@article{fdi:010061139,
  title = {{D}atabase of diazotrophs in global ocean : abundance, biomass and nitrogen fixation rates},
  author = {{L}uo, {Y}.{W}. and {D}oney, {S}.{C}. and {A}nderson, {L}.{A}. and {B}enavides, {M}. and {B}erman-{F}rank, {I}. and {B}ode, {A}. and {B}onnet, {S}ophie and {B}ostr{\¨o}m, {K}.{H}. and {B}{\¨o}ttjer, {D}. and {C}apone, {D}.{G}. and {C}arpenter, {E}.{J}. and {C}hen, {Y}.{L}. and {C}hurch, {M}.{J}. and {D}ore, {J}.{E}. and {F}alcón, {L}.{I}. and {F}ernández, {A}. and {F}oster, {R}.{A}. and {F}uruya, {K}. and {G}ómez, {F}. and {G}undersen, {K}. and {H}ynes, {A}.{M}. and {K}arl, {D}.{M}. and {K}itajima, {S}. and {L}anglois, {R}.{J}. and {L}a{R}oche, {J}. and {L}etelier, {R}.{M}. and {M}arañón, {E}. and {M}c{G}illicuddy, {D}.{J}. {J}r. and {M}oisander, {P}.{H}. and {M}oore, {C}.{M}. and {M}ouriño-{C}arballido, {B}. and {M}ulholland, {M}.{R}. and {N}eedoba, {J}.{A}. and {O}rcutt, {K}.{M}. and {P}oulton, {A}.{J}. and {R}ahav, {E}. and {R}aimbault, {P}. and {R}ees, {A}.{P}. and {R}iemann, {L}. and {S}hiozaki, {T}. and {S}ubramaniam, {A}. and {T}yrrell, {T}. and {T}urk-{K}ubo, {K}.{A}. and {V}arela, {M}. and {V}illareal, {T}.{A}. and {W}ebb, {E}.{A}. and {W}hite, {A}.{E}. and {W}u, {J}. and {Z}ehr, {J}.{P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}arine {N}2 fixing microorganisms, termed diazotrophs, are a key functional group in marine pelagic ecosystems. {T}he biological fixation of dinitrogen ({N}2) to bioavailable nitrogen provides an important new source of nitrogen for pelagic marine ecosystems and influences primary productivity and organic matter export to the deep ocean. {A}s one of a series of efforts to collect biomass and rates specific to different phytoplankton functional groups, we have constructed a database on diazotrophic organisms in the global pelagic upper ocean by compiling about 12 000 direct field measurements of cyanobacterial diazotroph abundances (based on microscopic cell counts or q{PCR} assays targeting the nif{H} genes) and {N}2 fixation rates. {B}iomass conversion factors are estimated based on cell sizes to convert abundance data to diazotrophic biomass. {T}he database is limited spatially, lacking large regions of the ocean especially in the {I}ndian {O}cean. {T}he data are approximately log-normal distributed, and large variances exist in most sub-databases with non-zero values differing 5 to 8 orders of magnitude. {R}eporting the geometric mean and the range of one geometric standard error below and above the geometric mean, the pelagic {N}2 fixation rate in the global ocean is estimated to be 62 (52–73) {T}g {N} yr−1 and the pelagic diazotrophic biomass in the global ocean is estimated to be 2.1 (1.4–3.1) {T}g {C} from cell counts and to 89 (43–150) {T}g {C} from nif{H}-based abundances. {R}eporting the arithmetic mean and one standard error instead, these three global estimates are 140 ± 9.2 {T}g {N} yr−1, 18 ± 1.8 {T}g {C} and 590 ± 70 {T}g {C}, respectively. {U}ncertainties related to biomass conversion factors can change the estimate of geometric mean pelagic diazotrophic biomass in the global ocean by about ±70%. {I}t was recently established that the most commonly applied method used to measure {N}2 fixation has underestimated the true rates. {A}s a result, one can expect that future rate measurements will shift the mean {N}2 fixation rate upward and may result in significantly higher estimates for the global {N}2 fixation. {T}he evolving database can nevertheless be used to study spatial and temporal distributions and variations of marine {N}2 fixation, to validate geochemical estimates and to parameterize and validate biogeochemical models, keeping in mind that future rate measurements may rise in the future. {T}he database is stored in {PANGAEA} (doi:10.1594/{PANGAEA}.774851).},
  keywords = {{BASE} {DE} {DONNEES} ; {MILIEU} {MARIN} ; {MICROORGANISME} ; {PHYTOPLANCTON} ; {FIXATION} {BIOLOGIQUE} {DE} {L}'{AZOTE} ; {PRODUCTION} {PRIMAIRE} ; {FONCTIONNEMENT} {DE} {L}'{ECOSYSTEME} ; {BIOMASSE} ; {ABONDANCE}},
  booktitle = {},
  journal = {{E}arth {S}ystem {S}cience {D}ata},
  volume = {4},
  numero = {1},
  pages = {47--73},
  ISSN = {1866-3508},
  year = {2012},
  DOI = {10.5194/essd-4-47-2012},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061139},
}