Nutrient Cycling In Nature | Carbon Cycle, Water Cycle & Their Importance

Nutrient cycles involve the circulation of specific elements, such as carbon, sulfur, and water, in the natural environment.   Carbon Cycle: The carbon cycle describes how carbon dioxide is utilized from the atmosphere through photosynthesis and returned to the atmosphere via respiration and decay. The processes involved in the carbon cycle include photosynthesis, respiration, putrefaction, […]

Nutrient cycles involve the circulation of specific elements, such as carbon, sulfur, and water, in the natural environment.

 

Carbon Cycle:

The carbon cycle describes how carbon dioxide is utilized from the atmosphere through photosynthesis and returned to the atmosphere via respiration and decay. The processes involved in the carbon cycle include photosynthesis, respiration, putrefaction, and combustion. Photosynthesis removes carbon dioxide from the atmosphere, while the other three processes release carbon dioxide back into the atmosphere.

 

  1. Photosynthesis: Carbon dioxide in the air diffuses into leaves, where it is converted into sugars and other complex compounds. When plants are consumed by animals, sugars enter the animal’s body cells.
  2. Respiration: Within the animal body, the breakdown of chemical food substances releases carbon dioxide, water, and energy. Carbon dioxide is released into the atmosphere.
  3. Putrefaction: When plants and animals die, they decay, and bacteria and other microbes involved in the decay process respire, releasing carbon dioxide back into the atmosphere.
  4. Combustion: Burning fuels such as coal, wood, petrol, and kerosene releases carbon dioxide into the atmosphere.

From the sea, more carbon dioxide is liberated when there is a low quantity in the atmosphere, and conversely, more dissolves in the sea when there is an excess of carbon dioxide in the atmosphere.

 

Importance of the Carbon Cycle:

  1. All living things are composed of carbon.
  2. Carbon is present in all food components.
  3. The process produces carbon dioxide for photosynthesis.
  4. Maintains the carbon-oxygen balance in the atmosphere.

 

Water Cycle:

The water cycle is the process through which water is used and returned to the atmosphere as water vapor, ultimately falling back as rain. It involves two main processes: condensation and evaporation.

When rain falls, some is absorbed by plants, evaporating through transportation. Animals also use water, releasing water vapor during respiration and excretion. Some rain directly enters water bodies, while some filters through soil to form underground water that eventually reaches oceans. Water returns to the atmosphere through evaporation, forming clouds that may precipitate as rain.

 

Importance of Water to Plants:

  1. Cools the plant during transportation.
  2. Acts as an agent of weathering for soil formation.
  3. Aids seed germination.
  4. Facilitates the dissolution of plant nutrients for absorption.
  5. Necessary for photosynthesis.
  6. Provides plant support through rigidity.

 

Importance of Water to Animals:

  1. Main component of animal bodies.
  2. Solvent for soluble food substances during digestion.
  3. Medium for nutrient transportation.
  4. Constituent of blood.
  5. Facilitates excretion and regulates body temperature.
  6. Basis for body secretions like hormones and enzymes.
  7. Medium for biochemical reactions in living organisms.

Related Posts:

Plant Nutrition

Organization of Life

Characteristics Of Living Things

Living Things And Non-Living Things

Biology

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