evaluation of aquatic ecosystem health using a multi-metric index of biological integrity for...
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Evaluation of Aquatic Ecosystem Health Evaluation of Aquatic Ecosystem Health Using a Multi-metric Index of Biological Using a Multi-metric Index of Biological
Integrity for Okanagan StreamsIntegrity for Okanagan Streams
Benthic invertebrates are sedentary Benthic invertebrates are sedentary and integrate aquatic impacts and integrate aquatic impacts (chemical, physical, biological). (chemical, physical, biological).
Integration over long time periods.Integration over long time periods.
Benthic invertebrates are a direct Benthic invertebrates are a direct measure of the ecosystem to be measure of the ecosystem to be protected and not surrogate such as protected and not surrogate such as a chemical concentration, physical a chemical concentration, physical habitat measure etc.habitat measure etc.
Benthic Invertebrates
21 Benthic invertebrate measures or 21 Benthic invertebrate measures or metrics tested for predictable response to metrics tested for predictable response to increasing environmental disturbance e.g.increasing environmental disturbance e.g.
Decrease in total # taxaDecrease in total # taxa Decrease in plecoptera, ephemeroptera and Decrease in plecoptera, ephemeroptera and
trichopteratrichoptera Increase in % tolerantsIncrease in % tolerants Increase in dominanceIncrease in dominance Decrease in % predators, clinger, and Decrease in % predators, clinger, and
intolerant taxaintolerant taxa
Local evaluation or calibration to find Local evaluation or calibration to find metrics which respond within study area.metrics which respond within study area.
Index of Biological Integrity used in US, Index of Biological Integrity used in US, Japan, Europe- Fish, Birds and PlantsJapan, Europe- Fish, Birds and Plants
Benthic-Index of Biological Integrity
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•22 low elevation streams sampled 1999 to 2001
• Streams chosen to represent a gradient of conditions from low to high human influence.
•Candidate streams chosen and ranked thru discussions with agency staff; satellite image interpretation and habitat evaluation using Alaska Stream Condition Index (ASCI) evaluation process
•Sampled in early October
•3 replicate surber samples
•Sampled in low to moderate gradient riffles
•Water quality
•Sediment quality
Kelowna
Bellevue
McDougall
Powers
Peachland
Trepanier
Greata
Eneas
Trout
Chute
Naramata
OkanaganOkanagan StreamsStreams
NameName ASCI ASCI ScoreScore
LoggedLogged UrbanizationUrbanization OtherOther
PeachlandPeachland 193193 5.45.4 00 Low agLow ag
McDougallMcDougall 178178 <5<5 <2 (rural)<2 (rural) Low agLow ag
ChuteChute 196196 <5<5 00 Low agLow ag
BX ups BX ups VernonVernon
158158 <10<10 <5 (rural)<5 (rural) Low agLow ag
KelownaKelowna 8383 highhigh highhigh Mod agMod ag
BX @ 25BX @ 25thth 7171 highhigh highhigh UndergrndUndergrnd
Ellis nr mthEllis nr mth 9090 highhigh HighHigh Channel’dChannel’d
EneasEneas 8787 highhigh highhigh AgricAgric
Kelowna BX @ 30th
Eneas
Trout nr mthShuttleworthPrairieEllis
GreataBellevuePowersTrapanierInkameep x2Trout upsShortsColdstream upsNaramataShingle
PeachlandChuteMcDougall upsBX ups
Number of Plecoptera Taxa in Okanagan Streams
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0 1 2 3 4 5
Watershed Rank (good=4; poor=1); - shows median
No
. Ple
cop
tera
Tax
a
5
3
1Urban
low impact
low-mod impact
high impact
Perlidae
Acroneuria lycoris
Number of Ephemeroptera Taxa in Okanagan Streams
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
0 1 2 3 4 5
Watershed Rank (good=4; poor=1); - shows median
No
. E
ph
em
ero
pte
ra
5
3
1
Ephemerella grandis
Ephemerellidae
Number of Clinger Taxa in Okanagan Streams
0
1
2
3
4
5
6
7
8
9
10
11
12
0 1 2 3 4 5
Watershed Rank (good=4; poor=1); - shows median
No
. Clin
ger
Tax
a
5
3
1
Elmidae sp.
Coleoptera
Percentage of Tolerant Benthic Invertebrates in Okanagan Streams
0123456789
101112131415161718192021222324252627282930313233
0 1 2 3 4 5Watershed Rank (good=4; poor=1); - shows median
% T
ole
ran
t T
axa
5
1
3
Culicidae
Number of Intolerant Taxa in Okanagan Streams
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
0 1 2 3 4 5
Watershed Rank (good=4 poor=1); - shows median
No
. In
tole
ran
t T
axa
5
3
1
Limnephilidae larva and case
Percent Predators in Okanagan Streams
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 1 2 3 4 5
Watershed Rank (good=4; poor=1); - shows median
% P
reda
tors
5
3
1
Chloroperlidae
Chloroperla coloradensis
Number of Long Lived Benthic Invertebrate Taxa in Okanagan Streams
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
0 1 2 3 4 5
Watershed Rank (good=4; poor=1); - shows median
No
. Lo
ng
Liv
ed T
axa
5
3
1
Megaloptera
Sialis sp.
