This readme.txt file was generated on 2021-11-10 by Wesley J. Glisson ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Phenology data for the invasive macroalga Nitellopsis obtusa (starry stonewort) in Minnesota, USA, 2017 - 2018 2. Author Information Principal Investigator Contact Information Name: Wesley J. Glisson Institution: University of Minnesota Address: 135 Skok Hall, 2003 Upper Buford Circle, St Paul MN 55108 Email: wjglisson@gmail.com ORCID: https://orcid.org/0000-0002-2540-3696 Associate or Co-investigator Contact Information Name: Ranjan Muthukrishnan Institution: Boston University Address: 5 Cummington Mall, Boston, MA 02215 ORCID: https://orcid.org/0000-0002-7001-6249 Associate or Co-investigator Contact Information Name: Carli K. Wagner Institution: University of Minnesota Address: 135 Skok Hall, 2003 Upper Buford Circle, St Paul MN 55108 Associate or Co-investigator Contact Information Name: Daniel J. Larkin Institution: University of Minnesota Address: 135 Skok Hall, 2003 Upper Buford Circle, St Paul MN 55108 Email: djlarkin@umn.edu ORCID: https://orcid.org/0000-0001-6378-0495 3. Date of data collection: Data collected 2017-05-11 through 2018-11-14 4. Geographic location of data collection (where was data collected?): Lake Koronis (Stearns/Meeker County) and Moose Lake (Betrami County) in Minnesota, USA. 5. Information about funding sources that supported the collection of the data: Funding for this project was provided by the Minnesota Department of Natural Resources and the Minnesota Aquatic Invasive Species Research Center. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: 2. Links to publications that cite or use the data: Glisson WJ, Muthukrishnan R, Wagner CK, Larkin DJ (2022) Invasive Nitellopsis obtusa (starry stonewort) has distinct late-season phenology compared to native and other invasive macrophytes in Minnesota, USA. Aquatic Botany 176: 103452. https://doi.org/https://doi.org/10.1016/j.aquabot.2021.103452 3. Links to other publicly accessible locations of the data: NA 4. Links/relationships to ancillary data sets: Data from this study were compared to the data of Verhoeven et al. (2021) for analyis in the paper referenced above (Glisson et al. 2022). Verhoeven, Michael R.; Glisson, Wesley J.; Larkin, Daniel J. (2021). Complete Data and Analysis for: Niche models differentiate potential impacts of two aquatic invasive plant species on native macrophytes. https://doi.org/10.13020/cwqe-ge69 5. Was data derived from another source? No 6. Recommended citation for the data: Glisson, Wesley J; Muthukrishnan, Ranjan; Wagner, Carli K; Larkin, Daniel J. (2021). Phenology data for the invasive macroalga Nitellopsis obtusa (starry stonewort) in Minnesota, USA, 2017 - 2018. Retrieved from the Data Repository for the University of Minnesota, https://doi.org/10.13020/2gkz-ge68. --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: Nitellopsis_obtusa_phenologyData_2017-2018.csv Short description: Data collected via rake samples and environmental data measured at each Nitellopsis obtusa phenology sampling location from 2017 - 2018. B. Filename: Nitellopsis_obtusa_phenologyData_2018_bulbils.csv Short description: Nitellopsis obtusa bulbil data from sediment samples collected at each Nitellopsis obtusa phenology sampling location in 2018. 2. Relationship between files: Data across files can be linked by "siteID", described below for each data file. 3. Additional related data collected that was not included in the current data package: NA 4. Are there multiple versions of the dataset? No -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: For a description of the methods used for collection/generation of data please see: Glisson WJ, Muthukrishnan R, Wagner CK, Larkin DJ (2022) Invasive Nitellopsis obtusa (starry stonewort) has distinct late-season phenology compared to native and other invasive macrophytes in Minnesota, USA. Aquatic Botany 176: 103452. https://doi.org/https://doi.org/10.1016/j.aquabot.2021.103452 2. Methods for processing the data: Original data was collected on paper datasheets and then transcribed into a digital format (MS Excel) before analysis. 3. Instrument- or software-specific information needed to interpret the data: NA 4. Standards and calibration information, if appropriate: NA 5. Environmental/experimental conditions: For a description of the environmental/experimental conditions please see: Glisson WJ, Muthukrishnan R, Wagner CK, Larkin DJ (2022) Invasive Nitellopsis obtusa (starry stonewort) has distinct late-season phenology compared to native and other invasive macrophytes in Minnesota, USA. Aquatic Botany 176: 103452. https://doi.org/https://doi.org/10.1016/j.aquabot.2021.103452 6. Describe any quality-assurance procedures performed on the data: All data were checked for accuracy and consistency upon entry and analysis. 