http://lod.bco-dmo.org/id/dataset/886299
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2023-01-04
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Prochlorococcus cell concentrations during the BiG-RAPA expedition (Cruise MV1015) in the Peru Current and Eastern South Pacific Subtropical Gyre between November and December of 2010
2023-01-30
publication
2023-01-30
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2023-01-30
publication
https://doi.org/10.26008/1912/bco-dmo.886299.1
Sallie W. Chisholm
Massachusetts Institute of Technology
principalInvestigator
Jessica Berta-Thompson
Massachusetts Institute of Technology
principalInvestigator
Paul Berube
Massachusetts Institute of Technology
principalInvestigator
Allison Coe
Massachusetts Institute of Technology
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Berube, P., Berta-Thompson, J., Coe, A., Chisholm, S. W. (2023) Prochlorococcus cell concentrations during the BiG-RAPA expedition (Cruise MV1015) in the Peru Current and Eastern South Pacific Subtropical Gyre between November and December of 2010. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-01-30 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.886299.1 [access date]
Methods and Sampling: <p>These data include Prochlorococcus cell concentrations from samples collected during the&nbsp;C-MORE Biogeochemical Gradients Role in Arranging Planktonic Assemblages (BiG-RAPA) expedition (Cruise MV1015) in the Peru Current and Eastern South Pacific Subtropical Gyre between dates 2010-11-19 and 2010-12-10 along a zonal transect from the northern coast of Chile to the island of Rapa Nui.</p>
<p><strong>Seawater Collection: </strong>&nbsp;For both flow cytometry and qPCR samples, 500 milliliters (mL) of seawater from each depth was collected in a clean HDPE bottle (10% bleach for 20 minutes, followed by thorough rinsing with ship's tap water).&nbsp;Each clean HDPE bottle was rinsed 3 times with seawater from the Niskin bottle before filling.</p>
<p><strong>Flow Cytometry: &nbsp;</strong>For each of the 7 stations along the transect, 9 samples were collected across the euphotic zone; from these, water samples were also collected for ecotype qPCR. Depths at each station were chosen based on the location of the deep chlorophyll maximum, the mixed layer depth, and light attenuation profiles. At station 7, samples were also collected from high-resolution deep-chlorophyll maximum casts (63 and 69), and counts for these are included.&nbsp;Fixed samples for flow cytometry were prepared by adding 5 microliters (ul) of 25% glutaraldehyde to 1 mL whole seawater, mixing, and allowing the sample to fix in the dark for 10 minutes, followed by flash freezing in liquid nitrogen. The samples were stored in liquid nitrogen or at -80C for 2-4 months before running flow cytometry. Two or three flow cytometry samples were preserved from each Niskin sampled, but only one of these sampling replicates was run.&nbsp;For each site and depth collected, a sample was run on a BD/Cytopeia Influx flow cytometer with 488 and 457 lasers both illuminating the sample and 2 um fluorescent bead standards mixed in. No stains were used. Detector sensitivity ranges were optimized for Prochlorococcus and held constant throughout all runs. Each sample was thawed in the dark and run twice (flow cytometry technical duplicates). Replicates were run back to back, flushing the lines in between, so that samples weren't left thawed for longer than 1 hour or put through extra freeze-thaw cycles. Values in the table are averages of the pair of technical duplicates. &nbsp;As measurements, these values are good to ~2-3 significant digits (depending on the length of time a sample was run and the number of Prochlorococcus cells actually detected).</p>
<p><strong>Ecotype quantitative PCR: &nbsp;</strong>Samples for qPCR were collected and preserved as described &nbsp;(Zinser et al., 2006). 100 milliliters (mL) of seawater was filtered onto 25 millimeter (mm) diameter, 0.2 micrometer (um) pore size, polycarbonate filters (in triplicate) and chased with 3 mL of preservation solution (10 millimolar (mM) Tris pH=8, 100 mM EDTA, 500 mM NaCl). &nbsp;Filters were placed dry inside 2 mL screw cap polypropylene bead beater tubes and stored at -80 degress C until use.&nbsp;DNA from field samples was extracted from filters as previously described (Zinser et al., 2006). Cells were resuspended by adding 650 microliters (uL) of 10 mM Tris pH=8 to the bead beater tube containing the filter and bead beated at maximum speed (~4800 rpm) for 2 minutes. 500 uL of the respuspended cells were transfered to a 1.5 mL centrifuge tube and the cells were heat lysed at 95 degrees C for 15 minutes. DNA samples were then stored at -80 degrees C until analysis.</p>
