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Seagrass metrics from from seagrass wasting disease mesocosm experiments conducted at Bodega Marine Laboratory from July-September 2015 (NCEI Accession 0291617)


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            title:  Seagrass metrics from from seagrass wasting disease mesocosm experiments conducted at Bodega Marine Laboratory from July-September 2015 (NCEI Accession 0291617)
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                date:  2024-04-21
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                  Anchor:  http://lod.bco-dmo.org/id/person/522929 A. Randall Hughes
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                  Anchor:  http://lod.bco-dmo.org/id/person/881979 Katherine DuBois
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1445 University of California - Davis
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                  Anchor:  http://lod.bco-dmo.org/id/person/881977 Melissa Kardish
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/715 University of California - Davis; Bodega Marine Laboratory (BML)
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                  Anchor:  http://lod.bco-dmo.org/id/affiliation/191 Biological and Chemical Oceanography Data Management Office (BCO-DMO)
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                  Anchor:  http://lod.bco-dmo.org/id/person/881979 DuBois, Katherine
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        abstract:  This dataset contains biological data collected from 2015-07-01 to 2015-09-14. These data include growth and temp_incub. The instruments used to collect these data include Aquarium, Aquarium chiller, Homogenizer, Immersion heater, and qPCR Thermal Cycler. These data were collected by A. Randall Hughes and Forest Schenck of Northeastern University and John J. Stachowicz, Katherine DuBois, and Melissa Kardish of University of California-Davis as part of the "CAREER: Linking genetic diversity, population density, and disease prevalence in seagrass and oyster ecosystems (Seagrass and Oyster Ecosystems)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2022-11-22. The following is the text of the dataset description provided by BCO-DMO: Acquisition Description: Mesocosm experiment. We used a substitutive design to test the effects of eelgrass genotypic identity (eight genotypes), diversity (monocultures of 1 genotype vs. polycultures of 4 genotypes), and temperature (ambient or + 3.2° C) on the prevalence and intensity of the wasting disease parasite Labyrinthula over eight weeks in an array of flow-through 120-Liter mesocosms at the Bodega Marine Laboratory in Bodega Bay, CA. In July 2015, we created ten unique polyculture combinations of four genotypes (4 genotypes per experimental pot) randomly drawn from a pool of eight genotypes; all eight genotypes were also grown in monoculture (1 genotype per pot). We filled pots (8.9 x 8.9 cm) with coarsely sieved sediment collected from Bodega Harbor, and planted 4 shoots of eelgrass per pot, matching the lower range of average field densities reported for Bodega Harbor (Ha and Williams, 2018) to allow for growth during the experiment. Plants were originally collected in Bodega Harbor, CA in 2012, confirmed to be unique genotypes using 11 DNA microsatellite loci developed specifically for Zostera marina (Abbott et al. 2018), and propagated in separate flow through mesocosms at Bodega Marine Lab. We previously characterized traits of each genotype relating to growth rate, morphology, nutrient content, and chemical defense in common garden experiments at ambient temperature from July 2013 to August 2014 (Abbott et al., 2018). We selected the 8 genotypes used in this experiment to encompass the range of trait values determined for this population of eelgrass measured when the common garden was experiencing marine heatwave conditions (DuBois et al., 2019). We assigned ten pots -- two unique polyculture combinations and each of the eight monocultures -- to each of ten mesocosms, with five mesocosms per temperature treatment (see DuBois et al. 2020 for a diagram of the experimental set up). All mesocosms received sand-filtered flow-through seawater at a rate of approximately 0.8-1.0 liters per minute (L min -1 ). We allowed the plants to acclimate for one month prior to initiating the temperature treatments. We maintained an ambient temperature treatment by cooling flow-through seawater in a head tank by approximately 1˚C using an Aqua Logic Delta Star in-line titanium chiller. Seawater in the elevated temperature treatment was raised approximately 3˚C above the ambient treatment in a separate header tank using Process Technologies titanium immersion heaters. This level of warming mimicked the 2014 and 2015 extreme warming events in the Northern Pacific, where the mass of unusually warm water called “The Blob” raised summer ocean temperatures three standard deviations above the long-term average (Sanford et al., 2019). At the end of the experiment (10 weeks), we estimated lesion percent cover of the third rank leaf of the terminal shoot of each transplant (i.e., focal leaf) to measure the signs of wasting disease (Burdick et al., 1993). We recorded lesions as either absent, <1%, <10%, or ≥10% cover. When lesions were ≥10% cover, we also recorded a numerical estimate of lesion percent cover. We then collected and preserved the top half of the focal leaf in individual plastic bags sealed with 30 milliliters of silica (Flower Drying Art Silica Gel; Activa) for subsequent DNA extraction and quantitative PCR to estimate Labyrinthula zosterae cells as a proxy for infection (Bergmann et al., 2011; Bockelmann et al., 2013; Groner et al., 2021). At one-month intervals over the course of the experiment, we measured leaf growth rate of the terminal shoot of each transplant using the “hole-punch” method (Williams and Ruckelshaus, 1993). Labyrinthula