

2

Ecosystem

Abiotic Components

Climatic

Rain

Light

Wind

Temperature

Edaphic

Soil

pH

Minerals

Topography

Biotic Components

Producers (Autotrophs)

Consumers (Heterotrophs)

Primary Consumers (Herbivores)

Secondary Consumers (Primary

Carnivores)

Tertiary Consumers (Large Carnivores)

Quaternary Consumers

(Omnivores)

Decomposers (Saptrotrophs)

MATERIAL CYCLES IN

ECOSYSTEMS

3

Biogeochemical Cycle

As energy flows through the ecosystem there is also a

constant flow of matter.

Living beings take up several nutrients from their abiotic

environment and when they die they are returned to the

environment.

This cyclic movement of nutrient material between the biotic

and abiotic environment is called “Biogeochemical Cycle”.

4

Biogeochemical Cycle

Water cycle

Carbon cycle

Oxygen cycle

Nitrogen cycle

Sulfur cycle

Phosphorus cycle

5

Water Cycle or Hydrological Cycle

6

7

Carbon Cycle

8

9

Nitrogen Cycle10

11

Oxygen Cycle

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13

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