gov.noaa.nodc:0265115 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2026-07-13T21:03:06Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Zooplankton biomass and density collected from R/V LAURENTIAN and R/V LAKE GUARDIAN in Lake Erie in the Great Lakes region from 2005-05-11 to 2007-09-20 (NCEI Accession 0265115) 2022-10-26 publication 2022-10-11 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0265115 NCEI Archive Management System 0265115 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Lacey Mason NOAA Great Lakes Environmental Research Laboratory (GLERL) lacey.mason@noaa.gov http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information resourceProvider NOAA Great Lakes Environmental Research Laboratory (GLERL) http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information resourceProvider Henry Vanderploeg NOAA Great Lakes Environmental Research Laboratory (GLERL) henry.vanderploeg@noaa.gov http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information principalInvestigator Joann Cavaletto NOAA Great Lakes Environmental Research Laboratory (GLERL) joann.cavaletto@noaa.gov http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information collaborator Lacey Mason NOAA Great Lakes Environmental Research Laboratory (GLERL) lacey.mason@noaa.gov http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information pointOfContact NOAA Great Lakes Environmental Research Laboratory (GLERL) NOAA GLERL Data Manager oar.glerl.data@noaa.gov http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information pointOfContact Cavaletto, Joann NOAA Great Lakes Environmental Research Laboratory http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information author Vanderploeg, Henry NOAA Great Lakes Environmental Research Laboratory http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information author Pothoven, Steven A. NOAA Great Lakes Environmental Research Laboratory http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information author Clouse, Melissa NOAA Great Lakes Environmental Research Laboratory http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information author NOAA Great Lakes Environmental Research Laboratory http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information author NOAA Great Lakes Environmental Research Laboratory (GLERL) http://www.glerl.noaa.gov/ HTTP NOAA Great Lakes Environmental Research Laboratory (GLERL) website Institution web page information contributor tableDigital NOAA Great Lakes Environmental Research Laboratory (GLERL) samples and studies the ecosystem of the lower food web of the Laurentian Great Lakes. This collection contains zooplankton biomass and density data at 21 stations and 4 transects during the open water season in Lake Erie in 2005 and 2007. Zooplankton density is given in the number of organisms per cubic meter and biomass is given in milligrams per cubic meter. The file format included in this data package is .csv. These data were collected to study the lower food web dynamics in Lake Erie in coordination with the International Field Years on Lake Erie (IFYLE). The three primary objectives of the IFYLE program were to 1) quantify the spatial extent of hypoxia across the lake, and gather information that can help forecast its timing, duration, and extent; 2) assess the ecological consequences of hypoxia to the Lake Erie food web, including phytoplankton, bacteria, microzooplankton, mesozooplankton, and fish; and 3) identify factors that control the timing, extent, and duration of HAB (including toxin) formation in Lake Erie, as well as enhance our ability to use remote sensing as a tool to rapidly map HAB distributions in the lake. Funding Agency: USEPA Great Lakes National Program Office Funding Agency: NOAA Great Lakes Environmental Research Laboratory completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0265115 Preview graphic PNG 0265115 NCEI ACCESSION NUMBER 2022-09-06 publication DEPTH - OBSERVATION ZOOPLANKTON BIOMASS ZOOPLANKTON DENSITIES theme NODC DATA TYPES THESAURUS net - zooplankton net instrument NODC INSTRUMENT TYPES THESAURUS laboratory analyses theme NODC OBSERVATION TYPES THESAURUS LAURENTIAN USEPA Lake Guardian platform NODC PLATFORM NAMES THESAURUS NOAA