Question

what are the biochemical cycles? describe various types of biochemical cycles in the ecosystem​

Answer 1

Broadly, the biogeochemical cycles can be divided into two types, the gaseous biogeochemical cycle and sedimentary biogeochemical cycle based on the reservoir.

Answer 2

A "biogeochemical cycle" is a pathway wherein a chemical substance moves through "biotic (biosphere)" & "abiotic (atmosphere, hydrosphere, & lithosphere) "compartments of the Earth".

Explanation:

• Nutrients ultimately are chemical compounds. There is therefore this natural path, which constantly circulates living matter. Nutrients in an ecosystem are rarely lost. At every stage, recycling of these nutrients takes place. The recycling of the nutrients thru the various components of an ecosystem is known as a nutrient cycle or biogeochemical cycle
• The biological cycles is divided into two groups, the biogeochemical gaseous-based cycle and the reservoir-based sedimentary biological cycle. Every nutrient cycle reservoir comprises an abiotic and an exchange pool where the biotic and the abiotic elements are rapidly exchanged.
• The sedimentary cycles have the earth’s crust as the reservoir pool. These cycles comprise the chemical components which are more earth-bound, like calcium, iron, sulphur, and so on. The gaseous cycles move more quickly when compared to the sedimentary cycles because of the large atmospheric reservoir.
• The gaseous cycles exist in the atmosphere (air)/ oeans through evaporation. The different gaseous cycles are the carbon cycle, nitrogen cycle, the water cycle, & oxygen cycle.

(i) Water Cycle/Hydrologic Cycle

Water evaporates into the atmosphere during this cycle from transpiring oceans  lakes, plants, rivers & lakes. Subsequently these water vapors cool off and condense to form water and clouds. As snow and rain, water then returns to the Earth.

(ii) Carbon Cycle

The bulk of carbon dioxide is photosynthesized in the living world. The synthesized organic compounds are passed on to the consumer (herbivores and carnivores), from the producers (green plants). Animals and plants emit carbon as carbon dioxide in their emissions out into the surrounding environment. The dead bodies of animals and plants and the body wastes that build up carbon compounds,  are decomposed by microorganisms to discharge carbon dioxide. Carbon is also recycled when  burning fossil fuels.

(iii) Nitrogen Cycle

Atmospheric nitrogen is elementary and cannot be used by living organisms as such. In order to be used by green plants it must be "fixed" along with other elements like carbon, oxygen, or hydrogen. Nitrogen  continually enters into the air by the action of "denitrifying bacteria" and returns to the cycle via the action of  electrification & lightening.

(iv) Oxygen Cycle

The body is directly supplied with oxygen used to breathe in plants and animals from the surrounding medium such as water & air. In the "form" of water & carbon dioxide, oxygen returns to the "surroundings". This also enters into the plant, during photosynthesis, as carbon dioxide & water and, as a by-product, is released into the same process in the form of molecular oxygen for use in respiration. The cycle is thus finished.

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Choose the best description for each cycle. 1. nitrogen a ...

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