All Cellular Lives survive in a sea of viruses Viruses are major players in the ecosystem, infecting every cellular life Animals: animal viruses Plants: plant viruses Archaea: archae viruses Fungi: mycoviruses(真菌病毒) Bacteria: bacteriophages(噬菌体) Viruses constitute a substantial amount of biomass on the earth (eg. there are 1030 bacteriophage particles alone in waters on the earth) 1 phage weighs about 1 femtogram(10-15 gram) 1030 phages weigh about =10-15 x 1030= 1015 gram 10 kilogram 109 tonsAll Cellular Lives Survive in a Sea of Viruses ¾ Viruses are major players in the ecosystem infecting every Viruses are major players in the ecosystem, infecting every cellular life z Animals: animal viruses z Plants: plant viruses z Archaea: archae viruses z Fungi: mycoviruses （真菌病毒 ） z Bacteria: bacteriophages (噬菌体 ） z …… ¾ Viruses constitute a substantial amount of biomass on the earth ( th 1030 (eg. there are 10 b t i h ti l l i t th 30 bac teriop hage parti cles alone in wa ters on the earth) 1 phage weighs about 1 femtogram (10-15 1 phage weighs about 1 femtogram (10 gram ) 1030 phages weigh about = 10-15 x 1030 = 1015 gram = 1012 kilogram = 109 tons