Plankton

1.  I believe the 2010 article is the most accurate.
2. That phytoplankton has been declining by about 1% a year since 1900. In some places it has declined by 40% since 1950.
3.  Warmer temperatures affect directly the cycle of phytoplankton.
4.  It hasn't really changed much over the years.
5. Satalites.
6.  It will end up collapsing the food chain and could cause issues for humanity in the long run.
7.  I think humans are causing global warming I do disagree on the causes though.