BCO-DMO ERDDAP
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Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv
attribute NC_GLOBAL acquisition_description String Culturing and experimental conditions  \n Stock cultures of the two Atlantic C. watsonii isolates were provided\ncourtesy of Dr. Eric Webb. Both isolates were collected in March 2002, WH0401\nfrom 6\\u00ba 58.78' N, 49\\u00ba 19.70' W and WH0402 from 11\\u00ba 42.12S',\n32\\u00ba 00.64'W. Triplicate cultures were grown using a semi-continuous\nculturing technique (Garcia et al., 2011) at 28 degrees C in an artificial\nseawater medium (Chen et al., 1996). Nutrients were added to autoclaved\nseawater at the concentrations listed in the AQUIL recipe (Morel et al.,\n1979), except for nitrate, which was omitted. The growth rates of cultures\nwere measured over 2\\u20133 day intervals and were used to determine the\ndilution rate. Culture cell density was kept low (cells ml\\u20131 =\n50\\u2013500 \\u00d7 103 for experiments with WH0401 and 5.0\\u201330 \\u00d7 103\nfor WH0402) to prevent light limitation of photosynthesis and deviation from\nthe expected pH values for respective pCO2 culture treatments. Light was\nsupplied with cool-white fluorescent lamps on a 12:12 h light:dark cycle and\nmeasured with a LI-250A light meter (LiCor Biosciences, light sensor serial#\nSPQA 4020). Because of large differences in cell size between WH0401 and\nWH0402, WH0401 was cultured at higher cell densities to maintain relatively\nequivalent levels of total culture biomass (0.1\\u20132.5 mM particulate C for\ncultures of WH0401; 0.1\\u20131.3 mM particulate C for WH0402). Cells were\nconsidered fully acclimated to treatment conditions after cultures had\nremained at steady-state growth for seven generations or more (unless stated\notherwise). Fast growing cultures (i.e. high light cultures) were acclimated\nfor more than ten generations while slow growing cultures (i.e. low light and\nlow pCO2 cultures) were acclimated over two months but for fewer generations.\nCultures were sampled over the period between 24 and 48 h after the preceding\ndilution to measure growth rates, gross and net 15N2-fixation rates,\nCO2-fixation rates, and particulate elemental composition.\n \nLight experiments  \n In order to quantify differences in growth and in the CO2- and N2-fixation\nrate capacities of these two isolates of C. watsonii, the investigators\nmeasured growth, CO2-fixation and gross and net N2-fixation rates, and\nparticulate carbon and nitrogen composition in response to a range of light\nintensities.\n \nGrowth rate and cell density estimates  \n Growth rate was determined as an increase in culture cell density over time\nwith the equation NT=N0e\\u00b5T, where N0 and NT are the initial and final\nculture cell densities, respectively, T is the time in days between culture\ncell density estimates, and \\u00b5 is the specific growth rate. Culture cell\ndensity was determined using a haemocytometer and an Olympus BX51 microscope.\nCell diameter was measured using an ocular micrometer calibrated with the same\nmicroscope. Growth rates were fitted to a Monod linear hyperbolic function of\nlight (Monod, 1949) using Sigma Plot 10 software program. The hyperbola was\nfit to the data without including the origin to yield the highest r2 value.\n \nN2 fixation  \n The acetylene reduction assay described by Capone et al. (1993) was used to\nestimate the gross N2-fixation rate. Rate measurements were initiated at the\nbeginning of the 12-h dark period, when C. watsonii is known to fix N2 (Mohr\net al., 2010a; Saito et al., 2011). Gross N2-fixation rates were calculated in\nthe same way as described in Garcia et al. (2011), using a Bunsen coefficient\nfor ethylene of 0.082 (Breitbarth et al., 2004) and an ethylene\nproduction:N2-fixation ratio of 3:1.