This codebook.txt file was generated on 2018-11-01 ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Data Supporting 'Adverse impacts of hypoxia on aquatic invertebrates: A meta-analysis’ 2. Author Information Principal Investigator Contact Information Name: Nika Galic Institution: University of Minnesota Address: 100 Ecology, 1987 Upper Buford Circle, St. Paul, MN 55108 Email: nika.galic001@gmail.com Associate or Co-investigator Contact Information Name: Tanner Hawkins Institution: University of Nebraska-Lincoln Address: University of Nebraska-Lincoln, Lincoln, NE 68588, USA Email: t.r.hawkins@hotmail.com Associate or Co-investigator Contact Information Name: Valery Forbes Institution: University of Minnesota Address: Email: veforbes@umn.edu 3. Date of data collection:2015-01 to 2018-08 4. Geographic location of data collection (where was data collected?): NA 5. Information about funding sources that supported the collection of the data: Collected during a postdoctoral project funded by Valery Forbes (Dean's start-up funds). -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: N/A 2. Links to publications that cite or use the data: Galic, N., T. Hawkins, and V. E. Forbes. 2019. Adverse impacts of hypoxia on aquatic invertebrates: A meta-analysis. Science of The Total Environment 652:736-743. https://primo.lib.umn.edu/primo-explore/fulldisplay?docid=TN_sciversesciencedirect_elsevierS0048-9697(18)34121-4&context=PC&vid=TWINCITIES&search_scope=mncat_discovery&tab=article_discovery&lang=en_US 3. Links to other publicly accessible locations of the data: NA 4. Links/relationships to ancillary data sets: NA 5. Was data derived from another source? Yes If yes, list source(s): Data were gathered from published studies 6. Recommended citation for the data: Galic, Nika; Hawkins, Tanner; Forbes, Valery E.. (2018). Data supporting "Adverse impacts of hypoxia on aquatic invertebrates: A meta-analysis". Retrieved from the Data Repository for the University of Minnesota, http://hdl.handle.net/11299/200706. --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: Galic et al. 2019 STOTEN hypoxia data.csv Short description: Data set was gathered by extracting and digitizing data from published studies. Raw data were scaled to controls (i.e. high levels of oxygen). B. Filename: Bibliographic_Data.pdf Short description: Full citations for bibliographic data used in creation of this dataset -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: Data were gathered from published, peer-reviewed studies, either copying if in tabular form or digitizing if they were plotted, using DataThief sharewarewhich extracts data points from plots. We searched for relevant data using Google Scholar and Scopus, using different combinations of keywords describing organisms of interest (“invertebrate”, “mollusc”, “mussel”, “bivalve”, “clam”, “amphipod”, “crayfish”, “crab”, “crustacean”, “aquatic insect”), their environment (“aquatic”, “freshwater”, “marine”), oxygen limitation (“hypoxia”, “anoxia”, “low dissolved oxygen”, “low oxygen tension”), and the response variables of interest such as growth (“length”, “mass”, “weight”, “grow”), reproduction (“fecundity”, “reproduction”, “reproduc*”, “egg”), feeding (“feeding”, “consum*”, “feed”, “intake”) and respiration (“oxygen consumption”, “respiration”). We included studies published in English and also looked for cited and related articles through the above search engines. Studies of responses at the cellular or physiological level were not taken into account, because we were primarily concerned with effects on organismal properties, and how the two are linked is not always clear (Spicer, 2014). Similarly, studies quantifying changes in behavior such as burrowing were also omitted from the analysis. We found 55 studies that corresponded to our criteria and that were further analyzed (Table 1). We also found several studies that tested hyperoxic conditions, i.e. those above normal or expected oxygen concentrations, but we omitted these data points from further analysis. 2. Methods for processing the data: Endpoints were measured in different ways and units, which were not immediately comparable across taxa and systems. We therefore normalized the extracted data by scaling measurements in different treatments to control, i.e. normoxic conditions.When controls were reported as averages with standard deviations, we used the value of the mean and one standard deviation for scaling. For studies testing impacts of oxygen and temperature, we scaled measured endpoints to normoxic conditions for each temperature treatment. If experiments reported results for different periods of time, we also scaled treatment results to control for each tested period. 3. Describe any quality-assurance procedures performed on the data: Extracted data were re-plotted and compared with the original figures (visually), in addition to re-checking the values in the database with those reported in tables or figures in selected publications. 4. People involved with sample collection, processing, analysis and/or submission: Tanner Hawkins and Nika Galic extracted the data, Nika Galic analyzed the data. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: Galic et al. 2019 STOTEN hypoxia data.csv ----------------------------------------- 1. Number of variables: 6 2. Number of cases/rows: 4613 rows 3. Missing data codes: Code/symbol Definition Code/symbol Definition 4. Variable List A. Name: author Description: Authors of relevant study B. Name: process Description: Physiological process tested under different oxygen availaility treatments; Feeding, Growth, Reproduction, Respiration C. Name: DO_mgL Description: Oxygen availability in the experiment (Dissolved Oxygen, mg/L) D. Name: endpoint_scaled Description: Values extracted from published studes and scales to normoxix conditions. E. Name: taxon Description: Phylum or subphylum of the species tested. F. Name: species_names Description: Latin name of the species from published studies.