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The phosphorus Cycle

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by

Khala Addison

on 30 September 2013

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Transcript of The phosphorus Cycle

Additional information that we should know.
1) Which organic compound is phosphorus found in?
Phosphorus is found in ATP, RNA, & DNA
2) Explain why phosphorus does not circulate in the troposphere to a great extent?
Phosphorus does not circulate in the troposphere to a great extent because there are no common gaseous forms of phosphorus, and is only found in the atmosphere as particles.
3) Identify the largest sinks for phosphorus.
The largest sinks for phosphorus are terrestrial rocks, ocean sediments, and water.
The phosphorus Cycle
What Chemical Reactions are involved with phosphorus?
Phosphorus is never found in its pure form, instead it is encountered as Phosphate (PO3-4).
What are the inorganic and organic reservoirs?
Some inorganic and organic compounds involved with phosphorus are land biota, oceans, rivers, or sedimentation.
Let's go over the pathway of movement...
Weathered Rocks
How do we as humans impact the phosphorus cycle?
We as humans impact the phosphorus cycle by mining and using fertilizer. Also by cutting down the rain forest. By using the fertilizer this changes some of the plants which causes the cycle to be unbalanced.
What exactly is the phosphorus cycle?
The phosphorus cycle is the global circulation of phosphorus from the environment to living organisms and back to the environment.
Weathered rocks release phosphorus, in the form of phosphate into the soil for plants to absorb.
Animals eat the plants that contain the phosphorus.
Now decomposers come into play when the plants and animals die and release waste.
From the decomposers coming they broke down the tissues and released phosphorus back into the soil.
Now that everything is back into the soil this causes run off from the animal waste and fertilizer.
Phosphorus in the soil
Plants obtain phosphorus
Herbivores and carnivores eat the plants
Decomposition occurs and phosphorus reenters the soil which also creates run off
4) Phosphorus is typically found in what ionic form?
Phosphorus is typically found in the form of ion PO 4^3- and HPO 4^2 essentially for nutrients for plants and animals.
5) Explain why the addition of phosphate compounds to aquatic areas typically has a dramatic effect on biological productivity.
The phosphates are also limiting factors for plant growth in marine ecosystems, because they are not very water soluable. Then eutrophication kicks in where if there is to much phosphate it promotes excessive amount of algae and it will depete the oxygen.
Continued Information
Last little bit of information
6) Comment on how human activities have influenced the phosphorus cycle regarding each of the following:
A. Mining phosphate rock -
Adds phosphate to water system in the form of run off.
B. Animal waste from livestock feedlots -
Increases the amount of phosphate in the soil & local fresh water.
C. Commercial phosphate fertilizers in agriculture areas -
Also increases the amount of phosphate in soil & local fresh water.
D. Discharge of municipal sewage/ waster water treatment facilities -
Lastly this also impacts the soil and fresh water.
Full transcript