Science & Technology

Linear Regression: EPT Taxa Richness vs. Percent Sand and Fines for Minnesota Streams

This section provides examples of stressor-response associations and species sensitivity distributions for common stressors.

Quantile Regression: EPT Relative Abundance vs. Percent Sands and Fines for Minnesota Streams

This section provides examples of stressor-response associations and species sensitivity distributions for common stressors.

Linear Regression: Chironomid Richness vs. Metal Toxicity Units for Colorado Streams

This section provides examples of stressor-response associations and species sensitivity distributions for common stressors.

Conditional Probability Analysis: Chlorophyll a > 30 vs. Total Phosphorus for Northeast Lakes

This section provides examples of stressor-response associations and species sensitivity distributions for common stressors.

Linear Regression: Number of Salmonids vs. Metal Toxicity Units

This section provides examples of stressor-response associations and species sensitivity distributions for common stressors.

Quantile Regression: EPT Taxa Richness vs. Metal Toxicity Units for Colorado Streams

This section provides examples of stressor-response associations and species sensitivity distributions for common stressors.

Watershed Academy Webcast: EPA Releases First Ever National Wetland Condition Assessment

Presentation from June 16, 2016 webcast.

Federal Guidance Report No. 13: CD Supplement

Order a CD from EPA which contains PDFs and other supporting materials related to Federal Guidance Report No. 13, "Cancer Risk Coefficients for Environmental Exposure to Radionuclides."

Learn About Sources

This is the introductory page to the sources module.

Introduction to urbanization and its effects of streams, a summary of the urban stream syndrome,an overview of the effects of urbanization on biotic integrity, a summary of catchment vs. riparian urbanization vs. reach.

CADDIS Volume 2: Sources, Stressors and Responses

CADDIS Volume 2 landing page -- Learn more about common sources and stressors that can negatively affect biological condition in aquatic ecosystems.

Manipulation of Exposure at Other Sites

This page explains how to derive and evaluate evidence using studies from other locations that manipulate exposure.

Summary Tables of Types of Evidence

This page includes a summary table to various types of evidence, illustrations, explanations, and their supporting pages.

Symptoms

This page shows how to derive and evaluate evidence using symptoms.

Stressor-Response Relationships from Ecological Simulation Models

How to derive and evaluate evidence using stressor-response relationships from ecological simulation models

Causal Pathway

How to derive and evaluate evidence of a Causal Pathway

Analogous Stressors

How to derive and evaluate evidence from analogous stressors

Quantifying Uncertainty in Causal Analysis

Overview and details of quantifying uncertainty

Getting Started

This page provides a guide overview to the step-by-step guide to Stressor Identification, and fundamentals of causal assessment.

Step 5. Identify Probable Causes

This page includes an overview of Step 5, to identify probable cause, then weighing evidence for a candidate cause, comparing evidence across causes, and analyzing the expected output of the causal assessment.