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R I O H s - Rio Grande Silvery Minnow Index of Habitat Health

R I O H s - Rio Grande Silvery Minnow Index of Habitat Health. Joel D. Lusk and Cyndie Abeyta U.S. Fish and Wildlife Service Bosque Hydrology Group Water Quality Summit Meeting October 25, 2004. Water Quality & the Silvery Minnow.

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R I O H s - Rio Grande Silvery Minnow Index of Habitat Health

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  1. R I O Hs - Rio Grande Silvery Minnow Index of Habitat Health Joel D. Lusk and Cyndie Abeyta U.S. Fish and Wildlife Service Bosque Hydrology Group Water Quality Summit Meeting October 25, 2004

  2. Water Quality & the Silvery Minnow • Water Quality – is the ecological quality of the Rio Grande necessary for the silvery minnow to survive: • Chemical Factors • Flow Regime • Biotic Factors • Physical Habitat • Energy Sources

  3. Integrity of Silvery Minnow Habitat CHEMICAL VARIABLES FLOW REGIME HABITAT STRUCTURE BIOTIC FACTORS ENERGY SOURCE

  4. Chemical Factors of RGSM Habitat

  5. Flow Regime of RGSM Habitat

  6. Biotic Factors of RGSM Habitat

  7. Physical Features of RGSM Habitat

  8. Chemical Factors of RGSM Habitat

  9. Integrity of Silvery Minnow Habitat CHEMICAL VARIABLES FLOW REGIME HABITAT STRUCTURE BIOTIC FACTORS ENERGY SOURCE

  10. Integrated Water Quality Study • Our Water Quality Assessment worked with Fishery Resources, Water Resources, and others to measure these qualities of the Middle Rio Grande in 2002-03.

  11. RIOHs - Ranking Chemical Quality • Compare measured chemicals to: • Water quality criteria • Sediment quality criteria • Tissue quality criteria • Regional nutrient guidelines • Temperature regimes • Dissolved oxygen regimes • Provide rank to all comparisons • 5 = good, none exceed of criteria • 3 = fair, few exceed of criteria • 1 = poor, many exceed criteria

  12. RIOHs - Ranking Physical Quality • Riverscape Quality • Riparian Width • River Width • Width to Depth Ratio • Shoreline Complexity Index • Silvery minnow habitat quality • Depths < 20 cm • Velocity < 30 cm/sec • Nonfluvial Mesohabitats (pools, etc.) • Provide “5-3-1” ranks to all comparisons

  13. RIOHs - Ranking Biological Quality • Fish Health Assessment • Condition Factor • Normality Index • Severity Index • Feeding Index • Fish Community Metrics • Presence of silvery minnow • Number of native fish species • Energy Sources • Gross Primary Productivity

  14. RIOHs – 4 Site Chemical Example

  15. RIOHs – 4 Site Physical Example

  16. RIOHs – 4 Site Biological Example

  17. RIOHs –Example Results of 4 Sites

  18. RIOHs Impact Analysis – Percent and Type of Impairment

  19. RIOHs – Rio Grande Silvery Minnow Index of Habitat Health • RIOHs is an index to assess the ecological integrity of silvery minnow habitat • RIOHs integrates landscape, habitat, fish health, productivity, and chemical factors – Can be expanded! (algae?). • RIOHs identifies impaired sites and prioritizes how to restore them • RIOHs = can help link Science, Management, and Outreach for Recovery.

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