zosterae infection can be affected by plant defenses (Steele et al., 2005; Trevathan-Tackett et al., 2015) and these defenses may trade off with plant growth rate, resulting in a positive relationship between growth rate and infection. Alternatively, L. zosterae infection can result in reduced leaf growth rate (Graham et al., 2021), leading to a negative relationship. L. zosterae prevalence can also be affected by plant size (Groner et al., 2016), due to greater leaf-to-leaf contact and resulting increased parasite transmission (Muehlstein, 1992), so we measured the length of the focal leaf of each transplant at the end of the experiment. Labyrinthula zosterae DNA extraction and quantitative PCR Assay We extracted L. zosterae DNA from dried leaf tissue using Omega Bio-Tek E.Z. Tissue DNA extraction kits at the Northeastern University Marine Science Center in Nahant, MA. For each sample, we separated the dried leaf tissue into 2-16 mg subsamples and homogenized the tissue in a ball mill (Retsch, Germany) at a frequency of 30 Hz for 5 min (Bockelmann et al. 2013). We lysed ground subsamples individually following the manufacturer’s instructions and added 1 microliter of 500 ng per microliter (ng*uL -1 ) salmon sperm DNA solution (Invitrogen, USA) to the first subsample of each sample immediately before recombining all subsamples in the spin columns. Salmon sperm DNA was added to enhance extraction efficiency and ensure that even low amounts of target DNA are carried through the filter absorption steps (Bockelmann et al., 2013). We eluted all DNA extractions into 100 uL. Following elution, we used Zymo OneStep-96 PCR Inhibitor Removal kits to clean 50 uL sub-samples of each DNA extraction following the manufacturers instructions. We stored cleaned DNA extractions at -20˚C prior to quantitative PCR. We used a TaqMan quantitative PCR (qPCR) assay with a forward primer: TTGAACGTAACATT-CGACTTTCGT, reverse primer: ACGCATGAAGCGGTCTTCTT, and MBG probe: TGGACGAGTGTGTTTTG that carries the fluorescence label 6-Fam at the 5’ end and the dark quencher FHQ at the 3’ end (Bio-Rad, USA) developed specifically for L. zosterae (Bockelmann et al., 2013, Bergmann et al., 2011). We made up qPCR reactions to a 10 uL reaction volume using standard conditions recommended by the manufacturer: 5 uL SsoAdvanced TM Universal Probes Supermix 2x (Bio-Rad, USA), 1 uL template DNA, 0.4 uL 4:1 Primer:Probe Mix (final concentrations of 400 nM forward primer, 400 nM reverse primer, 100 nM probe), and 3.6 uL Milli-Q H 2 O (Thermofisher, USA). Reactions were run on a CFX96 Real-Time System (Bio-Rad, USA) using the following thermo-cycling program: 3 min at 95˚C, followed by 40 cycles of 15 sec at 95˚C and 1 min at 60˚C. We tested all samples in duplicate and if replicates differed by greater than one cycle threshold (Ct), reactions were rerun in triplicate. We only used the data from reactions in analyses when replicates fell within one Ct. Our lowest detection was 1.76 copies per reaction or 0.15 cells per extraction. We ran each 96-well plate of qPCR reactions with a set of nine standards: a dilution series of gBlock Gene Fragments (Integrated DNA Technologies, USA) designed based on the highly conserved sequence of the 5.8s ribosomal RNA gene of L. zosterae known as internal transcribed spacer 1 (ITS) targeted by the TaqMan qPCR assay; an L. zosterae cell standard consisting of a sample of DNA extracted from a know quantity of pathogenic L. zosterae cells; and an inhibition control consisting of a half volume of L. zosterae cell standard and a half volume of a haphazardly selected sample. We ran a total of 31 96-well plates of qPCR reactions with a mean efficiency of 97.4% ± 4.3 and R 2 0.996 ± 0.004. To convert Ct values to to L. zosterae cell numbers, four equations were used. The equations and details are captured in the Supplemental Files section of this metadata within the file titled, "Equations for conversion of Ct values to Labyrinthula zosterae cell numbers." We used a pure culture of the pathogenic L. zosterae isolate 316b provided by D. Martin in 2015 to make our L. zosterae cell standard (Martin et al., 2016; GenBank: KU559372.1). We cultured L. zosterae cells on serum seawater agar media (Muehlstein et al., 1991). We scraped cells from an actively growing edge of L. zosterae culture into serum seawater liquid media (D. Martin pers. com.). We mixed the liquid media + L. zosterae cell slurry vigorously on a bench top vortex for 30 sec and aliquoted immediately into three replicate subsamples for cell counts and extraction. In order to break up cell clumps for ease of counting, we added Tween80 (Sigma-Aldrich, USA) to a final concentration of 1:100 into the two subsamples used for cell counts, and mixed for 30 sec. We counted cells of four replicate aliquots per subsample on a hemocytometer. We calculated cell concentration by averaging over all replicates. Prior to DNA extraction, we centrifuged the third replicate L. zosterae cell solution at 6,000 g for 10 min and drew off the supernatant without disturbing the cell pellet. We then added a ~4 mg section of dried healthy Zostera. marina tissue to the cell pellet to account for possible interference of Zostera marina compounds in the extraction process. To extract L. zosterae DNA, we followed the DNA extraction and inhibitor removal protocols outlined above. We designed the gBlock double stranded DNA fragments (Integrated DNA Technologies, USA) using published sequences of the ITS region of the L. zosterae genome (GenBank: JN121409-13). 5’-CTGTGATCTCTGAAAATACTTGTTT (1) TTGAACGTAACATTCGACTTTCGT CGATT TTG (2) TGGACGAGTGTGTTTTGT AAACCTACCC (3) AAGAAGACCGCTTCATGCGT GTCGCTGACTAATGAAACAAACAAA-3’ The gBlock fragment sequences were a total length of 130 bp (base pairs), which included target regions for the forward (1) and reverse (3) primers and the MGD probe (2), underlined above, as well as 25 base pairs of additional sequence on both the 5’ and 3’ ends to increase fragment stability. We diluted gBlock fragments in Milli-Q H 2 O (Thermofisher, USA) to seven concentrations: 2.24e 1 , 1.12e 2 , 5.61e 2 , 2.81e 3 , 1.40e 4 , 7.02e 4 , 7.02e 5 copies/µL and included this dilution series in each qPCR run as a standard curve (Bergmann et al., 2011). The range of the gBlock dilution curve: approx. 1-60,000 cells/extraction encompassed the range of most L. zosterae values observed in our samples: 0.15-450,000 cells/extraction or 1.84e 2 -5.52e 8 copies/extraction. Life Sciences Identifiers (LSID) for taxonomic names: Zostera marina (urn:lsid:marinespecies.org:taxname:145795) Labyrinthula zosterae (urn:lsid:marinespecies.org:taxname:395093) Labyrinthula (urn:lsid:marinespecies.org:taxname:119090)
