Causal Analysis/Diagnosis Decision Information System (CADDIS)
The Causal Analysis/Diagnosis Decision Information System, or CADDIS, is designed to help scientists and resource managers in the Regions, States, and Tribes conduct causal assessments in aquatic systems. It provides a weight-of-evidence approach for identifying causes of biological impairment (Volume 1), along with information, examples, and tools to help with this process (Volumes 2-5).
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Basic CADDIS Information
Learn what CADDIS is, how and why it was developed, and how it can be used.
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Volume 1. Stressor Identification
Learn about Stressor Identification, the weight-of-evidence approach used to identify the most likely cause or causes of undesirable biological effects.
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Volume 2. Sources, Stressors, and Responses
Learn more about common sources and stressors that can negatively affect biological condition in aquatic ecosystems.
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Volume 3. Examples and Applications
See how the CADDIS framework has been used to examine causes of biological impairments across different locations, stressors, and habitats.
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Volume 4. Data Analysis
Learn more about how to use different analytical techniques to generate and evaluate evidence in causal assessments.
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Volume 5. Causal Databases
Explore tools to find, store, and display evidence from scientific literature to evaluate different causal pathways in an assessment.