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A commonly cited example is the water cycle.

In Earth science, a biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth. A cycle is a series of change which comes back to the starting point and which can be repeated.[1][2] Water, for example, is always recycled through the water cycle, as shown in the diagram. The water undergoes evaporation, condensation, and precipitation, falling back to Earth. Elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another through biogeochemical cycles.[1][2]'

The term "biogeochemical" tells us that biological, geological and chemical factors are all involved. The circulation of chemical nutrients like carbon, oxygen, nitrogen, phosphorus, calcium, and water etc. through the biological and physical world are known as biogeochemical cycles. In effect, the element is recycled, although in some cycles there may be places (called reservoirs) where the element is accumulated or held for a long period of time (such as an ocean or lake for water).[1][2]

Important cycles[edit]

The most well-known and important biogeochemical cycles, for example, include

There are many biogeochemical cycles that are currently being studied for the first time as climate change and human impacts are drastically changing the speed, intensity, and balance of these relatively unknown cycles. These newly studied biogeochemical cycles include

Biogeochemical cycles always involve hot equilibrium states: a balance in the cycling of the element between compartments. However, overall balance may involve compartments distributed on a global scale.

As biogeochemical cycles describe the movements of substances on the entire globe, the study of these is inherently multidiciplinary. The carbon cycle may be related to research in ecology and atmospheric sciences.[4] Biochemical dynamics would also be related to the fields of geology and pedology (soil study).[5]

Global biogeochemical cycles critical for life
Diagram of the nitrogen cycle
Diagram of the water cycle
Diagram of the carbon cycle
Diagram of the oxygen cycle
Diagram of the phosphorus cycle

See also[edit]

References[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Biogeochemical_cycle — Please support Wikipedia.
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A look into the cycle of the element nitrogen. A great study tool for any APES students or teachers.

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78 news items

University of Wisconsin-Madison

University of Wisconsin-Madison
Thu, 15 Jan 2015 14:15:30 -0800

While the study focuses on several of these, including climate change and a troubling loss of biodiversity, Carpenter led the examination of biogeochemical cycle changes. Specifically, Carpenter looked at two elements essential to life as we know it: ...

The Daily Galaxy (blog)

The Daily Galaxy (blog)
Mon, 19 Jan 2015 08:38:18 -0800

While the study focuses on several of these, including climate change and a troubling loss of biodiversity, Carpenter led the examination of biogeochemical cycle changes. Specifically, Carpenter looked at two elements essential to life as we know it, ...
 
Freshare
Thu, 15 Jan 2015 13:33:45 -0800

While the study focuses on several of these, Carpenter led the examination of biogeochemical cycle changes. Specifically, Carpenter looked at two elements essential to life as we know it, phosphorus and nitrogen. Both are widely used to fertilize crops ...

Canada.com

Canada.com
Thu, 15 Jan 2015 11:01:36 -0800

Bennett studies problems with the planet's biogeochemical cycle which are causing toxic algae blooms and “dead zones” in lakes and coastal areas. Last summer, close to half a million residents of Toledo, Ohio, were told not to drink or bathe in the ...

World Tech Today

World Tech Today
Sat, 17 Jan 2015 06:37:30 -0800

Although the research team focused on climate change and loss of biodiversity among other environmental issues, Carpenter focused on biogeochemical cycle changes that reflect in the levels of phosphorus and nitrogen, two essential elements for ...
 
Nature.com (subscription)
Wed, 05 Oct 2011 10:05:30 -0700

Excess phosphorus is polluting our environment while, ironically, mineable resources of this essential nutrient are limited. James Elser and Elena Bennett argue that recycling programmes are urgently needed.
 
News-Medical.net
Sat, 15 Oct 2011 06:18:26 -0700

Should the periodic table bear a warning label in the 21st century or be revised with a lesson about elemental supply and demand? If so, that lesson could start with one element considered a staple of life - but growing endangered, like the Asiatic ...
 
National Science Foundation (press release)
Mon, 03 Aug 2009 23:23:57 -0700

A biogeochemical cycle is a pathway by which a chemical element, such as carbon, or compound, like water, moves through Earth's biosphere, atmosphere, hydrosphere and lithosphere. In effect, the element is "recycled," although in some cycles the ...
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