Number of Benthic Invertebrate Taxa in Okanagan Streams
0123456789
1011121314151617181920212223242526272829
0 1 2 3 4 5
No
. Tax
a
5
3
1
Watershed Rank (good=4; poor=1); - shows median
Metric Cut-Off ValuesMetric Cut-Off Values
Metric Scoring Cut-off Points 1 3 5 Total Number Taxa <9 9-19 >19
Average Number Plecoptera Taxa <1 1-3 >3 Average Number Ephemeroptera Taxa <2 2-4.25 >4.25
Percent Tolerant Taxa >7 2-7 <2 Average Number Clinger Taxa <4 4-8 >8
Total Number of Long Lived Taxa <2 2-4 <4 Number of Intolerant Taxa <0.5 0.5-2 >2
Percent Predator <0.8 0.8-2.8 2.8
Okanagan Mulit-metric Okanagan Mulit-metric ScoreScore
Stream ConditionStream Condition
35-4035-40 ExcellentExcellent
29-3429-34 GoodGood
20-2820-28 FairFair
13-1913-19 PoorPoor
8-128-12 Very PoorVery Poor
8 Metric Okanagan B-IBI
11 33 55 PeachlandPeachland BX @30th BX @30th
Total # TaxaTotal # Taxa <9<9 9-199-19 >19>19 2727 55 13.813.8 33
Av. # PlecopteraAv. # Plecoptera <1<1 1-31-3 >3>3 3.93.9 55 00 11
Av. # EphemeropteraAv. # Ephemeroptera <2<2 2-2-4.254.25
>4.25>4.25 4.84.8 55 1.51.5 11
% Tolerant taxa% Tolerant taxa >7>7 2-72-7 <2<2 1.51.5 55 11.411.4 11
# Clinger Taxa# Clinger Taxa <4<4 4-84-8 >8>8 10.310.3 55 3.93.9 11
Total # Long Lived taxaTotal # Long Lived taxa <2<2 2-42-4 >4>4 4.34.3 55 1.31.3 11
# Intolerant Taxa# Intolerant Taxa <0.5<0.5 0.5-20.5-2 >2>2 3.33.3 55 00 11
% Predators% Predators <0.8<0.8 0.8-0.8-2.82.8
>2.8>2.8 2.42.4 33 0.70.7 11
Metric TotalsMetric Totals 3838 1010
Sampling Location 8 Metric IBI Score Stream Condition
Peachland Cr d/s PID Intake 38 Excellent
Chute Cr @ Glenfir Rd 38 Excellent
BX Cr nr Pleasant Valley Rd 38 Excellent
McDougall Creek @ Shannon L Rd 36 Excellent
Coldstream Cr ups Mun. Res. 34 Good
Trout Cr ups Mun. Res 32 Good
Trepanier Cr @ Hwy 5C overpass 32 Good
Bellevue Cr @ Lakeshore Rd. 32 Good
Lambly Cr @ Westside Rd 30 Good
Greata Cr 29 Good
Inkameep Cr ups 28 Fair
Inkameep Cr nr mth 28 Fair
Shorts Cr @ park 28 Fair
Powers Cr nr mth 24 Fair
Trout Cr nr Hwy 97 bridge 24 Fair
Shingle Cr ups mth 22 Fair
Shuttleworth Cr @ Willow St. 20 Fair
Prairie Cr nr mth 18 Poor
Ellis Cr nr mth 18 Poor
Eneas Cr dns Rosedale 16 Poor
Kelowna Cr ups Pandosy 14 Poor
BX Cr at 30th Ave 10 Very Poor
B-IBI Next StepsB-IBI Next StepsIncorporate August/September 2002 dataIncorporate August/September 2002 dataMultivariate and other analysis of data setMultivariate and other analysis of data setTest a Family level B-IBI for more rapid assessment Test a Family level B-IBI for more rapid assessment work or stewardship group usework or stewardship group useDetermine utility in compliance monitoring, and stream Determine utility in compliance monitoring, and stream assessment and restoration programsassessment and restoration programsReporting to public through SOE, Living Rivers reporting.Reporting to public through SOE, Living Rivers reporting.Collaborative aquatic ecosystem assessments Collaborative aquatic ecosystem assessments integrating expertise in water quality, habitat/watershed integrating expertise in water quality, habitat/watershed GIS, and aquatic invertebrates.GIS, and aquatic invertebrates.