Data, associated metadata, and calculation tools.. This dataset is not publicly accessible because: Data is controlled by Proctor and Gamble, and is available upon request. It can be accessed through the following means: Available from the upon request from Kristin Connors (connors.ka@pg.com). Format: Data, associated metadata, and calculation tools. This dataset is associated with the following publication: Connors, K., J. Brill, T. Norberg-King, M. Barron, G. Carr, and S. Belanger. Daphnia magna and Ceriodaphnia dubia Have Similar Sensitivity in Standard Acute and Chronic Toxicity Tests. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, USA, 41(1): 134-147, (2022).

Data used for publication. This dataset is associated with the following publication: Struewing, K., P. Weaver, J. Lazorchak , B. Johnson , D. Funk, and D. Buckwalter. Part 2: Sensitivity comparisons of the insect Centroptilum triangulifer to Ceriodaphnia dubia and Daphnia magna using standard reference toxicants; NaCl, KCl and CuSO4. CHEMOSPHERE. Elsevier Science Ltd, New York, NY, USA, 11(139): 597-603, (2015).

This dataset concerns the development of models for describing the acute toxicity of major ions to Ceriodaphnia dubia using data from single salt tests and binary mixture tests described in two other datasets under this research effort. It provides the data used in model development in the associated journal article. It also provides concentration-response data and associated general chemistry conditions for 3 experiments consisting of 14 toxicity tests on more complex mixtures of major ions based on data regarding elevated major ions in effluents and receiving waters, which was used for testing the models. . This dataset is associated with the following publication: Erickson, R., D. Mount, T. Highland, R. Hockett, D. Hoff, T. Norberg-King, and K. Peterson. The acute toxicity of major ion salts to Ceriodaphnia dubia: III. Mathematical models for mixture toxicity. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, USA, 1-13, (2017).

This effort involved intensive chronic toxicity testing of major ion salts (comprised of Na, K, Ca, Mg, Cl, SO4, HCO3/CO3) with the cladoceran, Ceriodaphnia dubia, a species known to be relatively sensitive to ion enrichment. This is the fourth in a series of manuscripts discussing the sensitivity of this species to major ions, with a specific focus of determining whether the principles governing acute response of this species to major ions also predict chronic responses. Results show this to be true, with acute-chronic ratios that are fairly consistent across different major ions, and responses to binary mixtures that show the same types of joint toxicity profiles as was observed previously for acute toxicity of major ions to this species. Mathematical models describing the response of these organisms were developed to predict the toxicity of major ion mixtures based on either chemical activity or chemical concentrations of ions in the mixture. These models showed good agreement with independent literature data on the chronic toxicity of major ion salts or ion mixtures to C. dubia. The datasets associated with this effort provide effect concentrations (EC20 and EC50) for 60 chronic toxicity tests conducted as part of this research, along with literature data extracted for comparison with model predictions. Data generated in this effort will inform efforts by OW, Regions, States, and Tribes to develop water quality standards/criteria for specific major ions (e.g., Cl, SO4). Perhaps more importantly, it provides part of the necessary scientific underpinning for developing standards/criteria that are sensitive to the specific composition of different sources of ion enrichment (e.g., produced water, mine drainage, irrigation return, industrial/municipal effluents) and can therefore support development of robust, integrated assessment tools. This dataset is associated with the following publication: Mount, D., R. Erickson, B. Forsman, T. Highland, R. Hockett, D. Hoff, C. Jenson, and T. Norberg-King. Chronic toxicity of major ion salts and their mixtures to Ceriodaphnia dubia. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, USA, 38(4): 769-783, (2019).

This dataset provides concentration-response data and associated general chemistry conditions for 26 experiments consisting of 149 tests regarding the acute toxicity of major ions to Ceriodaphnia dubia in a variety of test waters; it also provides LC50 estimates and the estimated ion mixtures at the LC50 for each toxicity test. This dataset is associated with the following publication: Mount , D., R. Erickson , T. Highland , R. Hockett , D. Hoff , T. Norberg-King , K. Peterson, Z. Polaske, and S. Wisniewski. The acute toxicity of major ion salts to Ceriodaphnia dubia: I. Influence of background water chemistry. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, USA, 35(12): 3039-3057, (2016).

This dataset provides concentration-response data and associated general chemistry conditions for 29 experiments consisting of 209 tests regarding the acute toxicity of binary mixtures of major ions to Ceriodaphnia dubia; it also provides LC50 estimates and the estimated ion mixtures at the LC50 for each toxicity test. This dataset is associated with the following publication: Erickson, R., D. Mount, T. Highland, R. Hockett, D. Hoff, C. Jenson, T. Norberg-King, and K. Peterson. The acute toxicity of major ion salts to Ceriodaphnia dubia. II. Empirical relationships in binary salt mixtures. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, USA, 36(6): 1525-1537, (2017).

The dataset contains the outputs for the analogue searches conducted for the chemical of interest, p,p'-DDD. This dataset is associated with the following publication: Lizarraga, L., J. Dean, J. Kaiser, S. Wesselkamper, J. Lambert, and J. Zhao. A Case Study on the Application of An Expert-driven Read-Across Approach in Support of Quantitative Risk Assessment of p,p’-Dichlorodiphenyldichloroethane. REGULATORY TOXICOLOGY AND PHARMACOLOGY. Elsevier Science Ltd, New York, NY, USA, 103: 301-313, (2019).

This dataset provides concentration-response data and associated general chemistry conditions for 32 experiments consisting of 177 toxicity tests regarding the acute toxicity of individual major ion salts and binary mixtures of major ions to Ceriodaphnia dubia; it also provides LC50 estimates and the estimated chemistries at the LC50 for each toxicity test. This dataset is associated with the following publication: Erickson, R., D. Mount, T. Highland, J. Hockett, D. Hoff, C. Jenson, T. Norberg-King, and B. Forsman. Acute Toxicity of Major Geochemical Ions to Fathead Minnows (Pimephales promelas). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, USA, n/a - n/a, (2022).

A simple quantitative bioassay was developed using widely available technology to determine pre-emergent phytotoxicity. Digitaria didactyla (Queensland Blue Couch Grass) was assessed by analysing digital images of the plants growing in microtitre plates for the effects of herbicides on germination. The herbicides tested were metsulfuron, triasulfuron, fluometuron atrazine, simazine and prometryn. Images of each 24-well microtitre plate (taken with a digital camera 7-10 days after planting), were analysed using a public domain image processing program, and a filter (developed using plugins available within the program) selected pixels within the green spectrum. Pixel counting took place using a spreadsheet function. To investigate the use of microtitre plates for the discovery of phytotoxic compounds within higher plants. This bioassay system allows rapid throughput of test samples with minimum handling.