\n \nNet N2-fixation rates were measured using the 15N2 isotope tracer method\n(Mulholland & Bernhardt, 2005; Mulholland et al., 2004). Samples were prepared\nthe same way as described in Garcia et al. (2011). Briefly, 169 ml of each\nexperimental replicate was inoculated with 169 \\u00b5l of 99% doubly labelled\n15N2 gas and incubated at 28 degrees C in complete darkness for 12 h during\nthe dark period. The incubation was then terminated by filtering the entire\nvolume onto precombusted (450 degree C, 4 h) GF/F filters for the analysis of\nparticulate 15N, total particulate N, and total particulate C. Filters were\ndried at 80\\u201390 degrees C, pelleted, and combusted in a quartz column with\nchromium oxide and silver wool at 1000 degrees C. For this analysis, ammonium\nsulphate and sucrose were used as standards. At the time the experiments were\nconducted, the investigators were not aware of the criticisms of the 15N2\nuptake method that have been discussed by Mohr et al. (2010b). Thus, for\nanother independent estimate of net N2 fixation, the investigators calculated\na particulate N (PN) accumulation rate in cultures over time (deltaPN =\nPNfinal - PNinitial). Particulate N was measured in subsamples of experimental\nreplicates that were incubated with 15N2 at the end of the dark period and\nused as the end-period PN measurement (PNfinal). Because only one sample of PN\nwas collected, the investigators back-calculated an estimate of PNinitial\nbased on their measurements of cellular growth rate using the equation: growth\nrate (d\\u20131) = [ln(PNfinal)\\u2013ln(PNinitial)]/(t2\\u2013t1), where t1 is\nthe initial time and t2 is the final time. Based on their measurements of\ngrowth rates, the investigators assumed that PN per cell was in a daily steady\nstate. The gross N2-fixation rate:PN-accumulation rate ratio (hereafter the\ngross:PN accumulation ratio) was then calculated and compared to the ratio of\ngross N2-fixation rate:net 15N2-fixation rate ratio (gross:net), which is a\nproxy for cellular N retention (Mulholland et al., 2004; Mulholland, 2007).\n \nCO2 fixation  \n The rate of CO2 fixation was determined as described in Garcia et al. (2011)\nusing the H14CO3- incorporation method. CO2-fixation rates were determined by\nfirst calculating the ratio of the radioactivity of 14C incorporated into\ncells during 24 hours to the total radioactivity of H14CO3\\u2013. This ratio\nwas then multiplied by the total CO2 concentration (TCO2). TCO2 concentrations\nwere measured in the CO2-light experiments and were applied to all experiments\nto calculate CO2-fixation rates for corresponding CO2 treatments. For the\nlight experiments, the investigators used a TCO2 value that was measured in\nthe present-day pCO2 treatments of the CO2-light experiments (2053 \\u00b5M\nTCO2).\n \nReferences:  \n BREITBARTH, E., MILLS, M.M., FRIEDRICHS, G. & LAROCHE, J. (2004). The Bunsen\ngas solubility coefficient of ethylene as a function of temperature and\nsalinity and its importance for nitrogen fixation assays. Limnology and\nOceanography: Methods, 2: 282\\u2013288. DOI:\n[10.4319/lom.2004.2.282](\\\\\"https://dx.doi.org/10.4319/lom.2004.2.282\\\\\")\n \nCHEN, Y.B., ZEHR, J.P. & MELLON, M. (1996). Growth and nitrogen fixation of\nthe diazotrophic filamentous nonheterocystous cyanobacterium Trichodesmium sp.\nIMS101 in defined media: Evidence for a circadian rhythm. Journal of\nPhycology, 32: 916-923. DOI:\n[10.1111/j.0022-3646.1996.00916.x](\\\\\"https://dx.doi.org/10.1111/j.0022-3646.1996.00916.x\\\\\")\n \nGarcia, N. S., F.-X. Fu, , C. L. Breene, P. W. Bernhardt, M. R. Mulholland, J.\nA. Sohm, and D. A. Hutchins. 