Bacterial protein production on particles obtained by gravity filtration of water collected on R/V Endeavor EN556 (Patterns of activities project) from 2015-04-27 to 2015-05-02 (NCEI Accession 0278168)
This dataset contains biological and physical data collected on R/V Endeavor during cruise EN556 from 2015-04-27 to 2015-05-02. These data include depth, leucine incorporation rate, salinity calculated from CTD primary sensors, and water temperature. The instruments used to collect these data include Centrifuge, Liquid Scintillation Counter, Niskin bottle, and Shipboard Incubator. These data were collected by Carol Arnosti of University of North Carolina at Chapel Hill as part of the "Latitudinal and depth-related contrasts in enzymatic capabilities of pelagic microbial communities: Predictable patterns in the ocean? (Patterns of activities)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2020-05-13.
The following is the text of the dataset description provided by BCO-DMO:
Bacterial protein production from gravity filtered seawater, EN556
Dataset Description:
Experiments on (operationally defined) particles were carried out by gravity-filtering water through 3 um pore size filters. Bacterial protein production was measured from 3 H-leucine incorporation by heterotrophic bacteria.
See Niskin Bottle and Cast List EN556 to link specific casts and bottles to each experiment: https://www.bco-dmo.org/dataset/717427 .
The following is the text of the dataset description provided by BCO-DMO:
Bacterial protein production from gravity filtered seawater, EN556
Dataset Description:
Experiments on (operationally defined) particles were carried out by gravity-filtering water through 3 um pore size filters. Bacterial protein production was measured from 3 H-leucine incorporation by heterotrophic bacteria.
See Niskin Bottle and Cast List EN556 to link specific casts and bottles to each experiment: https://www.bco-dmo.org/dataset/717427 .
Dataset Citation
- Cite as: Arnosti, Carol (2023). Bacterial protein production on particles obtained by gravity filtration of water collected on R/V Endeavor EN556 (Patterns of activities project) from 2015-04-27 to 2015-05-02 (NCEI Accession 0278168). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0278168. Accessed [date].
Dataset Identifiers
ISO 19115-2 Metadata
gov.noaa.nodc:0278168
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor |
NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov |
Dataset Point of Contact |
NOAA National Centers for Environmental Information ncei.info@noaa.gov |
Time Period | 2015-04-27 to 2015-05-02 |
Spatial Bounding Box Coordinates |
West: 68.4
East: 71.005
South: 37.604
North: 40.07
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns |
Dataset Progress Status | Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility |
Data Update Frequency | As needed |
Supplemental Information | Acquisition Description: Seawater was transferred to 20 L carboys that were rinsed three times with water from the sampling depth. Experiments on (operationally defined) particles were carried out by gravity-filtering water through 3 um pore size filters. Fractions of the filters (1/8 of each filter) was incubated in autoclaved seawater from the same depth/station; bacterial protein production was calculated to account for the volume of seawater that had passed through the filter. Bacterial protein production was measured from 3H-leucine incorporation by heterotrophic bacteria using the cold trichloroacetic acid (TCA) and microcentrifuge extraction method [as in Kirchman, 2001]. All work was performed aboard ship. In brief, triplicate live samples of 1.5 mL seawater as well as one 100% (w/v) TCA-killed control were incubated with 23 uL of L-[3,4,5-3H(N)]-Leucine (PerkinElmer, NET460250UC) for between 4 and 24 hours in the dark at as close to in situ temperature as possible. Live samples were then killed with 89 uL of 100% (w/v) TCA and centrifuged (10,000 rpm at 4°C for 10 min) to pelletize cell material. The supernatant liquid was removed and 1 mL of 5% (w/v) TCA solution was added, followed by vortex mixing and centrifugation. Supernatant removal, mixing, and centrifugation were repeated using 1 mL of 80% ethanol solution. Finally, the supernatant liquid was removed and each sample was dried overnight. After drying, 1 mL of scintillation cocktail (ScintiSafe 30% Cocktail, Fisher SX23-5) was added and incorporated radioactivity was measured using an LSA scintillation counter (PerkinElmer Tri-Carb 2910TR). Leucine incorporation rate was calculated from the incorporated radioactivity, compared to 1 mL of scintillation cocktail spiked with 23 uL of L-[3,4,5-3H(N)]-Leucine radioactivity, divided by incubation time. |
Purpose | This dataset is available to the public for a wide variety of uses including scientific research and analysis. |
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Last Modified: 2024-05-31T15:15:28Z
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov