(par 3. 3.3.1) Short-circuiting the phospherous cycle
Short-circuiting the phospherous cycle http://sciblogs.co.nz/crikey-creek/2009/10/09/p-addiction-overdose-and-eutrophication/ P addiction, overdose and eutrophication Daniel Collins We have an addiction problem. The craving for P goes right down to our bones and DNA. I’m not talking about methamphetamines, but phosphorus. We are about 1% phosphorus, by weight. Written as ‘P’ in chemical shorthand, it is an essential building block […]
(par 3. 3.3.2) Recycling of Matter in an Ecosystem
by Joseph West, Demand Media http://everydaylife.globalpost.com/recycling-matter-ecosystem-34660.html Undisturbed natural ecosystems are able to maintain a vibrant diversity of life because they incorporate intricate recycling systems that conserve essential materials. These materials include mineral nutrients, such as nitrogen or phosphorus, and important biological substances such as water or oxygen gas. Unlike energy, which generally flows into and […]
(par 3. 3.3 ) Rock Cycle
http://www.edu.pe.ca/southernkings/igneousjj.htm The rock cycle is an ongoing process, beginning as rocks are pushed up by tectonic forces, and eroded by wind and rain. The eroded rocks travel by wind or moving water until they are deposited, settling into layers. Additional eroded rocks may bury these layers until heat and pressure change the underlying layers to […]