2011. Interactive effects of irradiance and CO2\non CO2- and N2 fixation in the diazotroph Trichodesmium erythraeum\n(Cyanobacteria). J. Phycol. 47: 1292-1303.\nDOI:\\u00a0[10.1111/j.1529-8817.2011.01078.x](\\\\\"https://dx.doi.org/10.1111/j.1529-8817.2011.01078.x\\\\\")\n \nMONOD, J. (1949). The growth of bacterial cultures. Annual Review of\nMicrobiology, 3: 371\\u2013394.\n \nMorel, F. M. M., J. G. Rueter, D. M. Anderson, and Guillard, R. R. L. 1979.\nAquil: Chemically defined phytoplankton culture medium for trace metal\nstudies. J. Phycol. 15:135-141.\n \nMULHOLLAND, M.R. (2007). The fate of nitrogen fixed by diazotrophs in the\nocean. Biogeosciences 4: 37\\u201351. DOI:\n[10.5194/bg-4-37-2007](\\\\\"https://dx.doi.org/10.5194/bg-4-37-2007\\\\\")\n \nMULHOLLAND, M.R. & BERNHARDT, P.W. (2005). The effect of growth rate,\nphosphorus concentration and temperature on N2-fixation, carbon fixation, and\nnitrogen release in continuous cultures of Trichodesmium IMS101. Limnology and\nOceanography, 50: 839\\u2013849. DOI:\n[10.4319/lo.2005.50.3.0839](\\\\\"https://dx.doi.org/10.4319/lo.2005.50.3.0839\\\\\")\n \nMULHOLLAND, M.R., BRONK, D.A. & CAPONE, D.G. (2004). N2 fixation and\nregeneration of NH4+ and dissolved organic N by Trichodesmium IMS101. Aquatic\nMicrobial Ecology, 37: 85\\u201394. DOI:\n[10.3354/ame037085](\\\\\"https://dx.doi.org/10.3354/ame037085\\\\\")
attribute NC_GLOBAL awards_0_award_nid String 55189
attribute NC_GLOBAL awards_0_award_number String OCE-0722337
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0722337 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String David L. Garrison
attribute NC_GLOBAL awards_0_program_manager_nid String 50534
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String C. watsonii light experiments \n (Data published in Fig. 1 of Garcia et al. 2013 Eur. J. Phycology) \n PI: David Hutchins (USC) \n Contact: Fei-Xue Fu (USC) \n Version: 11 June 2013
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3  19 Dec 2019
attribute NC_GLOBAL date_created String 2013-06-10T18:40:44Z
attribute NC_GLOBAL date_modified String 2019-11-06T17:18:54Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.3962.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/3962 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Light Meter
attribute NC_GLOBAL instruments_0_dataset_instrument_description String During culturing, light was measured with a LI-250A light meter (LI-COR Biosciences, light sensor serial # SPQA 4020).
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 6180
attribute NC_GLOBAL instruments_0_description String Light meters are instruments that measure light intensity. Common units of measure for light intensity are umol/m2/s or uE/m2/s (micromoles per meter squared per second or microEinsteins per meter squared per second). (example: LI-COR 250A)
attribute NC_GLOBAL instruments_0_instrument_name String Light Meter
attribute NC_GLOBAL instruments_0_instrument_nid String 703
attribute NC_GLOBAL instruments_0_supplied_name String Light Meter
attribute NC_GLOBAL instruments_1_acronym String Hemocytometer
attribute NC_GLOBAL instruments_1_dataset_instrument_description String Culture cell density was determined using a haemocytometer and an Olympus BX51 microscope.
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 6181
attribute NC_GLOBAL instruments_1_description String A hemocytometer is a small glass chamber, resembling a thick microscope slide, used for determining the number of cells per unit volume of a suspension. Originally used for performing blood cell counts, a hemocytometer can be used to count a variety of cell types in the laboratory. Also spelled as \"haemocytometer\". Description from:\nhttp://hlsweb.dmu.ac.uk/ahs/elearning/RITA/Haem1/Haem1.html.
