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Environmental Cycles (Carbon Cycle: (Oceans also suck up more carbon…
Environmental Cycles
Carbon Cycle:
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Plants especially trees are known as carbon dioxide sinks because they take carbon out of the atmosphere and release oxygen.
Oceans also suck up more carbon dioxide than they release,
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Since the start of the industrial revolution about 200 years ago the carbon in the atmosphere increased by about 40 percent.
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Nitrogen Cycle:
The series of processes by which nitrogen and its compounds are interconverted in the environment and in living things, including nitrogen fixation and decomposition
Nitrogne is an essential component of DNA, RNA, and Proteins, the building blocks of all life.
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Although the majority of the air we breathe is N2, most of the nitrogen in the atmosphere is unavailable for use by organisms.
This is because the strong triple bond between the N atoms in N2 molecules makes it relatively inert, or unreactive, whereas organisms need reactive nitrogen to be able to incorporate it into cells.
Nitrogen enters the living world by way of bacteria and other single-celled prokaryotes, which convert atmospheric nitrogen text N_2N2N, start subscript, 2, end subscript into biologically usable forms in a process called nitrogen fixation.
Some nitrogen-containing compounds fall to the ocean floor as sediment. Over long periods of time, the sediments get compressed and form sedimentary rock.
In natural ecosystems, many processes, such as primary production and decomposition, are limited by the available supply of nitrogen.
Phosphorous Cycle:
It is in rocks where the phosphorus cycle begins. When it rains, phosphates are removed from the rocks via weathering and are distributed throughout both soils and water.
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As phosphate PO4, it makes up an important part of the structural framework that holds DNA and RNA together.
The phosphorus cycle differs from the other major biogeochemical cycles in that it does not include a gas phase.
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The phosphates then moves from plants to animals when herbivoreseat plants and carnivores eat plants or herbivores.
The phosphates absorbed by animal tissue through consumption eventually returns to the soil through the excretion of urine and feces, as well as from the final decomposition of plants and animals after death.
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