<p>The qPCR assay was performed as previously described (Ahlgren et al., 2006; Zinser et al., 2006; Malmstrom et al., 2010; Malmstrom et al., 2012) using the same standards and reaction conditions. Technical duplicates of three replicate filters were analyzed for BiG RAPA (i.e. 6 data points per sample). Data quality was assessed using the percent coefficient of variation for the 6 data points. When cell concentrations fell below the detection limit of the assay (indicated by the associated quality flag), cell concentrations were set to the theoretical detection limit of 0.65 cells/mL.</p>
<p>General Issue: &nbsp;In most cases these water samples are not from the same bottles or depths as cruise core measurement casts.&nbsp;</p>
<p>Flow Cytometry: &nbsp;At station 1, the mixed layer samples do not have technical replicates. In the first few attempted flow cytometry runs Prochlorococcus cells were not visible - not because their fluorescence was low (these waters are relatively turbid), but because the cells were scarce. Later, the remainders of these samples were used for single, long slow runs, and we were able to detect a small Prochlorococcus population - these counts are not robust, representing small numbers with background noise, but they round out the depth profile for a rough idea.</p>
<p>Field samples were collected by Jessie Berta-Thompson and Paul Berube, flow cytometry data were collected and analyzed by Jessie Berta-Thompson and Allison Coe, and quantitative PCR data were collected and analyzed by Allison Coe and Paul Berube.</p>
<p>ProChl values were calculated by normalizing chlorophyll fluorescence of the target population to chlorophyll fluorescence of the standard in the following manner: the mean of red fluorescence (680 nm emmission wavelength) for the gated Prochlorococcus was divided by the mean of red fluorescence (680 nm emmission wavelength) for the gated fluorescent bead standard.</p>
<p>ProFSC values were calculated by normalizing forward scatter of the target population to forward scatter of the standard in the following manner: the mean of forward scatter for the gated Prochlorococcus was divided by the mean of forward scatter for the gated fluorescent bead standard.</p>
<p><strong>QUALITY FLAGS column header = variable[QUALITY]</strong><br />
0 = Less than detection limit<br />
1 = Good data<br />
2 = Single measurement - no assessment of measurement variation<br />
3 = &gt;5% difference of techinical duplicates (flow cytometry)<br />
4 = &gt;50 %CV (ecotype qPCR)</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
Funding provided by NSF Division of Biological Infrastructure (NSF DBI) Award Number: DBI-0424599 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0424599
completed
Sallie W. Chisholm
Massachusetts Institute of Technology
(617) 253 1771
48-419 Department of Civil and Environmental Engineering 15 Vassar Street
Cambridge
MA
02139-4307
USA
chisholm@mit.edu
pointOfContact
Jessica Berta-Thompson
Massachusetts Institute of Technology
jbertathompson@gmail.com
pointOfContact
Paul Berube
Massachusetts Institute of Technology
77 Massachusetts Avenue Bldg 48-424
Cambridge
MA
02139
USA
pmberube@mit.edu
pointOfContact
Allison Coe
Massachusetts Institute of Technology
a_coe@mit.edu
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Station
Cast
Bottle
botid_number
ISO_DateTime_UTC
Latitude
Longitude
Depth
Prochlorococcus
Prochlorococcus_quality
ProChl
ProFSC
eMIT9312
eMIT9312_quality
eMED4
eMED4_quality
HLIII
HLIII_quality
HLIV
HLIV_quality
eNATL2A
eNATL2A_quality
eMIT9313
eMIT9313_quality
Influx Cell Sorter (BD Biosciences and Cytopeia)
LightCycler 480 System (Roche Applied Science, Indianapolis, Indiana)
theme
None, User defined
station id
cast
bottle
Niskin bottle number
ISO_DateTime_UTC
latitude
longitude
depth
prochlorococcus abundance
quality flag
chlorophyll-a; fluorometric method
No BCO-DMO term
cell_concentration
featureType
BCO-DMO Standard Parameters
Automated Cell Counter
dPCR
instrument
BCO-DMO Standard Instruments
MV1015
service
Deployment Activity
South Pacific from Arica, Chile to Easter Island.
