Amount of nitrogen fixed annually

Value ~240 TgN/year
Organism Biosphere
Reference Ilana Berman-Frank, Pernilla Lundgren, Paul Falkowski. Nitrogen fixation and photosynthetic oxygen evolution in cyanobacteria. Res Microbiol. 2003 Apr154(3):157-64. p. 162 right column, 2nd paragraphPubMed ID12706503
Comments The nitrogen cycle of Earth is one of the most critical yet poorly understood biogeochemical cycles. Current estimates of global N2 fixation are ~240 TgN/y with a marine contribution of 100–190 TgN/y. Of this, a single nonheterocystous cyanobacteria genus, Trichodesmium sp. contributes approximately ~100 TgN/y (Capone pers. comm.). See BNID 103507
Entered by Uri M
ID 105551