The first Kingdom is life is Archaebacteria. There are 3 main phyla in Archaebacteria. They are Methanogens, Halophiles, and Thermophiles. They emerged about 3.5 billion years ago and are found in places where the earth is young. They usually live is places where nothing else can survive.
Methanogens- They produce methane and are anaerobic bacteria. They are found in sewage plants and bogs. They can also live in the intestines of animals. They are capapble of nitrogen fixation.
Halophiles- They are bacteria and are usually found in salted areas like salt lakes.
Thermophiles- They love the heat and are found usually in hydrothermal vents and hot springs.
One example of an Archaebacteria is Methanococcus jannaschii. The genus name is Methanococcus and the species name is jannaschii. Thier habitat is in the deep oceanic thermal vents. These organisms don't really eat anything but they need hot, sulfur-rich water in order to live. It lives by taking energy from hot spring water which mixes with the freezing cold water of the ocean around it.
Other interesting facts-
1.They can reach up to temperatures of 85 degrees celcuis
2.They produce methane
3.It was isolated from a sediment sample which was collected from the sea floor at the base of a "white smoker" chimney
4.This chimney is located in the East Pacific
5.They grow at pressures of up to more than 200 atm
6.Methanococcus jannaschii was the first archaeal organisms whose genome was completely sequenced 3 years ago