| Contributors | Affiliation | Role |
|---|---|---|
| Van Mooy, Benjamin A.S. | Woods Hole Oceanographic Institution (WHOI) | Principal Investigator |
| Dyhrman, Sonya T. | Lamont-Doherty Earth Observatory (LDEO) | Co-Principal Investigator |
| Rauch, Shannon | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
| File |
|---|
CTD.csv (Comma Separated Values (.csv), 7.87 MB) MD5:1700128a417c22542d0ea856b104b759 Primary data file for dataset ID 616342 |
| Parameter | Description | Units |
| cast | CTD cast number. | integer |
| station | Station number. | integer |
| lat | Latitude. Positive values = North. | decimal degrees |
| lon | Longitude. Negative values = West. | decimal degrees |
| date | Year, month, and day of CTD cast (UTC). | YYYYmmdd |
| time | Time, in hours, minutes, and seconds, of CTD cast (UTC). | HHMMSS |
| ISO_DateTime_UTC | Date and time (UTC) formatted to ISO 8601 standard. | YYYY-mm-ddTHH:MM:SS.xx |
| press | Pressure, Digiquartz. | decibars (db) |
| depth | Sample depth. | meters (m) |
| cond | Conductivity. | Siemens per meter (S/m) |
| cond2 | Secondary conductivity. | Siemens per meter (S/m) |
| temp | Temperature. | degrees Celsius |
| temp2 | Secondary temperature. | degrees Celsius |
| sal | Salinity, Practical. | practical salinity units (PSU) |
| sal2 | Secondary salinity, practical. | practical salinity units (PSU) |
| sal3 | Salinity, Practical. | practical salinity units (PSU) |
| density | Density. | kilograms per cubic meter (kg/m^3) |
| N2_sat | Nitrogen saturation. | milliliters per liter (mL/L) |
| potemp | Potential temperature. | degrees Celsius |
| O2 | Oxygen, SBE 43. | milliliters per liter (mL/L) |
| O2_sat_mLL_GG | Oxygen Saturation, Garcia & Gordon. | milliliters per liter (mL/L) |
| O2_sat_mLL_W | Oxygen Saturation, Weiss. | milliliters per liter (mL/L) |
| O2_sat_umolkg_W | Oxygen Saturation, Weiss. | micromoles per kilogram (umol/kg) |
| PAR | PAR/Irradiance, Biospherical/Licor | ? |
| time_elapsed | Time elapsed. | seconds |
| altimeter | Altimeter. | meters (m) |
| voltage0 | Voltage 0. | volts |
| voltage1 | Voltage 1. | volts |
| flag | Flag | dimensionless |
| Website | |
| Platform | R/V Atlantic Explorer |
| Start Date | 2014-05-08 |
| End Date | 2014-05-26 |
| Description | May 2014 cruise conducted as part of the "Dissolved Phosphorus Processing by Trichodesmium Consortia: Quantitative Partitioning, Role of Microbial Coordination, and Impact on Nitrogen Fixation" project. |
Description from NSF award abstract:
Colonies of the cyanbacterium Trichodesmium are responsible for a large fraction of N2 fixation in nutrient-poor, open-ocean ecosystems, ultimately fueling primary production in both Trichodesmium and in the broader planktonic community. However, in some parts of the ocean, the scarcity of dissolved phosphorus limits rates of Trichodesmium N2 fixation. Trichodesmium colonies employ an arsenal of strategies to mitigate the effects of phosphorus limitation, and the consortia of epibiotic bacteria in the colonies may play a significant role in phosphorus acquisition.
In this study, researchers from Woods Hole Oceanographic Institution and Columbia University will use metagenomic and metatranscriptomic sequencing to investigate how phosphorus metabolism is coordinated in Trichodesmium consortia, and to discern the role of quorum sensing in phosphorus acquisition and partitioning. Results from this study are expected to expand understanding of Trichodesmium from a monospecific colony whose primary function is fixing CO2 and N2 toward a unique planktonic consortium with a diverse, complex, and highly coordinated overall metabolism that exerts profound control over the cycling of inorganic and organic nutrients in the oligotrophic upper ocean.
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) |