Total Phosphorus - Kootenai Tribe of Idaho

KOOTENAI RIVER
ECOSYSTEM PROJECT
USING AN ECOSYSTEM
APPROACH TO
EVALUATE FISHERIES
DECLINES IN A 6TH
ORDER REGULATED
RIVER IN NORTHERN
IDAHO, USA
Charlie Holderman, Kootenai Tribe of
Idaho
Ryan Hardy, Idaho Dept. Fish & Game
MAJOR NUTRIENTS (ug/l)
NUTRIENT SUMMARY; ABOVE
& BELOW LIBBY D.
2003 data (n=209)
350
300
250
200
TP
TN
NO3
150
100
50
0
B/L
DAM
ABOVE
DAM
Total Phosphorus
KR 1-KR10 b/l Libby Dam
KR 14 Above Dam
SUMMARY KR NUTRIENT
EXPERIMENT Plan (2005-2009)
• 1 ST YR. ADD 1.5 ug TDP
• 2 nd & 3rd yr add 3.0 ug TDP
• Add Nutrients in Summer & Early Fall
Period
• 4 th and 5th yrs, 3.0 ug TDP continued
• Evaluate After 5th year, Decide whether to
Continue
Added Nutrients
Showing Little Effect
on overall WQ (Hoyle
2006)
Mean Total Phosphorous Concentration (ug L -1)
TP 2006
60
Total
Phosphorus
40
20
0
KRF 0
KRF 1
KRF 2
KRF 3
KRF 4
KRF 5
KRF 6
KRF 7
KRF 8
Kootenai River Monitoring Sites
KRF 9 KRF 10 KRF 11 KRF 12
Mean Soluble Reactive Phosphorous Concentration (ug L -1)
80
70
SRP 2006
60
Soluble
Reactive
Phosphorus
50
40
30
20
10
0
KRF 0
KRF 1
KRF 2
KRF 3
KRF 4
KRF 5
KRF 6
KRF 7
KRF 8
KRF 9 KRF 10 KRF 11 KRF 12
Kootenai River Monitoring Sites
CHLOROPHYLL (mg/m2)
2005 ALGAL GROWTH
11X INCREASE IN PP, ~1 km Below addition
point; 2X, ~30 km downriver
18
16
14
12
10
8
S
6
4
2
0
KR9
KR6
KR9.1
BIOMONITORING LOCATIONS
KR6
2004 v. 2006 INVERT BIOMASS
(fall)
TS
9
8
7
M
IO
B
S
A
S
2) 6
M
(
5
4
2004 BIOMASS
TS
2006 BIOMASS (dry WT)
3
CS
2
1
0
KR 9
KR 9.1
KR 10
SUMMARY KR NUTRIENT
EXPERIMENT RESULTS SO FAR
(2005-2007)
• No Adverse Effects to Water Quality
• Significant increase in Algae Production
• 10-15 X Control
• Significant increase in Aquatic Insect
Production
• 3-5 X Control
• Fish Community, 3rd yr Data under review
• Should start to see effects this year

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