They produce much of the
in the earth's atmosphere that aerobic life requires, and they are at the base of the
You have it wrong way round, the atmosphere of Earth was created by the life on Earth. 4000 million years ago the atmosphere had no oxygen and was full of CO2, Nitrogen and Methane. However life came into existence in this atmosphere and over time has altered the atmosphere to what we have today. Therefore the composition of the atmosphere would not appear to be critical to life.
The bulk of oxygen production on Earth is from phytoplankton in the oceans.
Earth shapes life. Life has to adapt to the environment they find here on earth.
They produce much of the oxygen in the earth's atmosphere that aerobic life requires, and they are at the base of the food chain in most marine environments
phytoplankton provide most of the oxygen to earth.
yes the fragile platform of life on earth.
Phytoplankton affects the ecosystem of the entire earth in the sense that phytoplankton is at the very top level of the food chain. Fish and whales eat phytoplankton for energy and then we eat fish for energy.
IR as in infrared? Who says it is "critical"? Search for life elsewhere in the Galaxy, or here on Earth?
It supports all life.
Phytoplankton form the foundation for most marine life food webs. Also they are responsible for half the photosynthetic activity on earth. My source was : http://www.ehow.com/about_5414740_importance-phytoplankton.html
the relationship is that seens phytoplankton need sunlight to survive and phytoplankton are the base of the food chain they connect to sun to phytoplankton to other sea life
Phytoplankton, which is a microscopic and autotrophic organism. There are trillions of phytoplankton in the ocean.