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Habitat Assessment Modeling: Ecosystem Diagnosis and Treatment

Habitat Assessment Modeling: Ecosystem Diagnosis and Treatment. Environment and Habitat. Environment: broad description of conditions at a location Not species specific Sets the metrics Defines appropriate scale, hierarchy, extent and grain

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Habitat Assessment Modeling: Ecosystem Diagnosis and Treatment

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  1. Habitat Assessment Modeling: Ecosystem Diagnosis and Treatment

  2. Environment and Habitat • Environment: broad description of conditions at a location • Not species specific • Sets the metrics • Defines appropriate scale, hierarchy, extent and grain • Habitat: species specific description of conditions at a location • Species specific subset of environment • Relates to biological performance of focal species

  3. Habitat Assessment Environment Recovery Geology and Climate Actions Appraisal for a species Environmental Processes Habitat Description Environmental Pattern Habitat Rehabilitation Process --Hydrology --Sediment mechanics --Channel dynamics --Riparian function --Appropriate scale and hierarchy --Metrics --Extent --Grain

  4. Assessment: Species-focused rating of habitat • How much habitat is there? • Quantity: Biological capacity • How good is it? • Quality: Productivity • Connectivity: Life history trajectories • Breadth: Trajectory diversity

  5. Ecosystem Diagnosis and Treatment (EDT) • EDT rates the quality and quantity of habitat with respect to one or more focal species. • EDT identifies restoration and protection priorities and limiting conditions • Where do we start? • What needs to be fixed? • EDT is NOT a dynamic population dynamics model. • It rates a static depiction of habitat conditions. • EDT does NOT PROVE ANYTHING. • It creates a testable working hypothesis as a basis for action.

  6. Habitat and population models: essential tools for recovery planning

  7. Current Space (stream mile) Degradation Template Restoration Template Environmental Conditions Assessment provides restoration and protection priorities Protection Restoration

  8. EDT prioritizes habitat based on biological performance

  9. Monthly shaping of flow, temperature and width EDT Environmental Description Hydrography: HUC-6/Reaches Environmental Attributes (45) Habitat Assessment ProcessI. Prepare EDT Input Table = Snap-shot of conditions

  10. Life stage-survival rules Life Stage Reaches Biological Environmental Description Capacity & Productivity Descriptors Habitat Descriptors Habitat Assessment ProcessII. Rate the Habitat

  11. Life history/Population structure Population Capacity and Productivity Habitat Assessment ProcessIII. Rate the Watershed

  12. Validation of a habitat assessment model • Does the biological rating metric comport with reality? • Does it accurately predict distribution of the rating species? • It it useful?

  13. Validation of EDT for Spring Chinook in the Yakima River. 1981-94 broods. Validation of EDT for Spring Chinook in the Yakima River. 1981-94 broods. Source: Bruce Watson, YIN

  14. Case Study: Johnson Creek, Portland, OR

  15. Johnson Study Area Map

  16. EDT Population Estimates

  17. Priorities Combined priorities for rehabilitation of Johnson Creek habitat for coho salmon

  18. Reach 15 Attributes

  19. EDT habitat assessment Restoration Priorities Protection Priorities Impervious surfaces impairing processes Impervious areas not impairing processes Prioritize and restore Impervious areas Example of how EDT can relate to watershed actions Modified from Roni et al. (2002): A review of stream restoration techniques and a hierarchical strategy for prioritizing restoration in Pacific Northwest Watersheds. N.Am.J.Fish. Mgmt.22:1-20

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