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Center for Microbial Oceanography: Research and Education
http://cmore.soest.hawaii.edu/
Center for Microbial Oceanography: Research and Education
<h3>Project summary</h3>
<p>The <strong>Center for Microbial Oceanography: Research and Education</strong> (C-MORE) is a recently established (August 2006; NSF award: EF-0424599) NSF-sponsored Science and Technology Center designed to facilitate a more comprehensive understanding of the diverse assemblages of microorganisms in the sea, ranging from the genetic basis of marine microbial biogeochemistry including the metabolic regulation and environmental controls of gene expression, to the processes that underpin the fluxes of carbon, related bioelements and energy in the marine environment. Stated holistically, C-MORE's primary mission is: <em>Linking Genomes to Biomes</em>.</p>
<p>We believe that the time is right to address several major, long-standing questions in microbial oceanography. Recent advances in the application of molecular techniques have provided an unprecedented view of the structure, diversity and possible function of sea microbes. By combining these and other novel approaches with more well-established techniques in microbiology, oceanography and ecology, it may be possible to develop a meaningful predictive understanding of the ocean with respect to energy transduction, carbon sequestration, bioelement cycling and the probable response of marine ecosystems to global environmental variability and climate change. The strength of C-MORE resides in the synergy created by bringing together experts who traditionally have not worked together and this, in turn, will facilitate the creation and dissemination of new knowledge on the role of marine microbes in global habitability.</p>
<p>The new Center will design and conduct novel research, broker partnerships, increase diversity of human resources, implement education and outreach programs, and utilize comprehensive information about microbial life in the sea. The Center will bring together teams of scientists, educators and community members who otherwise do not have an opportunity to communicate, collaborate or design creative solutions to long-term ecosystem scale problems. The Center's research will be organized around four interconnected themes:</p>
<ul>
<li>(Theme I) microbial biodiversity,</li>
<li>(Theme II) metabolism and C-N-P-energy flow,</li>
<li>(Theme III) remote and continuous sensing and links to climate variability, and</li>
<li>(Theme IV) ecosystem modeling, simulation and prediction.</li>
</ul>
<p> Each theme will have a leader to help coordinate the research programs and to facilitate interactions among the other related themes. The education programs will focus on pre-college curriculum enhancements, in service teacher training and formal undergraduate/graduate and post-doctoral programs to prepare the next generation of microbial oceanographers. The Center will establish and maintain creative outreach programs to help diffuse the new knowledge gained into society at large including policymakers. The Center's activities will be dispersed among five partner institutions:</p>
<ul>
<li>Massachusetts Institute of Technology,</li>
<li>Woods Hole Oceanographic Institution,</li>
<li>Monterey Bay Aquarium Research Institute,</li>
<li>University of California at Santa Cruz and</li>
<li>Oregon State University</li>
</ul>
<p>and will be coordinated at the University of Hawaii at Manoa.</p>
<h4>Related Files:</h4>
<p><a href="http://bcodata.whoi.edu/C-MORE/C-MORE_SIP_ver_09-01-2008.pdf">Strategic plan (PDF file)</a></p>
C-MORE
largerWorkCitation
project
eng; USA
oceans
South Pacific from Arica, Chile to Easter Island.
-103.961
-70.7997
-26.249
-20.0834
2010-11-19
2010-12-10
North Pacific Subtropical Gyre (large region around 22 45 N, 158 W)
0
BCO-DMO catalogue of parameters from Prochlorococcus cell concentrations during the BiG-RAPA expedition (Cruise MV1015) in the Peru Current and Eastern South Pacific Subtropical Gyre between November and December of 2010
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/886452.rdf
Name: Station
Units: unitless
Description: <p>Station ID number</p>
http://lod.bco-dmo.org/id/dataset-parameter/886453.rdf
Name: Cast
Units: unitless
Description: <p>CTD cast ID number</p>
http://lod.bco-dmo.org/id/dataset-parameter/886454.rdf
Name: Bottle
Units: unitless
Description: <p>Niskin bottle number</p>