attribute NC_GLOBAL instruments_1_instrument_name String Hemocytometer
attribute NC_GLOBAL instruments_1_instrument_nid String 704
attribute NC_GLOBAL instruments_1_supplied_name String Hemocytometer
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, C_specific_CO2_fix, C_specific_CO2_fix_sd, carbon, carbon dioxide, cell, cell_diameter, cell_diameter_sd, chemical, co2, data, dataset, diameter, dioxide, dmo, erddap, fix, gross, gross_to_net_N2fix, gross_to_net_N2fix_sd, growth, growth_rate, growth_rate_sd, isolate, light, management, n2fix, N_specific_gross_N2_fix, N_specific_gross_N2_fix_sd, N_specific_net_15N2_fix, N_specific_net_15N2_fix_sd, net, oceanography, office, preliminary, rate, specific
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/3962/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/3962 (external link)
attribute NC_GLOBAL param_mapping String {'3962': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/3962/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of Southern California
attribute NC_GLOBAL people_0_affiliation_acronym String USC
attribute NC_GLOBAL people_0_person_name String David A. Hutchins
attribute NC_GLOBAL people_0_person_nid String 51048
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String University of Southern California
attribute NC_GLOBAL people_1_affiliation_acronym String USC
attribute NC_GLOBAL people_1_person_name String Fei-Xue Fu
attribute NC_GLOBAL people_1_person_nid String 51585
attribute NC_GLOBAL people_1_role String Contact
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL people_2_affiliation String University of Southern California
attribute NC_GLOBAL people_2_affiliation_acronym String USC
attribute NC_GLOBAL people_2_person_name String David A. Hutchins
attribute NC_GLOBAL people_2_person_nid String 51048
attribute NC_GLOBAL people_2_role String Contact
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL people_3_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_3_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_3_person_name String Shannon Rauch
attribute NC_GLOBAL people_3_person_nid String 51498
attribute NC_GLOBAL people_3_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_3_role_type String related
attribute NC_GLOBAL project String Diaz N2-Fix in High CO2
attribute NC_GLOBAL projects_0_acronym String Diaz N2-Fix in High CO2
attribute NC_GLOBAL projects_0_description String From NSF award abstract:\nThe importance of marine N2 fixation to present ocean productivity and global nutrient and carbon biogeochemistry is now universally recognized. Marine N2 fixation rates and oceanic N inventories are also thought to have varied over geological time due to climate variability and change. However, almost nothing is known about the responses of dominant N2 fixers in the ocean such as Trichodesmium and unicellular N2 fixing cyanobacteria to past, present and future global atmospheric CO2 regimes. Our preliminary data demonstrate that N2 and CO2 fixation rates, growth rates, and elemental ratios of Atlantic and Pacific Trichodesmium isolates are controlled by the ambient CO2 concentration at which they are grown. At projected year 2100 pCO2 (750 ppm), N2 fixation rates of both strains increased 35-100%, with simultaneous increases in C fixation rates and cellular N:P and C:P ratios.  Surprisingly, these increases in N2 and C fixation due to elevated CO2 were of similar relative magnitude regardless of the growth temperature or P availability. Thus, the influence of CO2 appears to be independent of other common growth-limiting factors.  Equally important, Trichodesmium growth and N2 fixation were completely halted at low pCO2 levels (150 ppm), suggesting that diazotrophy by this genus may have been marginal at best at last glacial maximum pCO2 levels of ~190 ppm. Genetic evidence indicates that Trichodesmium diazotrophy is subject to CO2 control because this cyanobacterium lacks high-affinity dissolved inorganic carbon transport capabilities. These findings may force a re-evaluation of the hypothesized role of past marine N2 fixation in glacial/interglacial climate changes, as well as consideration of the potential for increased ocean diazotrophy and altered nutrient and carbon cycling in the future high-CO2 ocean.\nWe propose an interdisciplinary project to examine the relationship between ocean N2 fixing cyanobacteria and changing pCO2. A combined field and laboratory approach will incorporate in situ measurements with experimental manipulations using natural and cultured populations of Trichodesmium and unicellular N2 fixers over range of pCO2 spanning glacial era to future concentrations (150-1500 ppm). We will also examine how effects of pCO2 on N2 and C fixation and elemental stoichiometry are moderated by the availability of other potentially growth-limiting variables such as Fe, P, temperature, and light. We plan to obtain a detailed picture of the full range of responses of important oceanic diazotrophs to changing pCO2, including growth rates, N2 and CO2 fixation, cellular elemental ratios, fixed N release, photosynthetic physiology, and expression of key genes involved in carbon and nitrogen acquisition at both the transcript and protein level.\nThis research has the potential to evolutionize our understanding of controls on N2 fixation in the ocean. Many of our current ideas about the interactions between oceanic N2 fixation, atmospheric CO2, nutrient biogeochemistry, ocean productivity, and global climate change may need revision to take into account previously unrecognized feedback mechanisms between atmospheric composition and diazotrophs. Our findings could thus have major implications for human society, and its increasing dependence on ocean resources in an uncertain future. This project will take the first vital steps towards understanding how a biogeochemically-critical process, the fixation of N2 in the ocean, may respond to our rapidly changing world during the century to come.