Great Lakes Environmental Research Laboratory dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Great Lakes Environmental Research Laboratory dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Great Lakes place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/OAR/GLERL > Great Lakes Environmental Research Laboratory, OAR, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian NOAA/GLERL Ecosystem Dynamics project Provider Project Names EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian PLANKTON NETS instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Ships platform Global Change Master Directory (GCMD) Platform Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian LAURENTIAN (ICES code: 33LA) platform ICES/SeaDataNet Ship Codes CONTINENT > NORTH AMERICA > CANADA > GREAT LAKES, CANADA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GREAT LAKES place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian CP4D2Y Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Cavaletto, Joann; Vanderploeg, Henry; Pothoven, Steven A.; Clouse, Melissa; NOAA Great Lakes Environmental Research Laboratory (2022). Zooplankton biomass and density collected from R/V LAURENTIAN and R/V LAKE GUARDIAN in Lake Erie in the Great Lakes region from 2005-05-11 to 2007-09-20 (NCEI Accession 0265115). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0265115. Accessed [date]. Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. POTHOVEN, S. A., VANDERPLOEG, H. A., CAVALETTO, J. F., KRUEGER, D. M., MASON, D. M., & BRANDT, S. B. (2007). Alewife planktivory controls the abundance of two invasive predatory cladocerans in Lake Michigan. Freshwater Biology, 52(3), 561–573. https://doi.org/10.1111/j.1365-2427.2007.01728.x 2007-02-12 publication International DOI Foundation (IDF) https://doi.org/10.1111/j.1365-2427.2007.01728.x https://doi.org/10.1111/j.1365-2427.2007.01728.x HTTPS https://doi.org/10.1111/j.1365-2427.2007.01728.x related journal article information POTHOVEN, STEVEN A. author VANDERPLOEG, HENRY A. author CAVALETTO, JOANN F. author KRUEGER, DAMON M. author MASON, DORAN M. author BRANDT, STEPHEN B. author Wiley publisher documentDigital Freshwater Biology 52(3) ISSN 0046-5070, ISSN 1365-2427, pp. 561-573 crossReference sciencePaper Culver, D. A., Boucherle, M. M., Bean, D. J., & Fletcher, J. W. (1985). Biomass of Freshwater Crustacean Zooplankton from Length–Weight Regressions. Canadian Journal of Fisheries and Aquatic Sciences, 42(8), 1380–1390. https://doi.org/10.1139/f85-173 1985-08-01 publication International DOI Foundation (IDF) https://doi.org/10.1139/f85-173 https://doi.org/10.1139/f85-173 HTTPS https://doi.org/10.1139/f85-173 related journal article information Culver, David A. author Boucherle, Mary M. author Bean, David J. author Fletcher, James W. author Canadian Science Publishing publisher documentDigital Can. J. Fish. Aquat. Sci. 42(8) ISSN 0706-652X, ISSN 1205-7533, pp. 1380-1390 crossReference sciencePaper HANEY, J. F., & HALL, D. J. (1973). Sugar‐coated Daphnia: A preservation technique for Cladocera1. Limnology and Oceanography, 18(2), 331–333. https://doi.org/10.4319/lo.1973.18.2.0331 1973-03 publication International DOI Foundation (IDF) https://doi.org/10.4319/lo.1973.18.2.0331 https://doi.org/10.4319/lo.1973.18.2.0331 HTTPS https://doi.org/10.4319/lo.1973.18.2.0331 related journal article information HANEY, JAMES F. author HALL, DONALD J. author Wiley publisher documentDigital Limnology & Oceanography 18(2) ISSN 0024-3590, ISSN 1939-5590, pp. 331-333 crossReference sciencePaper Hawkins, B. E., & Evans, M. S. (1979). Seasonal Cycles of Zooplankton Biomass in Southeastern Lake Michigan. Journal of Great Lakes Research, 5(3–4), 256–263. https://doi.org/10.1016/s0380-1330(79)72152-6 1979-01 publication International DOI Foundation (IDF) https://doi.org/10.1016/s0380-1330(79)72152-6 https://doi.org/10.1016/s0380-1330(79)72152-6 HTTPS https://doi.org/10.1016/s0380-1330(79)72152-6 related journal article information Hawkins, Bethany E. author Evans, Marlene S. author Elsevier BV publisher documentDigital Journal of Great Lakes Research 5(3-4) ISSN 0380-1330, pp. 256-263 crossReference sciencePaper Makarewicz, J. C., & Jones, H. D. (1990). Occurrence of Bythotrephes