Data and Tools

This page shows all of the pages at www.epa.gov that are tagged with Data and Tools.

  • Loading Data into R

    Scripts for loading data into R.

  • Using Taxon-Environment Relationships: Assign Operational Taxonomic Units

    Step instructions for assigning operational taxonomic units.

  • Computing Inferences: Weighted Average Inferences

    This page describes a weighted average approach for inferring environmental conditions.

  • Estimating Taxon-Environment Relationships: Parametric Regressions

    This page describes the parametric regression approach to estimating species-environment relationship.

  • Using Taxon-Environment Relationships: Compute Biological Inferences

    Step instructions for computing inferred environmental conditions.

  • SSD Plots

    Species sensitivity distributions, cadmium, LC50, ECOTOX, arthropod

  • R Script: Non-Parametric Regression

    How to Fit Non-Parametric Curves to Observations

  • Estimating Taxon-Environment Relationships: Assessing Model Fit

    This page describes several approaches for assessing model fit for species-environment models.

  • R Script: Compute Area Under ROC Curve

    How to compute the area under the ROC curve in data analysis.

  • Basic Analyses

    Overview of linear regression analysis and questions to consider when using this type of data analysis.

  • CADStat Installation Instructions

    CADStat is a statistical program designed to assist risk assessors with data analysis.

  • Ammonia

    This page covers the ammonia module, including when to list ammonia as a candidate cause, ways to measure ammonia, simple and detailed conceptual diagrams for ammonia, and literature reviews and references for the ammonia module.

  • Herbicides

    This page includes an introduction to the herbicides module, when to list herbicides as a candidate cause, ways to measure herbicides, simple and detailed conceptual diagrams for herbicides, herbicides module references and literature reviews.

  • Sediments

    This page introduces the sediments module, when to list sediments as a candidate cause, ways to measure sediments, simple and detailed conceptual diagrams for sediments, sediments module references and literature reviews.

  • Nutrients

    This page introduces to the nutrients module, when to list nutrients as a candidate cause, ways to measure nutrients, simple and detailed conceptual diagrams for nutrients, and module references and literature reviews.

  • Urbanization - Stormwater Runoff

    This page introduces you to impervious surfaces associated with urbanization,and includes background information on how impervious surfaces affect biotic condition and threshold values of impervious surfaces.

  • Temperature

    This page introduces the temperature module, when to list temperature as a candidate cause, ways to measure temperature, simple and detailed conceptual diagrams for temperature, temperature module references and literature reviews.

  • About Conceptual Diagrams

    This page gives background information on what conceptual diagrams are and how they are used in CADDIS.

  • Urbanization - Hydrology

    This page includes hydrologic changes, baseflow changes, water withdrawals and interbasin transfers associated with urbanization, and biotic responses to hydrologic (or flow) changes associated with urbanization

  • Urbanization - Energy Sources

    This page explains changes in basal energy sources with urbanization, with an overview of terrestrial leaf litter dynamics in urban streams and how urbanization can affect primary production, respiration, and dissolved organic carbon quality.