Foodweb and Trophic Levels - Food Webs and Trophic Pyramids - Other Biogeochemical Cycles

8 important questions on Foodweb and Trophic Levels - Food Webs and Trophic Pyramids - Other Biogeochemical Cycles

What are biogeochemical cycles?

Pathways that move chemical elements between living organisms and Earth's systems.

What is the main reservoir of nitrogen?

The atmosphere contains N₂ gas, making up ~78% of air.

Describe nitrogen fixation.

Conversion of N₂ to ammonia or ammonium by bacteria or lightning.
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What process converts ammonium to nitrate?

Nitrification takes ammonium to nitrite and then to nitrate by bacteria.

What is the significance of phosphorus in biology?

Phosphorus is part of nucleic acids, ATP, and phospholipids.

What human activity affects the phosphorus cycle?

Mining for fertilizers and runoff causing eutrophication.

What is the main reservoir for sulfur?

It is primarily found in rocks, ocean sediments, and atmosphere.

What contributes to acid rain?

SO₂ emissions through fossil fuel combustion and volcanic activity.

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