Cederstroemi in Lake Ontario Offshore Waters. Journal of Great Lakes Research, 16(1), 143–147. https://doi.org/10.1016/s0380-1330(90)71407-4 1990-01 publication International DOI Foundation (IDF) https://doi.org/10.1016/s0380-1330(90)71407-4 https://doi.org/10.1016/s0380-1330(90)71407-4 HTTPS https://doi.org/10.1016/s0380-1330(90)71407-4 related journal article information Makarewicz, Joseph C. author Jones, H. Douglas author Elsevier BV publisher documentDigital Journal of Great Lakes Research 16(1) ISSN 0380-1330, pp. 143-147 crossReference sciencePaper Moats, K. M. (2006). Microzooplankton Composition and Dynamics in Lake Erie [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1145290028 2006 publication http://rave.ohiolink.edu/etdc/view?acc_num=akron1145290028 HTTP http://rave.ohiolink.edu/etdc/view?acc_num=akron1145290028 related thesis information Moats, K.M. author The University of Akron. publisher 68 p. crossReference sciencePaper Pothoven, S. A., Vanderploeg, H. A., Ludsin, S. A., Höök, T. O., & Brandt, S. B. (2009). Feeding ecology of emerald shiners and rainbow smelt in central Lake Erie. Journal of Great Lakes Research, 35(2), 190–198. https://doi.org/10.1016/j.jglr.2008.11.011 2009-06 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.jglr.2008.11.011 https://doi.org/10.1016/j.jglr.2008.11.011 HTTPS https://doi.org/10.1016/j.jglr.2008.11.011 related journal article information Pothoven, Steven A. author Vanderploeg, Henry A. author Ludsin, Stuart A. author Höök, Tomas O. author Brandt, Stephen B. author Elsevier BV publisher documentDigital Journal of Great Lakes Research 35(2) ISSN 0380-1330, pp. 190-198 crossReference sciencePaper Roberts, J.J., 2010. The ecological consequences of hypoxia for yellow perch (Perca flavescens) in Lake Erie. Doctor of Philosophy dissertation, School of Natural Resources and Environment, University of Michigan, Ann Arbor, Michigan. https://hdl.handle.net/2027.42/75890 2010 publication https://hdl.handle.net/2027.42/75890 HTTPS https://hdl.handle.net/2027.42/75890 Dissertation information Roberts, J.J. author University of Michigan, Ann Arbor, Michigan publisher Dissertation crossReference sciencePaper Vanderploeg, H. A., Johengen, T. H., Lavrentyev, P. J., Chen, C., Lang, G. A., Agy, M. A., Bundy, M. H., Cavaletto, J. F., Eadie, B. J., Liebig, J. R., Miller, G. S., Ruberg, S. A., & McCormick, M. J. (2007). Anatomy of the recurrent coastal sediment plume in Lake Michigan and its impacts on light climate, nutrients, and plankton. Journal of Geophysical Research: Oceans, 112(C3). https://doi.org/10.1029/2004jc002379 2007-03 publication International DOI Foundation (IDF) https://doi.org/10.1029/2004jc002379 https://doi.org/10.1029/2004jc002379 HTTPS https://doi.org/10.1029/2004jc002379 related journal article information Vanderploeg, H. A. Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration Ann Arbor Michigan USA author Johengen, T. H. Cooperative Institute for Limnology and Ecosystem Research Ann Arbor Michigan USA author Lavrentyev, P. J. Department of Biology University of Akron Akron Ohio USA author Chen, C. School of Marine Science and Technology University of Massachusetts–Dartmouth Dartmouth Massachusetts USA author Lang, G. A. Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration Ann Arbor Michigan USA author Agy, M. A. School of Natural Resources and the Environment University of Michigan Ann Arbor Michigan USA author Bundy, M. H. Office of Polar Programs National Science Foundation Arlington Virginia USA author Cavaletto, J. F. Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration Ann Arbor Michigan USA author Eadie, B. J. Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration Ann Arbor Michigan USA author Liebig, J. R. Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration Ann Arbor Michigan USA author Miller, G. S. Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration Ann Arbor Michigan USA author Ruberg, S. A. Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration Ann Arbor Michigan USA author McCormick, M. J. Great Lakes Environmental Research Laboratory National Oceanic and Atmospheric Administration Ann Arbor Michigan USA author American Geophysical Union (AGU) publisher documentDigital J. Geophys. Res. 112(C3) ISSN 0148-0227 crossReference sciencePaper Vanderploeg, H. A., Ludsin, S. A., Ruberg, S. A., Höök, T. O., Pothoven, S. A., Brandt, S. B., Lang, G. A., Liebig, J. R., & Cavaletto, J. F. (2009). Hypoxia affects spatial distributions and overlap of pelagic fish, zooplankton, and phytoplankton in Lake Erie. Journal of Experimental Marine Biology and Ecology, 381, S92–S107. https://doi.org/10.1016/j.jembe.2009.07.027 2009-12 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.jembe.2009.07.027 https://doi.org/10.1016/j.jembe.2009.07.027 HTTPS https://doi.org/10.1016/j.jembe.2009.07.027 related journal article information Vanderploeg, Henry A. author Ludsin, Stuart A. author Ruberg, Steven A. author Höök, Tomas O. author Pothoven, Steven A. author Brandt, Stephen B. author Lang, Gregory A. author Liebig, James R. author Cavaletto, Joann F. author Elsevier BV publisher documentDigital Journal of Experimental Marine Biology and Ecology 381 ISSN 0022-0981, pp. S92-S107 crossReference sciencePaper Vanderploeg, H. A., Ludsin, S. A., Cavaletto, J. F., Höök, T. O., Pothoven, S. A., Brandt, S. B., Liebig, J. R., & Lang, G. A. (2009). Hypoxic zones as habitat for zooplankton in Lake Erie: Refuges from predation or exclusion zones? Journal of Experimental Marine Biology and Ecology, 381, S108–S120. https://doi.org/10.1016/j.jembe.2009.07.015 2009-12 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.jembe.2009.07.015 https://doi.org/10.1016/j.jembe.2009.07.015 HTTPS https://doi.org/10.1016/j.jembe.2009.07.015 related journal article information Vanderploeg, Henry A. author Ludsin, Stuart A. author Cavaletto, Joann F. author Höök, Tomas O. author Pothoven, Steven A. author Brandt, Stephen B. author Liebig, James R. author Lang, Gregory A. author Elsevier BV publisher documentDigital Journal of Experimental Marine Biology and Ecology 381 ISSN 0022-0981, pp. S108-S120 crossReference sciencePaper Vanderploeg, H. A., Pothoven, S. A., Fahnenstiel, G. L., Cavaletto, J. F., Liebig, J. R., Stow, C. A., Nalepa, T. F., Madenjian, C. P., & Bunnell, D. B. (2012). Seasonal zooplankton dynamics in Lake Michigan: Disentangling impacts of resource limitation, ecosystem engineering, and predation during a critical ecosystem transition. Journal of Great Lakes Research, 38(2), 336–352. https://doi.org/10.1016/j.jglr.2012.02.005 2012-06 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.jglr.2012.02.005 https://doi.org/10.1016/j.jglr.2012.02.005 HTTPS https://doi.org/10.1016/j.jglr.2012.02.005 related journal article information Vanderploeg, Henry A. author Pothoven, Steven A. author Fahnenstiel, Gary L. author Cavaletto, Joann F. author Liebig, James R. author Stow, Craig A. author Nalepa, Thomas F. author Madenjian, Charles P. author Bunnell, David B. author Elsevier BV publisher documentDigital Journal of Great Lakes Research 38(2) ISSN 0380-1330, pp. 336-352 crossReference sciencePaper Vanderploeg, H. A., Pothoven, S. A., Krueger, D., Mason, D. M., Liebig, J. R., Cavaletto, J. F., Ruberg, S. A., Lang, G. A., & Ptáčníková, R. (2015). Spatial and predatory interactions of visually preying nonindigenous zooplankton and fish in Lake Michigan during midsummer. Journal of Great Lakes Research, 41, 125–142. https://doi.org/10.1016/j.jglr.2015.10.005 2015 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.jglr.2015.10.005 https://doi.org/10.1016/j.jglr.2015.10.005 HTTPS https://doi.org/10.1016/j.jglr.2015.10.005 related journal article information Vanderploeg, Henry A. author Pothoven, Steven A. author Krueger, Damon author Mason, Doran M. author Liebig, James R. author Cavaletto, Joann F. author Ruberg, Steven A. author Lang, Gregory A. author Ptáčníková, Radka author Elsevier BV publisher documentDigital Journal of Great Lakes Research 41 ISSN 0380-1330, pp. 125-142 crossReference sciencePaper eng; USA utf8 environment oceans biota -83.3 -80.5 41.5 42.5 2005-05-10 2007-09-20 Methods for Lake Erie zooplankton Diel Zooplankton Tows: Diel samples of zooplankton were pumped through a 64 µm mesh net. The diel samples were collected every four hours over a 24 hour period using a Sandpiper, Warren Rupp diaphragm pump at a flow rate of 2.0 liters per second. Water was pumped to 1-m above the bottom. The