http://lod.bco-dmo.org/id/dataset-parameter/886455.rdf
Name: botid_number
Units: unitless
Description: <p>Niskin bottle ID in format AABBBCCCDD where AA=cruise; BBB=station; CCC=cast; DD=niskin bottle</p>
http://lod.bco-dmo.org/id/dataset-parameter/886456.rdf
Name: ISO_DateTime_UTC
Units: unitless
Description: <p>Sample collection timestamp (UTC) in ISO 8601 format yyyy-mm-ddTHH:MM:SSZ</p>
http://lod.bco-dmo.org/id/dataset-parameter/886457.rdf
Name: Latitude
Units: decimal degrees
Description: <p>latitude of study site North (South is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/886458.rdf
Name: Longitude
Units: decimal degrees
Description: <p>latitude of study site East (West is negative)</p>
http://lod.bco-dmo.org/id/dataset-parameter/886459.rdf
Name: Depth
Units: meters (m)
Description: <p>Sample collection depth relative to sea furface</p>
http://lod.bco-dmo.org/id/dataset-parameter/886460.rdf
Name: Prochlorococcus
Units: cells ml-1
Description: <p>Prochlorococcus cell concentration based on flow cytometry counts</p>
http://lod.bco-dmo.org/id/dataset-parameter/886461.rdf
Name: Prochlorococcus_quality
Units: unitless
Description: <p>Prochlorococcus Quality Flag; 0 = Less than detection limit; 1 = Good data; 2 = Single measurement - no assessment of measurement variation; 3 = >5% difference of techinical duplicates (flow cytometry)</p>
http://lod.bco-dmo.org/id/dataset-parameter/886462.rdf
Name: ProChl
Units: unitless
Description: <p>Chlorophyll fluorescence per cell relative to fluorescence of beads: the mean of red fluorescence (680 nm emission wavelength) for the gated Prochlorococcus was divided by the mean of red fluorescence (680 nm emission wavelength) for the gated fluorescent bead standard</p>
http://lod.bco-dmo.org/id/dataset-parameter/886463.rdf
Name: ProFSC
Units: unitless
Description: <p>Forward scatter (FSC) per cell relative to forward scatter of beads: the mean of forward scatter for the gated Prochlorococcus was divided by the mean of forward scatter for the gated fluorescent bead standard</p>
http://lod.bco-dmo.org/id/dataset-parameter/886464.rdf
Name: eMIT9312
Units: cells ml-1
Description: <p>Prochlorococcus eMIT9312 (HLII clade) cell concentration based on quantitative PCR</p>
http://lod.bco-dmo.org/id/dataset-parameter/886465.rdf
Name: eMIT9312_quality
Units: unitless
Description: <p>eMIT9312 Quality Flag; 0 = Less than detection limit; 1 = Good data; 2 = Single measurement - no assessment of measurement variation; 4 = >50 %CV (ecotypes qPCR)</p>
http://lod.bco-dmo.org/id/dataset-parameter/886466.rdf
Name: eMED4
Units: cells ml-1
Description: <p>Prochlorococcus eMED4 (HLI clade) cell concentration based on quantitative PCR</p>
http://lod.bco-dmo.org/id/dataset-parameter/886467.rdf
Name: eMED4_quality
Units: unitless
Description: <p>eMED4 Quality Flag; 0 = Less than detection limit; 1 = Good data; 2 = Single measurement - no assessment of measurement variation; 4 = >50 %CV (ecotypes qPCR)</p>
http://lod.bco-dmo.org/id/dataset-parameter/886468.rdf
Name: HLIII
Units: cells ml-1
Description: <p>Prochlorococcus HLIII (HLIII clade) cell concentration based on quantitative PCR</p>
http://lod.bco-dmo.org/id/dataset-parameter/886469.rdf
Name: HLIII_quality
Units: unitless
Description: <p>HLIII Quality Flag; 0 = Less than detection limit; 1= Good data; 2 = Single measurement - no assessment of measurement variation; 4 = >50 %CV (ecotypes qPCR)</p>
http://lod.bco-dmo.org/id/dataset-parameter/886470.rdf
Name: HLIV
Units: cells ml-1
Description: <p>Prochlorococcus HLIV (HLIV clade) cell concentration based on quantitative PCR</p>
http://lod.bco-dmo.org/id/dataset-parameter/886471.rdf
Name: HLIV_quality
Units: unitless
Description: <p>HLIV Quality Flag; 0 = Less than detection limit; 1= Good data; 2 = Single measurement - no assessment of measurement variation; 4 = >50 %CV (ecotypes qPCR)</p>
http://lod.bco-dmo.org/id/dataset-parameter/886472.rdf
Name: eNATL2A
Units: cells ml-1
Description: <p>Prochlorococcus eNATL2A (LLI clade) cell concentration based on quantitative PCR</p>
http://lod.bco-dmo.org/id/dataset-parameter/886473.rdf
Name: eNATL2A_quality
Units: unitless
Description: <p>eNATL2A Quality Flag; 0 = Less than detection limit; 1 = Good data; 2 = Single measurement - no assessment of measurement variation; 4 = >50 %CV (ecotypes qPCR)</p>
http://lod.bco-dmo.org/id/dataset-parameter/886474.rdf
Name: eMIT9313
Units: cells ml-1
Description: <p>Prochlorococcus eMIT9313 (LLIV clade) cell concentration based on quantitative PCR</p>