attribute NC_GLOBAL projects_0_end_date String 2012-12
attribute NC_GLOBAL projects_0_geolocation String Laboratory
attribute NC_GLOBAL projects_0_name String CO2 control of oceanic nitrogen fixation and carbon flow through diazotrophs
attribute NC_GLOBAL projects_0_project_nid String 2172
attribute NC_GLOBAL projects_0_start_date String 2007-05
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Results of laboratory experiment examining growth, CO2- and N2-fixation of Crocosphaera watsonii isolates in differing light intensities; conducted in the Hutchins Laboratory, USC.
attribute NC_GLOBAL title String Results of laboratory experiment examining growth, CO2- and N2-fixation of Crocosphaera watsonii isolates in differing light intensities; conducted in the Hutchins Laboratory, USC
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable isolate String
attribute isolate bcodmo_name String taxon
attribute isolate description String Name of Crocosphaera watsonii isolate.
attribute isolate long_name String Isolate
attribute isolate units String text
variable light short
attribute light _FillValue short 32767
attribute light actual_range short 18, 300
attribute light bcodmo_name String irradiance
attribute light description String Light intensity. (For more about light measurement see: Australian National Algae Culture Collection and Plant Physiology Online.)
attribute light long_name String Light
attribute light nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/VSRW/ (external link)
attribute light units String micromoles quanta per square meter per second (umol quanta m-2 s-1)
variable growth_rate float
attribute growth_rate _FillValue float NaN
attribute growth_rate actual_range float 0.0762, 0.8141
attribute growth_rate bcodmo_name String unknown
attribute growth_rate description String Growth rate.
attribute growth_rate long_name String Growth Rate
attribute growth_rate units String per day
variable growth_rate_sd float
attribute growth_rate_sd _FillValue float NaN
attribute growth_rate_sd actual_range float 0.00301, 0.0379
attribute growth_rate_sd bcodmo_name String standard deviation
attribute growth_rate_sd colorBarMaximum double 50.0
attribute growth_rate_sd colorBarMinimum double 0.0
attribute growth_rate_sd description String Standard deviation of growth rate.
attribute growth_rate_sd long_name String Growth Rate Sd
attribute growth_rate_sd units String per day
variable cell_diameter float
attribute cell_diameter _FillValue float NaN
attribute cell_diameter actual_range float 2.28, 5.7317
attribute cell_diameter bcodmo_name String unknown
attribute cell_diameter description String Cell diamter in micrometers.
attribute cell_diameter long_name String Cell Diameter
attribute cell_diameter units String micrometers (um)
variable cell_diameter_sd float
attribute cell_diameter_sd _FillValue float NaN
attribute cell_diameter_sd actual_range float 0.0438, 0.1932
attribute cell_diameter_sd bcodmo_name String standard deviation
attribute cell_diameter_sd colorBarMaximum double 50.0
attribute cell_diameter_sd colorBarMinimum double 0.0
attribute cell_diameter_sd description String Standard deviation of cell diameter.
attribute cell_diameter_sd long_name String Cell Diameter Sd
attribute cell_diameter_sd units String micrometers (um)
variable C_specific_CO2_fix float
attribute C_specific_CO2_fix _FillValue float NaN
attribute C_specific_CO2_fix actual_range float 8.03E-4, 0.0242
attribute C_specific_CO2_fix bcodmo_name String unknown
attribute C_specific_CO2_fix description String C-specific CO2 fixation.