7. People involved with sample collection, processing, analysis and/or submission: All authors contributed to these steps. ---------------------------------------------------------------------------------------- DATA-SPECIFIC INFORMATION FOR: Nitellopsis_obtusa_phenologyData_2017-2018.csv ---------------------------------------------------------------------------------------- 1. Number of variables: 21 2. Number of cases/rows: 370 (including column headers) 3. Missing data codes: Code/symbol: NA Definition: The data were not collected for the sample. 4. Variable List A. Name: date Description: Date of data collection. Format: MM/DD/YYYY B. Name: year Description: Year of data collection. C. Name: visit_total Description: The sampling visit during which phenology data were collected across both years of data. D. Name: visit_year Description: The sampling visit during which phenology data were collected, specific to the year of collection. E. Name: lake Description: The lake where sampling occured, either koronis or moose. F. Name: site_name Description: The site (point location) where sampling occured on a lake. Each lake contained 5 sites. G. Name: siteID Description: The combination of lake and site name. H. Name: sample Description: The sample number (1-4) for the rake sample collected at each site during the sampling visit. I. Name: depth_m Description: The depth (meters) of the site during the sampling visit. Occasionally, depth was measured in feet (see below), and in such cases it was subsequently converted to meters. Depth was collected only once at each site during each visit, so the same values are repeated for each sample. J. Name: depth_ft Description: The depth (feet) of the site during the sampling visit. If depth was measured in feet, it was converted to meters (above) for analysis. Depth was collected only once at each site during each visit, so the same values are repeated for each sample. K. Name: rakedens_nitobt Description: The rake-density abundance of the rake sample for Nitellopsis obtusa (on a scale of 1-4). L. Name: rakedens_native Description: The rake-density abundance of the rake sample for all native taxa (on a scale of 1-4). M. Name: rakedens_overall Description: The rake-density abundance of the rake sample for all taxa (on a scale of 1-4). N. Name: nit_obt_biomass_g Description: The biomass (grams) of Nitellopsis obtusa from the rake sample. O. Name: assoc_species Description: The scientific names of some of the submersed aquatic plant taxa collected in rake samples. This list is not exhaustive and aquatic planys were not documented consistently at all sites and during all visits. P. Name: temp_c Description: Water temperature (degrees Celsius) measured 0.5 m below the water's surface. Q. Name: pH Description: pH measured 0.5 m below the water's surface. R. Name: conductivity_microS_cm Description: Conductivity (µS/cm) measured 0.5 m below the water's surface. S. Name: do_perc Description: Dissolved oxygen (percent saturation) measured 0.5 m below the water's surface. T. Name: do_mg_L Description: Dissolved oxygen (mg/L) measured 0.5 m below the water's surface. U. Name: notes Description: Descriptive notes associated with the data. ---------------------------------------------------------------------------------------- DATA-SPECIFIC INFORMATION FOR: Nitellopsis_obtusa_phenologyData_2018_bulbils.csv ---------------------------------------------------------------------------------------- 1. Number of variables: 10 2. Number of cases/rows: 182 (including column headers) 3. Missing data codes: Code/symbol: NA Definition: The data were not collected for the sample. 4. Variable List A. Name: date Description: Date of data collection. Format: MM/DD/YYYY B. Name: year Description: Year of data collection. C. Name: visit_year Description: The sampling visit during which bulbil samples were collected, specific to the year of collection (2018 only). D. Name: lake Description: The lake where sampling occured, either koronis or moose. E. Name: site_name Description: The site (point location) where sampling occured on a lake. Each lake contained 5 sites. F. Name: siteID Description: The combination of lake and site name. G. Name: sample Description: The sample number (1-3) for the sediment sample collected at each site during the sampling visit. H. Name: sample_weight_g Description: The weight (grams) of the sediment sample. Samples were weighed in plastic Ziploc bags and the weight of the bag is included in the measured weight. Occasionally, the sample was placed in two plastic bags and both bags were weighed; this is indicated in the "notes" column. When this occured, the measured weight includes the combined weight of both bags. I. Name: bulbil_count Description: The number of Nitellopsis obtusa bulbils counted in the sediment sample. J. Name: notes Description: Descriptive notes associated with the data. These indicate when a sample was weighed in two plastic bags.