Biogeochemical Cycles By: Garrett LONg

Water Cycle

The water cycle is the path that water takes between the sky to the land and back to the sky. When water is on land the sun provides energy to evaporate the water back to the sky. Then the condensation forms clouds which then the clouds precipitate (Rain, Hail, Snow, Sleet, Etc.) which turns into runoff. Which brings the water back to the ground and the cycle continues from the beginning again.

Chemical reactions: None

Inorganic Compounds: Everything

Human Interference's: Storage of water in reservoirs, Groundwater mining, Irrigation, Urbanization, Combustion, Deforestation, and Wetlands. This reduction of runoff makes the sea level lower 0.8 mm per year.

Nitrogen Cycle

When nitrogen is converted into many different forms as it goes through the atmosphere, terrestrial, and marine ecosystems. It starts out as bacteria converting nitrogen gas into ammonia which plants use. The second step is when ammonia is converted into nitrate ions that plants take in as nutrients. After living organisms use this nitrogen the next step in the cycle is ammonification, where decomposing bacteria convert the waste compounds into simpler compounds. The last and final step is denitrification, where bacteria converts simple nitrogen compounds back into nitrogen gas, which then the gas returns to the atmosphere and starts the cycle again.

Chemical reactions: Fixation, Nitrogen Fixation, Ammonification, Nitrification, Denitrification

Organic Compounds: Bacteria and decomposed animals

Inorganic Compounds: Nitrogen, Nitrate, Nitrate ions, Water

Human Interactions: Automobiles, Factories, Power plants, and other combustion processes which puts more Nitrogen into the atmosphere which affects the Nitrogen cycle.

Carbon Cycle

Carbon enters the atmosphere as carbon dioxide. Then the carbon dioxide is absorbed by producers to make carbohydrates in photosynthesis. After that animals eat plants that contain the carbohydrates, most of the carbon they consume is exhaled as carbon dioxide formed during respiration. These animals then die. The dead organisms are then eaten by decomposers and their carbon returns to the ground as carbon dioxide. The decomposers give off carbon dioxide back into the atmosphere.

Chemical Reactions: Cellular Respiration, Photosynthesis

Organic Compounds: Glucose

Inorganic Compounds: Carbon Dioxide

Human Impact: Burning fossil fuels in coal factories, deforestation, exhalation of carbon dioxide

Phosphorus Cycle

Over time with weathering rocks release phosphate ions. Then inorganic phosphorus distribute into the soil and water. After that plants take up the minerals from the soil. Then animals eat the plants and the ions are incorporated into organic molecules such as DNA. When the animals or plants die the organic phosphorus then goes back into the soil. Now that it is back into the soil bacteria breaks it down into inorganic forms of phosphate. The phosphorus can end up in waterways and the ocean. Once their it will be incorporated into sediments over time.

Chemical Reactions: Phosphates into animals and converted to what they need

Organic Compounds: Bacteria and Fungis

Inorganic Compounds: Water

Human Impact: Humans impact the phosphorus cycle by using agriculture fertilizer, when it rains more phosphate is put into the water because of this fertilizer and it leads to eutrophication. This is the makes plants grow at a excessive rate.



Created with images by NASA Goddard Space Flight Center - "Maria Frostic - Main Iceberg Lagoon" • Jan-Helge69 - "Red clouds" • Yuya Tamai - "liquid nitrogen" • Jameziecakes - "Carbon" • Archit Ratan Photography - "Landscape on pool steam across checkdam"

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