http://lod.bco-dmo.org/id/dataset-parameter/886475.rdf
Name: eMIT9313_quality
Units: unitless
Description: <p>eMIT9313 Quality Flag; 0 = Less than detection limit; 1 = Good data; 2 = Single measurement - no assessment of measurement variation; 4 = >50 %CV (ecotypes qPCR)</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
12901
https://darchive.mblwhoilibrary.org/server/api/core/bitstreams/0a1689a9-383b-578b-8190-46b9e9556292/content
download
https://doi.org/10.26008/1912/bco-dmo.886299.1
download
onLine
dataset
<p>These data include Prochlorococcus cell concentrations from samples collected during the&nbsp;C-MORE Biogeochemical Gradients Role in Arranging Planktonic Assemblages (BiG-RAPA) expedition (Cruise MV1015) in the Peru Current and Eastern South Pacific Subtropical Gyre between dates 2010-11-19 and 2010-12-10 along a zonal transect from the northern coast of Chile to the island of Rapa Nui.</p>
<p><strong>Seawater Collection: </strong>&nbsp;For both flow cytometry and qPCR samples, 500 milliliters (mL) of seawater from each depth was collected in a clean HDPE bottle (10% bleach for 20 minutes, followed by thorough rinsing with ship's tap water).&nbsp;Each clean HDPE bottle was rinsed 3 times with seawater from the Niskin bottle before filling.</p>
<p><strong>Flow Cytometry: &nbsp;</strong>For each of the 7 stations along the transect, 9 samples were collected across the euphotic zone; from these, water samples were also collected for ecotype qPCR. Depths at each station were chosen based on the location of the deep chlorophyll maximum, the mixed layer depth, and light attenuation profiles. At station 7, samples were also collected from high-resolution deep-chlorophyll maximum casts (63 and 69), and counts for these are included.&nbsp;Fixed samples for flow cytometry were prepared by adding 5 microliters (ul) of 25% glutaraldehyde to 1 mL whole seawater, mixing, and allowing the sample to fix in the dark for 10 minutes, followed by flash freezing in liquid nitrogen. The samples were stored in liquid nitrogen or at -80C for 2-4 months before running flow cytometry. Two or three flow cytometry samples were preserved from each Niskin sampled, but only one of these sampling replicates was run.&nbsp;For each site and depth collected, a sample was run on a BD/Cytopeia Influx flow cytometer with 488 and 457 lasers both illuminating the sample and 2 um fluorescent bead standards mixed in. No stains were used. Detector sensitivity ranges were optimized for Prochlorococcus and held constant throughout all runs. Each sample was thawed in the dark and run twice (flow cytometry technical duplicates). Replicates were run back to back, flushing the lines in between, so that samples weren't left thawed for longer than 1 hour or put through extra freeze-thaw cycles. Values in the table are averages of the pair of technical duplicates. &nbsp;As measurements, these values are good to ~2-3 significant digits (depending on the length of time a sample was run and the number of Prochlorococcus cells actually detected).</p>
<p><strong>Ecotype quantitative PCR: &nbsp;</strong>Samples for qPCR were collected and preserved as described &nbsp;(Zinser et al., 2006). 100 milliliters (mL) of seawater was filtered onto 25 millimeter (mm) diameter, 0.2 micrometer (um) pore size, polycarbonate filters (in triplicate) and chased with 3 mL of preservation solution (10 millimolar (mM) Tris pH=8, 100 mM EDTA, 500 mM NaCl). &nbsp;Filters were placed dry inside 2 mL screw cap polypropylene bead beater tubes and stored at -80 degress C until use.&nbsp;DNA from field samples was extracted from filters as previously described (Zinser et al., 2006). Cells were resuspended by adding 650 microliters (uL) of 10 mM Tris pH=8 to the bead beater tube containing the filter and bead beated at maximum speed (~4800 rpm) for 2 minutes. 500 uL of the respuspended cells were transfered to a 1.5 mL centrifuge tube and the cells were heat lysed at 95 degrees C for 15 minutes. DNA samples were then stored at -80 degrees C until analysis.</p>
<p>The qPCR assay was performed as previously described (Ahlgren et al., 2006; Zinser et al., 2006; Malmstrom et al., 2010; Malmstrom et al., 2012) using the same standards and reaction conditions. Technical duplicates of three replicate filters were analyzed for BiG RAPA (i.e. 6 data points per sample). Data quality was assessed using the percent coefficient of variation for the 6 data points. When cell concentrations fell below the detection limit of the assay (indicated by the associated quality flag), cell concentrations were set to the theoretical detection limit of 0.65 cells/mL.</p>
