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Phosphorus Cycle

Molly, Michael, Chelsey
by

Molly Goodman

on 28 September 2012

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Transcript of Phosphorus Cycle

The Phosphorus Cycle Animals in the Cycle:
Animals are Biotic factors in the phosphorus cycle. They ingest plants containing phosphorus and when they excrete the plant matter, the phosphorus seeps into the soil. Phosphorus is important in maintaining and supporting the skeleton of the animals, as well as supplying them energy in the form of ATP. Phosphorus IS Important!! Rain on Rocks
Rain allows for the phosphorus in the rocks to release through weathering and seep into the soil. The phosphorus in the soil then seeps into the plant life and allows for steady growth. Both the rain and rocks are abiotic factors in the phosphorus cycle, while the plants are biotic. Runoff
Runoff form soil erosion transfers the phosphorus in the soil into the water source. The soil and water both act as Abiotic factors in the Phosphorus Cycle. The phosphorus that is transferred into the water allows for water plant growth, which then provides a food source for the marine organisms. Marine Organisms: Ocean Sediments:
After the fish excrete the the phosphorus it gets transferred into the ocean sediments. These sediments, over time, make there way up to the soil again through help of tectonic plates. This factor is an Abiotic one, not requiring living species. Humans Impact on the Natural Cycle of Phosphorus: The Phosphorus Cycle The Phosphorus Cycle is the only cycle that does not occur in the atmosphere. It affects the actual land and the species that live off the land more than the atmosphere. The phosphorus in the soil helps plants grow and also seeps into the water supply, helping water plants grow. These plants then feed animals. Without phosphorus, plant life, as well as animal and human life would suffer. This is why like most things, there must be a balance of phosphorus in the cycle. Too much phosphorus can also be potentially harmful. Marine Organisms ingest the phosphorus in the water that came from the runoffs. As the animals ingest the phosphorus, they digest it then excrete it. The Marine organisms are Abiotic factors in the Phosphorus Cycle. Phosphorus is a key nutrient that is needed for the growth of all living organisms. However, too much phosphorus degrades the water quality and can cause plants to overgrow. When humans use phosphorus rich fertilizer on farms near the Chesapeake, it seeps into the bay and the plants start to overgrow. This is bad for animals like blue crabs, because if a certain plant is growing rapidly, other plants around it cannot get as much sunlight and do not have as much room to grow which reduces the food source for animals like the blue crab. Humans are the ones to blame for the excessive levels of phosphorus in the water systems. Every cycle requires balance and due to agricultural waste, the phosphorus cycle is becoming unbalanced Many farms use manure as a fertilizer because it is organic and better for the environment overall than the more processed fertilizers, but the manure causes problems too. Manure contains phosphorus and the runoff causes an excess of phosphorus that contaminates the water. To help, humans can minimize their water runoff and improve their irrigation efficiency. Farmers can level their farms in order to limit and prevent runoff. If those farmers do intend to use manure for fertilizer, they can minimize the runoff and manage how much they use. They can also limit the amount of phosphorus in the diets of their livestock
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