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. 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.'
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).
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. Biochemical dynamics would also be related to the fields of geology and pedology (soil study).
|Global biogeochemical cycles critical for life
Paul Andersen explains how biogeochemical cycling is used to move nutrients from the environment into living material and back again. He explains the water c...
Ecology - Biogeochemical Cycles
Video notes on biogeochemical cycles - nitrogen, carbon, & phosphorus.
The Hydrologic and Carbon Cycles: Always Recycle! - Crash Course Ecology #8
Hank introduces us to biogeochemical cycles by describing his two favorites: carbon and water. The hydrologic cycle describes how water moves on, above, and ...
Biogeochemical Cycles (honors biology) updated
This video is taught at the high school level. I use this PowerPoint in my honors biology class at Beverly Hills High School. Topics: - Hydrologic (water) cy...
Earth System Science 1: Intro to ESS. Lecture 22. Biogeochemical Cycles
UCI ESS 1: Introduction to Earth System Science (Fall 2013) Lec 22. Introduction to Earth System Science -- Biogeochemical Cycles -- View the complete course...
Mr. Walker's APES - Biogeochemical Cycles
A video explaining the carbon, water, nitrogen, sulfur, and phosphorus cycles.
This is a video of the carbon cycle, nitrogen cycle, oxygen cycle, and phosphorous cycle for Mr. Conover's class.
Goch - Biogeochemical Cycle
Download the full album from Ektoplazm: http://www.ektoplazm.com/free-music/goch-terrapin Artist: Goch Track: Biogeochemical Cycle Album: Terrapin Track numb...
Biogeochemical Cycles: Nitrogen
A look into the cycle of the element nitrogen. A great study tool for any APES students or teachers.
The Carbon Cycle - The Primary Biogeochemical Cycle
A gentle walk through the most basic Biogeochemical Cycle - CARBON, CO2, CO3 - exposing the depth, and ease of damage, resulting from imbalances in cycling d...
Wed, 05 Oct 2011 10:03:45 -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.
Wed, 25 Feb 2015 02:52:30 -0800
기후변화 과학적 근거 분야는 기후변화 관측, 고기후(古氣候), 탄소순환과 생지(生地)화학순환(biogeochemical cycle), 구름과 에어로졸(대기 중에 부유하는 고체 또는 액체상태의 작은 입자) 등 총 9개 분야로 이뤄졌다. 보고서에 따르면 우리나라는 연평균 기온과 ...
Fri, 14 Oct 2011 08:11:15 -0700
In their commentary "The phosphorus cycle: a broken biogeochemical cycle" published in the Sept. 6 issue of Nature, the duo examine the lack of public and governmental discourse about the plight of the element phosphorus - and the potential social ...
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 ...
Thu, 26 Feb 2015 00:03:45 -0800
먼저 구성을 보면, 기후변화 과학적 근거 분야는 기후변화 관측, 고기후(古氣候), 탄소순환과 생지(生地)화학순환(biogeochemical cycle), 구름과 에어로졸(대기 중에 부유하는 고체 또는 액체상태의 작은 입자) 등 총 9개 분야로 이뤄졌다. 기후변화 영향 및 적응 ...
The Utah People's Post
The Utah People's Post
Fri, 16 Jan 2015 04:00:00 -0800
Humankind is Exceeding Planetary Boundaries Climate change is a much debated issue, with arguments on both sides. Yet researchers continue to pursue this problem in hopes of finding definitive evidence in support of their claims. A recent study ...
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, ...
Michigan Tech News
Fri, 27 Jun 2014 07:42:32 -0700
“Now humans fix as much nitrogen as all the bacteria in the world, which is just astounding to me,” says Gorman. “In just 100 years, we have become a very important part of this biogeochemical cycle.” Along with the introduction of pesticides, nitrogen ...
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