Science & Technology

Metals - Point Source Releases

This page contains a table of point sources for metals releases to air, water and land pulled from the Toxic's Release Inventory (2002).

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

Conditional Probability Analysis: EPT Taxa Richness < 9 vs. Percent Fines for Mid-Atlantic Highland Streams

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

Quantile Regression: Number of Salmonids vs. Metal Toxicity Units for Colorado Streams

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

Worksheet Examples

14 Worksheets based on the Little Scioto River, Ohio case study included as an example.

Basic Principles & Issues

Basic principles for data analysis uses inferential statistics, data independence and autocorrelation methods to identify and control confounding variables.

Conditional Probability Analysis: Fish IBI < 40 vs. Total Suspended Solids for Iowa Streams

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

Linear Regression: Non-insect 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.

State Examples

This page includes examples of state and other regulatory entities use of the CADDIS application in causal analysis.

Basic Analyses

Overview of quantile regression analysis includes insight on simplifying assumptions.

Estimating Taxon-Environment Relationships: Data Requirements

Overview of PECBO Module, using scripts to infer environmental conditions from biological observations, statistically estimating species-environment relationships, methods for inferring environmental conditions, statistical scripts in module.

R Script: Parametric Regression

How to Fit Parametric Regression Models to Observations.

Using R to Estimate Taxon-Environment Relationships

This page describes steps for estimating species-environment relationships using on-line library.

PECBO Appendix Introduction: Definitions

Provides definitions used through the module

Estimating Taxon-Environment Relationships: Measurement Error

This page describes effects of measurement error on regression models for species-environment relationship.

Estimating Taxon-Environment Relationships: Survey Weighting

This page describes the use of probability weighted data for estimating species-environment relationships.

Computing Inferences: Categorical Tolerance Data

This page describes the use of categorical tolerance data for assessing site conditions.

Using R to Compute Weighted Average Inferences

Script for inferring environmental conditions using weighted average optima

Computing Inferences: Maximum Likelihood Inferences

This page describes the maximum likelihood approach for inferring environmental conditions.

Basic Analyses

Overview of using classification and regression trees (CART) includes assumptions in CART analysis, and insight on pruning regression trees, .