<p>General Issue: &nbsp;In most cases these water samples are not from the same bottles or depths as cruise core measurement casts.&nbsp;</p>
<p>Flow Cytometry: &nbsp;At station 1, the mixed layer samples do not have technical replicates. In the first few attempted flow cytometry runs Prochlorococcus cells were not visible - not because their fluorescence was low (these waters are relatively turbid), but because the cells were scarce. Later, the remainders of these samples were used for single, long slow runs, and we were able to detect a small Prochlorococcus population - these counts are not robust, representing small numbers with background noise, but they round out the depth profile for a rough idea.</p>
<p>Field samples were collected by Jessie Berta-Thompson and Paul Berube, flow cytometry data were collected and analyzed by Jessie Berta-Thompson and Allison Coe, and quantitative PCR data were collected and analyzed by Allison Coe and Paul Berube.</p>
<p>ProChl values were calculated by normalizing chlorophyll fluorescence of the target population to chlorophyll fluorescence of the standard in the following manner: the mean of red fluorescence (680 nm emmission wavelength) for the gated Prochlorococcus was divided by the mean of red fluorescence (680 nm emmission wavelength) for the gated fluorescent bead standard.</p>
<p>ProFSC values were calculated by normalizing forward scatter of the target population to forward scatter of the standard in the following manner: the mean of forward scatter for the gated Prochlorococcus was divided by the mean of forward scatter for the gated fluorescent bead standard.</p>
<p><strong>QUALITY FLAGS column header = variable[QUALITY]</strong><br />
0 = Less than detection limit<br />
1 = Good data<br />
2 = Single measurement - no assessment of measurement variation<br />
3 = &gt;5% difference of techinical duplicates (flow cytometry)<br />
4 = &gt;50 %CV (ecotype qPCR)</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
Specified by the Principal Investigator(s)
<p>Prochlorococcus counts were obtained by gating across chlorophyll fluorescence (680/40) vs. forward scatter using FlowJo software. &nbsp;Gates were adjusted by hand separately for each sample, since the cell properties change dramatically across this dataset. Concentrations were calculated using sample run times, sample counts and measured flow rates. For surface/mixed layer samples with higher light exposure and smaller cells, many Prochlorococcus populations in this data set were just above or only partly above the fluorescence noise - these counts represent estimates likely on the low side (gating to avoid noise, faintly fluorescing cells undetectable), and they are not as accurate as estimates for the well-separated deeper populations.</p>
<p><strong>BCO-DMO Processing description:</strong><br />
- Adjusted field/parameter names to comply with BCO-DMO naming conventions<br />
- Added a conventional header with dataset name, PI names, version date<br />
- Rounded columns: “Latitude” and “Longitude” to 3 decimal places (or to the thousandth place)<br />
&nbsp;</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Influx Cell Sorter (BD Biosciences and Cytopeia)
Influx Cell Sorter (BD Biosciences and Cytopeia)
PI Supplied Instrument Name: Influx Cell Sorter (BD Biosciences and Cytopeia) Instrument Name: Automated Cell Counter Instrument Short Name:ACC Instrument Description: An instrument that determines the numbers, types or viability of cells present in a sample.
LightCycler 480 System (Roche Applied Science, Indianapolis, Indiana)
LightCycler 480 System (Roche Applied Science, Indianapolis, Indiana)
PI Supplied Instrument Name: LightCycler 480 System (Roche Applied Science, Indianapolis, Indiana) Instrument Name: dPCR Instrument Short Name:dPCR Instrument Description: Digital Polymerase Chain Reaction (dPCR)
Cruise: MV1015
MV1015
R/V Melville
Community Standard Description
International Council for the Exploration of the Sea
R/V Melville
vessel
MV1015
Daniel J. Repeta
Woods Hole Oceanographic Institution
http://cmore.soest.hawaii.edu/cruises/big_rapa/
Report describing MV1015
R/V Melville
Community Standard Description
International Council for the Exploration of the Sea
R/V Melville
vessel