CTD Station Locations from R/V Kilo Moana, R/V Seward Johnson KM0703, SJ0609 in the tropical and subtropical Southwest Pacific, and tropical North Atlantic from 2006-2007 (DIAZOTROPHS project)

Website: https://www.bco-dmo.org/dataset/3266
Version: 16Nov2009
Version Date: 2009-11-16

Project
» Biology and Ecology of Newly Discovered Diazotrophs in the Open Ocean (DIAZOTROPHS)
ContributorsAffiliationRole
Zehr, Jonathan P.University of California-Santa Cruz (UCSC)Principal Investigator
Church, Matthew J.University of Hawaii at Manoa (SOEST)Co-Principal Investigator
Montoya, JosephGeorgia Institute of Technology (GA Tech)Co-Principal Investigator
Gegg, Stephen R.Woods Hole Oceanographic Institution (WHOI)BCO-DMO Data Manager


Dataset Description

DIAZOTROPHS - CTD Station Locations


Methods & Sampling

Generated from CTD profile files


Data Processing Description

Generated from CTD profile files


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Data Files

File
CTD_Stations.csv
(Comma Separated Values (.csv), 3.07 KB)
MD5:e4c56107b413f69f4ff2b59f2052393a
Primary data file for dataset ID 3266

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Parameters

ParameterDescriptionUnits
CruiseCruise Id text
StationStation Id (Station number.Cast number at station) nn.xx
datedate sampling began YYYYMMDD
timetime sampling began hhmm
lonlongitude; negative denotes West decimal degrees
latlatitude; negative denotes South decimal degrees

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Deployments

KM0703

Website
Platform
R/V Kilo Moana
Report
Start Date
2007-03-14
End Date
2007-04-18
Description
The cruise began in Townsville, Australia and sampled the Coral Sea, a transect southward toward the Tasman Sea, and a transect northward toward New Caledonia, with twelve hydrostations (001-012). It then made a run eastward to 170 deg W, a northward run to 15 deg S, then a transect to the east before ending in Suva, Fiji after carrying out fourteen stations (013-026). Cruise information and original data are available from the NSF R2R data catalog.

Methods & Sampling
Generated from CTD profile file

Processing Description
Generated from CTD profile file

SJ0609

Website
Platform
R/V Seward Johnson
Start Date
2006-06-18
End Date
2006-07-31
Description
Leg 1 of the cruise began in Ft. Pierce FL with a rapid transit to Bridgetown, Barbados and two hydrostations (001-002) en route. Leg 2 extended from Barbados to Mindelo, Cape Verde, with nine hydrostations (003-010, 012). Leg 3 included a run south to the equator, then northwestward to Barbados with eleven hydrostations (013-023).

Methods & Sampling
Generated from CTD profiles

Processing Description
Generated from CTD profiles


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Project Information

Biology and Ecology of Newly Discovered Diazotrophs in the Open Ocean (DIAZOTROPHS)

Coverage: Tropical and Subtropical Southwest Pacific and tropical North Atlantic


Biology and Ecology of Newly Discovered Diazotrophs in the Open Ocean

The productivity of the oceans is limited by the availability of nutrients,

which has implications for the fluxes of carbon between the atmosphere and

oceans. In a previous award the PIs found that previously unrecognized

N2-fixing unicellular cyanobacteria are active and abundant in oligotrophic

oceans. This finding has important implications for nitrogen cycling in the

oceans and for the role of "new" nitrogen in carbon fixation.



The PIs will address three major issues:

First, there are at least two distinct groups of cyanobacteria that appear

to be separated in space and time, due to unknown ecological variables.



Second, the geographic distribution and factors controlling the distribution

are unknown, so it is not clear how these organisms should be included in

biogeochemical models.



Finally, one of the groups of cyanobacteria appears to fix N2 during the day,

which revives the enigma of simultaneous nitrogen fixation and photosynthesis

that was previously limited to discussions of Trichodesmium.




PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

Burns, J.A., Zehr, J.P., Montoya, J P, Kustka, A.B., and Capone, D. G.. "Effect of

EDTA addtiions on natural Trichodesmium spp. (CYANOPHYTA) populations," Journal of

Phycology, v.42, 2006, p. 900.



Campbell, L, E.J. Carpenter, J.P. Montoya, A.B. Kustka, D.G. Capone. "Picoplankton

community structure within and outside a Trichodesmium bloom in the southwestern

Pacific Ocean," Vie et Milieu, v.55, 2005, p. 185.



Capone, D.G., J.A. Burns, J.P. Montoya, A. Subramaniam, C. Mahaffey, T. Gunderson,

A.F. Michaels, and E.J. Carpenter. "Nitrogen fixation by Trichodesmium spp.: An

important source of new nitrogen to the tropica and subtropical North Atlantic

Ocean," Global Biogeochemical Cycles, v.19, 2005, p. doi:10.10.



Holl, C.M. & J.P. Montoya. "Interactions between nitrate uptake and nitrogen fixation

continuous cultures of the marine diazotroph Trichodesmium (Cyanophyta)," Journal of

Phycology, v.41, 2005, p. 1178.



Holl, C.M., T.A. Villareal, C.D. Payne, T.D. Clayton, C. Hart, J.P. Montoya.

"Trichodesmium in the western Gulf of Mexico: 15N2-fixation and natural abundance

stable isotope evidence," Limnology and Oceanography, v.52, 2007, p. 2249.



Holl, C.M., Waite, A.M., Pesant, S., Thompson, P, Montoya, J P. "Unicellular diazotrophy

as a source of nitrogen to Leeuwin Current coastal eddies," Deep-Sea Research I,

v.54, 2007, p. 1045.



Krauk, J.M, T.A. Villareal, J.A. Sohm, J.P. Montoya, and D.G. Capone. "Plasticity

of N:P ratios in laboratory and field populations of Trichodesmium spp.," Aquatic

Microbial Ecology, v.72, 2006, p. 243.



Montoya, J P, Holl, C.M., Zehr, J.P., Hansen, A., Villareal, T.A., Capone, D.G..

"High rates of N2-fixation by unicellular diazotrophs in the oligotrophic Pacific,"

Nature, v.430, 2004, p. 1027.



Montoya, J.P., M. Voss, and D.G. Capone. "Spatial variation in N2-fixation rate

and diazotroph activity in the Tropical Atlantic," Biogeosciences, v.4, 2007, p. 396.



Subramaniam, A, P.L. Yager, E.J. Carpenter, C. Mahaffey, K. Bjorkman, S. Cooley,

A. Kustka, J.P. Montoya, A. SaƱudo-Wilhelmy, R. Shipe, and D.G. Capone. "Amazon River

enhances diazotrophy and carbon sequestration in the tropical North Atlantic Ocean,"

Proc. Natl. Acad. Sci, v.105, 2008, p. 10460.



Waite, AM; Muhling, BA; Holl, CM; Beckley, LE; Montoya, JP; Strzelecki, J; Thompson, PA;

Pesant, S. "Food web structure in two counter-rotating eddies based on delta N-15 and

delta C-13 isotopic analyses," DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,

v.54, 2007, p. 1055-1075. View record at Web of Science




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Funding

Funding SourceAward
Gordon and Betty Moore Foundation (GBMF)
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)

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