attribute C_specific_CO2_fix long_name String C Specific CO2 Fix
attribute C_specific_CO2_fix units String per hour
variable C_specific_CO2_fix_sd float
attribute C_specific_CO2_fix_sd _FillValue float NaN
attribute C_specific_CO2_fix_sd actual_range float 4.19E-5, 0.00344
attribute C_specific_CO2_fix_sd bcodmo_name String standard deviation
attribute C_specific_CO2_fix_sd colorBarMaximum double 50.0
attribute C_specific_CO2_fix_sd colorBarMinimum double 0.0
attribute C_specific_CO2_fix_sd description String Standard deviation of C-specific CO2 fixation.
attribute C_specific_CO2_fix_sd long_name String C Specific CO2 Fix Sd
attribute C_specific_CO2_fix_sd units String per hour
variable N_specific_gross_N2_fix float
attribute N_specific_gross_N2_fix _FillValue float NaN
attribute N_specific_gross_N2_fix actual_range float 0.00973, 0.0451
attribute N_specific_gross_N2_fix bcodmo_name String unknown
attribute N_specific_gross_N2_fix description String N-specific gross N2 fixation.
attribute N_specific_gross_N2_fix long_name String N Specific Gross N2 Fix
attribute N_specific_gross_N2_fix units String per hour
variable N_specific_gross_N2_fix_sd float
attribute N_specific_gross_N2_fix_sd _FillValue float NaN
attribute N_specific_gross_N2_fix_sd actual_range float 8.61E-5, 0.00527
attribute N_specific_gross_N2_fix_sd bcodmo_name String standard deviation
attribute N_specific_gross_N2_fix_sd colorBarMaximum double 50.0
attribute N_specific_gross_N2_fix_sd colorBarMinimum double 0.0
attribute N_specific_gross_N2_fix_sd description String Standard deviation of N-specific gross N2 fixation.
attribute N_specific_gross_N2_fix_sd long_name String N Specific Gross N2 Fix Sd
attribute N_specific_gross_N2_fix_sd units String per hour
variable N_specific_net_15N2_fix float
attribute N_specific_net_15N2_fix _FillValue float NaN
attribute N_specific_net_15N2_fix actual_range float 8.84E-6, 0.0169
attribute N_specific_net_15N2_fix bcodmo_name String unknown
attribute N_specific_net_15N2_fix description String N-specific net 15N2 fixation.
attribute N_specific_net_15N2_fix long_name String N Specific Net 15 N2 Fix
attribute N_specific_net_15N2_fix units String per hour
variable N_specific_net_15N2_fix_sd float
attribute N_specific_net_15N2_fix_sd _FillValue float NaN
attribute N_specific_net_15N2_fix_sd actual_range float 4.13E-6, 0.00219
attribute N_specific_net_15N2_fix_sd bcodmo_name String standard deviation
attribute N_specific_net_15N2_fix_sd colorBarMaximum double 50.0
attribute N_specific_net_15N2_fix_sd colorBarMinimum double 0.0
attribute N_specific_net_15N2_fix_sd description String Standard deviation of N-specific net N2 fixation.
attribute N_specific_net_15N2_fix_sd long_name String N Specific Net 15 N2 Fix Sd
attribute N_specific_net_15N2_fix_sd units String per hour
variable gross_to_net_N2fix float
attribute gross_to_net_N2fix _FillValue float NaN
attribute gross_to_net_N2fix actual_range float 2.3955, 15.7753
attribute gross_to_net_N2fix bcodmo_name String unknown
attribute gross_to_net_N2fix description String Ratio of gross N2 fixation to net 15N2 fixation.
attribute gross_to_net_N2fix long_name String Gross To Net N2fix
attribute gross_to_net_N2fix units String ratio
variable gross_to_net_N2fix_sd float
attribute gross_to_net_N2fix_sd _FillValue float NaN
attribute gross_to_net_N2fix_sd actual_range float 0.075, 2.1655
attribute gross_to_net_N2fix_sd bcodmo_name String standard deviation
attribute gross_to_net_N2fix_sd colorBarMaximum double 50.0
attribute gross_to_net_N2fix_sd colorBarMinimum double 0.0
attribute gross_to_net_N2fix_sd description String Standard deviation of the ratio of gross N2 fixation to net 15N2 fixation.
attribute gross_to_net_N2fix_sd long_name String Gross To Net N2fix Sd
attribute gross_to_net_N2fix_sd units String ratio

 
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