        purpose:  This dataset is available to the public for a wide variety of uses including scientific research and analysis.
        credit:
          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=1652320 Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1652320 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1652320
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/534 growth rate
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                            name:  UC Davis website
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                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1416 Biological and Chemical Oceanography Data Management Office (BCO-DMO)
                    contactInfo:  (CI_Contact)
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                            linkage: http://bcodmo.org
                            protocol:  HTTP
                            name:  Biological and Chemical Oceanography Data Management Office website
                            description:  Institution web page
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        language:
          LanguageCode:  eng; USA
        characterSet:  (MD_CharacterSetCode) utf8
        topicCategory:  (MD_TopicCategoryCode) environment
        topicCategory:  (MD_TopicCategoryCode) oceans
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            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  -123.066
                eastBoundLongitude:  -123.066
                southBoundLatitude:  38.318
                northBoundLatitude:  38.318
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  2015-07-01
                    endPosition:  2015-09-14
        supplementalInformation: (missing)
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    distributionInfo:  (MD_Distribution)
        distributor:  (MD_Distributor)
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 NOAA National Centers for Environmental Information
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  +1-301-713-3277
                    address:  (CI_Address)
                        electronicMailAddress:  NCEI.Info@noaa.gov
                role:  (CI_RoleCode) pointOfContact
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
                orderingInstructions:  Contact NCEI for other distribution options and instructions.
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                onLine:  (CI_OnlineResource)
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                    linkage: https://www.ncei.noaa.gov/archive/accession/oas/291617
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                    linkage: https://www.ncei.noaa.gov/archive/accession/download/291617
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                    description:  Navigate directly to the URL for data access and direct download.
                    function:  (CI_OnLineFunctionCode) download
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                    linkage: ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0227/0291617/
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                    applicationProfile:  Any FTP client
                    name:  FTP
                    description:  These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
                    function:  (CI_OnLineFunctionCode) download
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        lineage:  (LI_Lineage)
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                description:  NCEI Accession 0291617 v1.1 was published.
                dateTime:
                  DateTime:  2024-04-21T21:58:37Z
                output:  (LE_Source)
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                        title:  NCEI Accession 0291617 v1.1
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                            dateType:  (CI_DateTypeCode) publication
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                            individualName: (inapplicable)
                            contactInfo:  (CI_Contact)
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                                    linkage: https://www.ncei.noaa.gov/archive/accession/0291617/1.1
                                    protocol:  HTTPS
                                    name:  NCEI Accession 0291617 v1.1
                                    description:  published 2024-04-21T21:58:37Z
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                            role: (inapplicable)
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) asNeeded
        maintenanceNote:  Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
        contact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            role:  (CI_RoleCode) custodian
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  PCR machine
            type:  PCR machine
            description:  thermal cycler, thermocycler, PCR machine, DNA amplifier The thermal cycler (also known as a thermocycler, PCR machine or DNA amplifier) is a laboratory apparatus most commonly used to amplify segments of DNA via the polymerase chain reaction (PCR). https://en.wikipedia.org/wiki/Thermal_cycler, 2017-05-02.