Characteristics of EDT

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Characteristics of EDT
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Ecosystem Diagnosis and Treatment

• Ecosystem Description of biological and
  physical habitat

• Diagnosis Assessment of health of the habitat
  with respect to a fish or wildlife species

A healthy environment is one that results in
productive and sustainable populations of the
target species and achieves the social ends
described in the vision.

• Treatment Change in the habitat as a result of
  strategies

gt Plan of action
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EDT is an Explanatory Model

• Organizes available knowledge to describe
  habitat and FW Expert System.

• Based on rules derived from

-- Empirical data
-- Scientific literature
Experts Panel
-- Expert opinion (EWG, SSC and others)
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EDT is an Equilibrium model

• Focus is on long-term vision

-- Not on short-term actions or time lines

• Describes the end-state condition of
• an alternative.

-- All strategies fully implemented and their
impacts fully realized.
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• Habitat described for each life stage

• Fish or wildlife routed over their life history

• Cumulative impact over the entire life history

• Life history diversity evaluated

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Basic Assumptions of EDT

• Density dependence Survival for any life stage
  is dependent on abundance and is limited by the
  carrying capacity of the habitat
• Habitat structure Habitat characteristics
  determine biological performance.
• Biological performance Performance of
  populations and species can be measured in
  terms of capacity, productivity (return/spawner)
  and life history diversity

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Density Dependence
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Performance includes diversity in life histories
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How EDT Works
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1. Describe the habitat
For 7,500 geographic units (HUC-6s)
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Columbia River Basin HUC-6s
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2. Characterize the Biological Potential
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3. Evaluate habitat for specific species
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4. Calculate Performance Capacity and
Productivity

• 19 Biological Metrics
• for each species and life stage.
• Metrics are survival as a function of
• temperature
• sediment
• food
• water quality
• etc.

Rules
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5. Calculate performance Life History Diversity
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Framework Ecological Provinces
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The EDT Knowledge Base
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Components of the Knowledge Base
Research/ Evaluation
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Types of data in EDT
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Rules link data types
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Whats next?
Framework Analysis
Amendment Process
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Ecosystem Diagnosis and Treatment

• Ecosystem Description of biological and
  physical habitat

• Diagnosis Assessment of health of the habitat
  with respect to a fish or wildlife species

A healthy environment is one that results in
productive and sustainable populations of the
target species and achieves the social ends
described in the vision.

• Treatment Change in the habitat as a result of
  strategies

gt Plan of action
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Statistical v. Explanatory Model
Alternative ways of looking at flow/survival