draft multimetric indices for colorado. data preparation established reference and stressed criteria...
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Draft Multimetric Indices for Colorado
Data Preparation
Established reference and stressed criteria Identified reference and stressed sites
Classified sites – mountains, plains, xeric
Ecoregions
Colorado Ref NMS
Axis 1
Axi
s 2
Eco_L3
2021222526
Colorado Ref NMS
Axis 1
Axi
s 3
Eco_L3
2021222526
Colorado Ref NMS
Axis 2
Axi
s 3
Eco_L3
20 Colorado Plateaus21 Southern Rockies22 AZ-NM Plateau25 Western High Plains26 SW Tablelands
20 Colorado Plateaus21 Southern Rockies22 Arizona/New Mexico Plateau25 Western High Plains26 Southwestern Tablelands
Colorado Ref NMS
Axis 1
Axi
s 2
BioRegNm
1 Mountains2 Plains3 Xeric
Colorado Ref NMS
Axis 1
Axi
s 3
BioRegNm
123
Colorado Ref NMS
Axis 2
Axi
s 3
BioRegNm
123 Bioregions
1 Mountains2 Plains3 Xeric
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
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
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)]
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
Mountains
Mountains – Draft Indices Index 1Composition Percent Chironomidae which are
Cricotopus and Chironomus
Richness Diptera Taxa EPT Taxa
Tolerance Percent Tolerant Percent Trichoptera which are
Hydropsychidae
Index 2Composition Percent Chironomidae which are
Cricotopus and Chironomus
Richness Total Taxa
Tolerance HBI Percent Tolerant Percent Trichoptera which are
Hydropsychidae
Median 25% -75% Non-Outlie r Range Outlie rs E xtremes
Ref S tressed30
40
50
60
70
80
90
100
Mou
ntai
ns In
dex
1
Mountains – Draft IndicesIndex 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%
Median 25% -75% Non-Outlie r Range Outlie rs E xtremes
Ref S tressed30
40
50
60
70
80
90
100
Mou
ntai
ns In
dex
2
Mountains – Draft IndicesIndex 2
Composition Percent Chironomidae
which are Cricotopus and Chironomus
Richness Total Taxa
Tolerance Percent Tolerant Percent Trichoptera
which are Hydropsychidae
DE = 90%CV = 8%
Mountains
Richest dataset Reference and stressed sites variable Discrimination Efficiencies were good 3/5 categories represented
Plains
Plains – Draft Indices
Index 2Composition Percent
Chironomidae which are Cricotopus and Chironomus
Percent Diptera Percent Oligochaete Percent EPT
Tolerance HBI
Trophic Percent Predators
Index 3Composition Percent
Chironomidae which are Cricotopus and Chironomus
Percent Diptera Percent Oligochaete
Richness EPT Taxa
Tolerance HBI
Habit Percent Sprawlers
Index 1Composition Percent
Chironomidae which are Cricotopus and Chironomus
Percent Diptera Percent Oligochaete
Richness EPT Taxa
Tolerance HBI
Habit Clinger Taxa
Median 25% -75% Non-Outlie r Range Outlie rs E xtremes
Ref S tressed20
30
40
50
60
70
80
90
100
Pla
ins
Inde
x 1
Plains – Draft Indices
DE = 100%CV = 20%
Index 1Composition Percent
Chironomidae which are Cricotopus and Chironomus
Percent Diptera Percent Oligochaete
Richness EPT Taxa
Tolerance HBI
Habit Clinger Taxa
Median 25% -75% Non-Outlie r Range Outlie rs E xtremes
Ref S tressed20
30
40
50
60
70
80
90
100
Pla
ins
Inde
x 2
Plains – Draft IndicesIndex 2
Composition Percent
Chironomidae which are Cricotopus and Chironomus
Percent Diptera Percent Oligochaete Percent EPT
Tolerance HBI
Trophic Percent Predators
DE = 100%CV = 19%
Median 25% -75% Non-Outlie r Range Outlie rs E xtremes
Ref S tressed20
30
40
50
60
70
80
90
100
Pla
ins
Inde
x 3
Plains – Draft IndicesIndex 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%
Plains
Fewer reference and stressed sites Discrimination Efficiencies 100% 3/5 to 4/5 categories represented
Xeric
Xeric – Draft Indices
Index 2Composition Percent Coleoptera Percent
Ephemeroptera
Richness
Tolerance
Percent Dominant Percent EPT which
are Hydropsychidae
Habit Sprawler Taxa
Trophic Percent Filterers
Index 3Composition Percent Coleoptera Percent
Ephemeroptera
Richness
Tolerance HBI Percent Dominant Percent EPT which
are Hydropsychidae
Habit Percent Sprawler
Trophic Percent Filterers
Index 1Composition Percent Coleoptera Percent
Ephemeroptera
Richness EPT Taxa
Tolerance
Percent Dominant Percent EPT which
are Hydropsychidae
Habit Sprawler Taxa
Trophic Percent Filterers
Median 25% -75% Non-Outlie r Range Outlie rs E xtremes
Ref S tressed40
45
50
55
60
65
70
75
80
85
Xer
ic In
dex
1
Xeric – Draft IndicesIndex 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%
Median 25% -75% Non-Outlie r Range Outlie rs E xtremes
Ref S tressed40
45
50
55
60
65
70
75
80
85
Xer
ic In
dex
2
Xeric – Draft IndicesIndex 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%
Median 25% -75% Non-Outlie r Range Outlie rs E xtremes
Ref S tressed40
45
50
55
60
65
70
75
80
85
Xer
ic In
dex
3
Xeric – Draft IndicesIndex 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%
Xeric
Fewer reference sites Discrimination Efficiencies were very good 4/5 to 5/5 categories represented
ReviewMountains MMI
Composition Percent Chironomidae
which are Cricotopus and Chironomus
Richness Diptera Taxa EPT Taxa
Tolerance Percent Tolerant Percent Trichoptera
which are Hydropsychidae
Plains MMIComposition Percent
Chironomidae which are Cricotopus and Chironomus
Percent Diptera Percent Oligochaete
Richness EPT Taxa
Tolerance HBI
Habit Percent Sprawlers
Xeric MMIComposition Percent Coleoptera Percent
Ephemeroptera
Tolerance HBI Percent Dominant Percent EPT which
are Hydropsychidae
Habit Percent Sprawler
Trophic Percent Filterers
DE = 85%
CV = 8%
Ref Mean = 82
Str Mean = 68
DE = 100%
CV = 17%
Ref Mean = 74
Str Mean = 43
DE = 94%
CV = 7%
Ref Mean = 67
Str Mean = 60