Lenz Petra

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Lenz
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Petra
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  • Dataset
    Field conditions during grazing experiments in Kaneohe Bay, HI during 2012-2013 (EAGER: Copepod nauplii project)
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-01-20) Goetze, Erica ; Lenz, Petra ; Selph, Karen E.
    Environmental conditions in the field during each paired naupliar grazing and community grazing dilution experiment. Copepod nauplii can be a dominant component of the microzooplankton, and are present year-round in subtropical ecosystems. However, little is known about species-level differences in grazing rates and trophic impacts across the naupliar assemblage. Our goals were to measure ingestion by two species of mid-stage (N3-N4) copepod nauplii in a subtropical embayment, evaluate species’ differences in prey preferences, and estimate the trophic impact of naupliar grazing by each species. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/637695
  • Dataset
    Measurements of individual body size and qPCR estimates of DNA copy number per individual from the development of four assays to quantify copeod naupliar biomass in Kaneohe Bay, Hawaii
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2022-02-09) Goetze, Erica ; Lenz, Petra ; Selph, Karen E.
    Quantitative PCR data from developing four assays to quantify copepod naupliar biomass in Kaneohe Bay, Hawaii. These data are from measurements of individual body size and qPCR estimates of DNA copy number per individual. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/869085
  • Dataset
    Flow cytometry results for naupliar grazing laboratory experiments conducted from 2012-2013 (EAGER: Copepod nauplii project)
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-01-19) Goetze, Erica ; Lenz, Petra ; Selph, Karen E.
    These data report initial and final measurements of prey abundances in bottle incubation experiments to measure naupliar grazing, 2012-2013. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/637720
  • Dataset
    Quantification of a previously undescribed fast-start of larval clownfish targeting copepod prey: predatory posture, speed and acceleration from high-speed video, July 2015
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2019-03-18) Lenz, Petra ; Hartline, Daniel K
    Posture, strike speed, and acceleration of clownfish larval attack on copepods, from high-speed videos, June-July 2015. Results of these data are published in Fashingbauer et al (in revision, J. Exp. Biol.) and Robinson et al (accepted, MEPS). For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/750328
  • Dataset
    Metadata for field dilution experiments to measure community microzooplankton grazing rates in Kaneohe Bay, HI from 2012-2013 (EAGER: Copepod nauplii project)
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-01-19) Goetze, Erica ; Lenz, Petra ; Selph, Karen E.
    Overview of community microzooplankton dilution experiments, and Chl-based growth and mortality rates. All experimental water taken from Kaneohe South Bay station and processed on shore within 2 hours of collection on the collection date. Samples for Chl a (fluorometric) filtered and frozen within 5 h of collection, after storage in dark bottles in a cooler. All rate data are adjusted for pigment photoadaptation during the incubation, using red fluorescence from parallel flow cytometry samples (see text for details). *March 2012 chlorophyll data are conservative estimates: most chlorophyll had degraded to phaeopigments when fluorometrically analyzed, so the values represent the sum of Chl a and phaeopigment. No rate data were calculated from these samples. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/637670
  • Dataset
    RNA-Seq sample information and accessions numbers for the copepods Neocalanus flemingeri (Prince William Sound, Gulf of Alaska)(2015-2017) and Labidocera madurae (Kane‘ohe Bay, Oahu, Hawaii)(2017)
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2020-09-17) Hartline, Daniel K ; Lenz, Petra ; Hopcroft, Russell R. ; Roncalli, Vittoria ; Cieslak, Matthew C.
    This dataset includes accession information for RNA-seq data for the copepods Neocalanus flemingeri and Labidocera madurae used to generate de novo reference transcriptomes and for gene expression analysis. N. flemingeri adult females (CVI) were collected in Prince Williams Sound (Gulf of Alaska) during the fall (September 2015 and 2017) oceanographic cruises of the Seward line long-term observation program (ltop)(http://www.sfos.uaf.edu/sewardline/) and Northern Gulf of Alaska Long-Term Ecological Research Program (NGA LTER). For each sample collection date and preservation dates are listed. Labidocera madurae adult females (CVI) and mixed copepodid stages (CIII-CV) were collected in Kane‘ohe Bay, Oahu (Hawaii) in August 2015. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/821289
  • Dataset
    Neocalanus copepod egg production is described from the Northern Gulf of Alaska for Fall 2015, 2016, 2017
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-11-08) Hopcroft, Russell R. ; Lenz, Petra
    Neocalanus copepod egg production is described from the Northern Gulf of Alaska for Fall 2015, 2016,2017. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/852869
  • Article
    Diapause vs. reproductive programs: transcriptional phenotypes in a keystone copepod
    (Nature Research, 2021-03-21) Lenz, Petra ; Roncalli, Vittoria ; Cieslak, Matthew C. ; Tarrant, Ann M. ; Castelfranco, Ann M. ; Hartline, Daniel K
    Many arthropods undergo a seasonal dormancy termed “diapause” to optimize timing of reproduction in highly seasonal environments. In the North Atlantic, the copepod Calanus finmarchicus completes one to three generations annually with some individuals maturing into adults, while others interrupt their development to enter diapause. It is unknown which, why and when individuals enter the diapause program. Transcriptomic data from copepods on known programs were analyzed using dimensionality reduction of gene expression and functional analyses to identify program-specific genes and biological processes. These analyses elucidated physiological differences and established protocols that distinguish between programs. Differences in gene expression were associated with maturation of individuals on the reproductive program, while those on the diapause program showed little change over time. Only two of six filters effectively separated copepods by developmental program. The first one included all genes annotated to RNA metabolism and this was confirmed using differential gene expression analysis. The second filter identified 54 differentially expressed genes that were consistently up-regulated in individuals on the diapause program in comparison with those on the reproductive program. Annotated to oogenesis, RNA metabolism and fatty acid biosynthesis, these genes are both indicators for diapause preparation and good candidates for functional studies.
  • Dataset
    Data resulting from testing dilution experiments conducted in the development of four assays to quantify copeod naupliar biomass in Kaneohe Bay, Hawaii
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2022-02-09) Goetze, Erica ; Lenz, Petra ; Selph, Karen E.
    Quantitative PCR data from developing four assays to quantify copepod naupliar biomass in Kaneohe Bay, Hawaii. This dataset is from testing dilutions of focal species’ DNA into non-focal species’ DNA. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/869011
  • Dataset
    Measurements of mixed field samples used for qPCR estimates and estimating biomass of DNA copy number in bulk samples
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2022-02-09) Goetze, Erica ; Lenz, Petra ; Selph, Karen E.
    Quantitative PCR data from developing four assays to quantify copepod naupliar biomass in Kaneohe Bay, Hawaii. These data are from measurements of mixed field samples that were used for qPCR estimates and estimating biomass of DNA copy number in bulk samples. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/869225