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Biogeochemical Cycles

Why are we bothering to study these things?

Tina Miklius

on 11 October 2012

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Transcript of Biogeochemical Cycles

Why are we bothering to study these things? Biogeochemical cycles
are made of elements
....24 out of over 100 All living things Some we need a LOT OF!!!
Some...not so much Of those 24 elements It is called a "Macronutrient" If we need a LOT of it
fancy that... It is called a micronutrient. If we don't need so much of it
<-- I don't know where that arrow came from. Carbon
Sulfur There are 6 BIG MACRONUTRIENTS These guys are fundamental for life, but there are other macronutrients too. For example, Carbon makes up molecules of life. CArbon joins with OXygen and Hydrogen to make carbohydrates.

Nitrogen makes up proteins

Phosphorus is used for energy

Calcium is used in your bones and teeth

What do these macronutrients do? These kinds of elements need to be AVAILABLE, they need to be in the RIGHT AMOUNTS, and they need to be available and the RIGHT TIME!
In order for life to keep on living..... They become a limiting factor. Thus, they prevent the growth of an individual, a population, or a species. It could cause extinction! x_x If the elements are NOT available Some... a whole lot
Some... a whole lot could kill us and other organisms
Some... are just plain neutral. How much of these elements do we need? Chemical?..... chemicals get cycled

Bio?.....life is involved

Geo?......it involves the atmosphere, water, rocks, and soil General Aspects of a Biogeochemical Cycle See page 112, second column
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