water column was divided into epilimnion, metalimnion and hypolimnion based on the CTD profiles of water temperature and DO concentration. If the epilimnion was very deep, it was divided into an upper and lower epilimnion during certain times of the year. A fully mixed water column was divided in half. Water was pumped at 1-m intervals in each zone for a period of time to fully sample the zone and equal approximately one cubic meter of water. Detailed methods are described in Vanderploeg et al. (2009b). Transect Zooplankton Tows: Zooplankton were collected with a 0.5 meter diameter, 64 µm mesh net. The net was vertically towed through the water column at a speed of 0.5 m s-1 from 1 to 2 meters above the bottom to the surface. The nets were washed thoroughly, but gently and the contents were carefully transferred to a sample bottle, narcotized with Alka-Seltzer, and preserved with the addition of sugar formaldehyde to form a 2% solution (Haney & Hall, 1973). Preparation for counting and identifying zooplankton required measurement of the sample volume, gentle mixing of the sample, and removal of an aliquot with a Hensen-Stempel pipette. The aliquot was held in a 100 µm meshed bottom cup and rinsed with tap water to remove the preservative and finally it was poured into a circular counting dish. A minimum 550 zooplankton were identified for each sample. To count large predatory cladocerans, such as Bythotrephes, the whole sample was rinsed through a 600 µm mesh sieve, and all individuals were counted. Taxonomic groups were identified and categorized in the following manner. For copepods, both cyclopoid and calanoid nauplii were combined, copepodites were identified to genus and adult copepods were identified to species. The cladocerans, both herbivorous and predatory, were identified to species. To determine zooplankton biomasses, length measurements were made on a subsample of taxa (10 adult copepods and 25 copepodites or cladocerans) that were over 10% of the total density using Image Pro Plus, image analysis software (Media Cybernetics, Silver Spring, MD). In the case of large predatory cladocerans, all individuals were measured or up to 100 individuals if more than that were present. Biomasses were determined using published length-weight regressions (Culver et al. 1985, Makarewicz and Jones 1990). For zooplankton taxa that comprised less than 10% of the total density, a default weight from the literature was used to determine biomass for all taxa except Bythotrephes (Hawkins and Evans 1979). NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact 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. Contact NCEI for other distribution options and instructions. CSV 3.604 https://www.ncei.noaa.gov/archive/accession/0265115 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/265115 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/265115 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0208/0265115/ FTP Any FTP client FTP 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). download dataset NCEI Accession 0265115 v1.1 was published. 2022-10-26T02:00:18Z NCEI Accession 0265115 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0265115/1.1 HTTPS NCEI Accession 0265115 v1.1 published 2022-10-26T02:00:18Z download dataset Parameter or Variable: ZOOPLANKTON BIOMASS (measured); Units: milligrams per cubic meter; Observation Category: laboratory analysis; Sampling Instrument: net - zooplankton net; Sampling and Analyzing Method: 0.5-m diameter, 2-m long, 64-µm conical plankton net; Data Quality Method: Counts and identifications were analyzed by Cavaletto and Clouse. Parameter or Variable: ZOOPLANKTON DENSITIES (measured); Units: number per cubic meter; Observation Category: laboratory analysis; Sampling Instrument: net - zooplankton net; Sampling and Analyzing Method: 0.5-m diameter, 2-m long, 64-µm mesh conical plankton net; Data Quality Method: Counts and identifications were analyzed by Cavaletto and Clouse. asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian net - zooplankton net net - zooplankton net net - zooplankton net LAURENTIAN LAURENTIAN USEPA Lake Guardian IMO number = 8030609 Launch = 1981 reference = https://www.epa.gov/great-lakes-monitoring/lake-guardian