Science Inventory

THE CAUSAL ANALYSIS / DIAGNOSIS DECISION INFORMATION SYSTEM (CADDIS) - 2007 UPDATE

Notice:

[9/2007] EPA is announcing that CADDIS 2007 is available in an October 4, 2007 Federal Register Notice. To get directly to the CADDIS 2007 Application, go to http://www.epa.gov/caddis.

Citation:

Impact/Purpose:

Develop an on-line decision support system that helps investigators in the regions, states and tribes find, access, organize, use and share information to produce causal evaluations of biological impairments in aquatic systems.

Description:

CADDIS is an on-line decision support system that helps investigators in the regions, states and tribes find, access, organize, use and share information to produce causal evaluations in aquatic systems. It is based on the US EPA's Stressor Identification process which is a formal method for identifying causes of impairments in aquatic systems.

CADDIS 2007 increases access to relevant information useful for causal analysis and provides methods and tools that practitioners can use to analyze their own data. The new Candidate Cause section provides overviews of commonly encountered causes of impairments to aquatic systems: metals, sediments, nutrients, flow alteration, temperature, ionic strength, and low dissolved oxygen. CADDIS includes new Conceptual Models that illustrate the relationships from sources to stressors to biological effects. An Interactive Conceptual Model for phosphorus links the diagram with supporting literature citations. The new Analyzing Data section helps practitioners analyze their data sets and interpret and use those results as evidence within the USEPA causal assessment process. Downloadable tools include a graphical user interface statistical package (CADStat), and programs for use with the freeware R statistical package, and a Microsoft Excel template. These tools can be used to quantify associations between causes and biological impairments using innovative methods such as species-sensitivity distributions, biological inferences, conditional probability analysis, and quantile regression analysis. New Databases have been added that provide stressor-response associations based on laboratory toxicity tests of metals and field observational data.

URLs/Downloads:

FR NOTICE: MARCH 23, 2007   Exit

CAUSAL ANALYSIS / DIAGNOSIS DECISION INFORMATION SYSTEM (CADDIS)

PR NOTICE: JANUARY 25, 2006

A Case Study: Causal Analysis of Biological Impairment in Long Creek: A Sandy-Bottomed Stream in Coastal Southern Maine

FR NOTICE: OCT 4, 2007   Exit

FRAMEWORK FOR DEVELOPING SUSPENDED AND BEDDED SEDIMENT (SABS) WATER QUALITY CRITERIA

WATER QUALITY STANDARDS DATABASE (WQSDB)

EPA'S BIOCRITERIA PROGRAM

FR NOTICE: JANUARY 17, 2007   Exit

FR NOTICE: APRIL 27, 2005   Exit

Record Details:

Record Type: DOCUMENT
Product Published Date: 01/24/2006
Record Last Revised: 09/25/2014
OMB Category: Influential
Record ID: 57027

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL CENTER FOR ENVIRONMENTAL ASSESSMENT

WASHINGTON DC

EXPOSURE ANALYSIS AND RISK CHARACTERIZATION GROUP