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Draft Multimetric Indices for Colorado

Draft Multimetric Indices for Colorado. Data Preparation. Established reference and stressed criteria Identified reference and stressed sites Classified sites – mountains, plains, xeric. Ecoregions. 20 Colorado Plateaus 21 Southern Rockies 22 Arizona/New Mexico Plateau

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Draft Multimetric Indices for Colorado

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  1. Draft Multimetric Indices for Colorado

  2. Data Preparation • Established reference and stressed criteria • Identified reference and stressed sites • Classified sites – mountains, plains, xeric

  3. Ecoregions 20 Colorado Plateaus 21 Southern Rockies 22 Arizona/New Mexico Plateau 25 Western High Plains 26 Southwestern Tablelands

  4. Bioregions 1 Mountains 2 Plains 3 Xeric

  5. Data Preparation • Established reference and stressed criteria • Established reference and stressed sites • Classified sites – mountains, plains, xeric • Established consistent taxonomic rules (OTU) • Assembled metrics • Removed site duplicates and replicates

  6. Metric Evaluation • Looked at metric range and variability by region • Considered metric ecological “sense” • Investigated metrics discrimination efficiency (DE) • Ability to discriminate a priori reference from stressed (percent stressed < 25th % reference) • Examined metric redundancy • First principles (ie E taxa and EPT taxa) • Pearson product-moment correlation

  7. Metric Scoring • Scored candidate metrics from 0-100 based on 5th and 95th percentiles • Decreaser scores = 100*(value/95th) • Increaser scores = 100*[(Max-value)/(95th-5th)]

  8. Index Construction • Constructed at least 10 potential indices using variable combinations of candidate metrics for each region • Minimized redundancy • Maximized categorical representation • Composition, richness, tolerance, habit, and functional feeding • Calculated index DE

  9. Mountains

  10. Mountains – Draft Indices • Index 2 Composition • Percent Chironomidae which are Cricotopus and Chironomus Richness • Total Taxa Tolerance • HBI • Percent Tolerant • Percent Trichoptera which are Hydropsychidae • Index 1 Composition • Percent Chironomidae which are Cricotopus and Chironomus Richness • Diptera Taxa • EPT Taxa Tolerance • Percent Tolerant • Percent Trichoptera which are Hydropsychidae

  11. Mountains – Draft Indices Index 1 Composition • Percent Chironomidae which are Cricotopus and Chironomus Richness • Diptera Taxa • EPT Taxa Tolerance • Percent Tolerant • Percent Trichoptera which are Hydropsychidae DE = 85% CV = 8%

  12. Mountains – Draft Indices Index 2 Composition • Percent Chironomidae which are Cricotopus and Chironomus Richness • Total Taxa Tolerance • Percent Tolerant • Percent Trichoptera which are Hydropsychidae DE = 90% CV = 8%

  13. Mountains • Richest dataset • Reference and stressed sites variable • Discrimination Efficiencies were good • 3/5 categories represented

  14. Plains

  15. Plains – Draft Indices • Index 1 Composition • Percent Chironomidae which are Cricotopus and Chironomus • Percent Diptera • Percent Oligochaete Richness • EPT Taxa Tolerance • HBI Habit • Clinger Taxa • Index 2 Composition • Percent Chironomidae which are Cricotopus and Chironomus • Percent Diptera • Percent Oligochaete • Percent EPT Tolerance • HBI Trophic • Percent Predators • Index 3 Composition • Percent Chironomidae which are Cricotopus and Chironomus • Percent Diptera • Percent Oligochaete Richness • EPT Taxa Tolerance • HBI Habit • Percent Sprawlers

  16. Plains – Draft Indices Index 1 Composition • Percent Chironomidae which are Cricotopus and Chironomus • Percent Diptera • Percent Oligochaete Richness • EPT Taxa Tolerance • HBI Habit • Clinger Taxa DE = 100% CV = 20%

  17. Plains – Draft Indices Index 2 Composition • Percent Chironomidae which are Cricotopus and Chironomus • Percent Diptera • Percent Oligochaete • Percent EPT Tolerance • HBI Trophic • Percent Predators DE = 100% CV = 19%

  18. Plains – Draft Indices Index 3 Composition • Percent Chironomidae which are Cricotopus and Chironomus • Percent Diptera • Percent Oligochaete Richness • EPT Taxa Tolerance • HBI Habit • Percent Sprawlers DE = 100% CV = 17%

  19. Plains • Fewer reference and stressed sites • Discrimination Efficiencies 100% • 3/5 to 4/5 categories represented

  20. Xeric

  21. Xeric – Draft Indices • Index 1 Composition • Percent Coleoptera • Percent Ephemeroptera Richness • EPT Taxa Tolerance • Percent Dominant • Percent EPT which are Hydropsychidae Habit • Sprawler Taxa Trophic • Percent Filterers • Index 2 Composition • Percent Coleoptera • Percent Ephemeroptera Richness Tolerance • Percent Dominant • Percent EPT which are Hydropsychidae Habit • Sprawler Taxa Trophic • Percent Filterers • Index 3 Composition • Percent Coleoptera • Percent Ephemeroptera Richness Tolerance • HBI • Percent Dominant • Percent EPT which are Hydropsychidae Habit • Percent Sprawler Trophic • Percent Filterers

  22. Xeric – Draft Indices Index 1 Composition • Percent Coleoptera • Percent Ephemeroptera Richness • EPT Taxa Tolerance • Percent Dominant • Percent EPT which are Hydropsychidae Habit • Sprawler Taxa Trophic • Percent Filterers DE = 72% CV = 13%

  23. Xeric – Draft Indices Index 2 Composition • Percent Coleoptera • Percent Ephemeroptera Richness Tolerance • Percent Dominant • Percent EPT which are Hydropsychidae Habit • Sprawler Taxa Trophic • Percent Filterers DE = 94% CV = 8%

  24. Xeric – Draft Indices Index 3 Composition • Percent Coleoptera • Percent Ephemeroptera Richness Tolerance • HBI • Percent Dominant • Percent EPT which are Hydropsychidae Habit • Percent Sprawler Trophic • Percent Filterers DE= 94% CV = 7%

  25. Xeric • Fewer reference sites • Discrimination Efficiencies were very good • 4/5 to 5/5 categories represented

  26. Review Mountains MMI Composition • Percent Chironomidae which are Cricotopus and Chironomus Richness • Diptera Taxa • EPT Taxa Tolerance • Percent Tolerant • Percent Trichoptera which are Hydropsychidae Plains MMI Composition • Percent Chironomidae which are Cricotopus and Chironomus • Percent Diptera • Percent Oligochaete Richness • EPT Taxa Tolerance • HBI Habit • Percent Sprawlers Xeric MMI Composition • Percent Coleoptera • Percent Ephemeroptera Tolerance • HBI • Percent Dominant • Percent EPT which are Hydropsychidae Habit • Percent Sprawler Trophic • Percent Filterers

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