Aleutian Island Ecosystem Collapse

http://www.commondreams.org/headlines01/0128-01.htm

Carbon cycle information

http://www.sciencedaily.com/releases/2008/05/080513101652.htm

nitrogen cycle

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/N/NitrogenCycle.html

Amazon/Orinoco Article

http://www.naturalhistorymag.com/index_archive.html